JP3290122B2 - Operation sound generator for electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation sound generating device for an electric device, and more particularly to an operation sound generating device for an electric device capable of reliably notifying a user of an operation by a sound without delay.

[0002]

2. Description of the Related Art For example, in a communication device such as a transceiver, a user may erroneously press a power key while holding the hand and turn off the power to interrupt communication.
In addition, the communication device is an arbitrary one of a plurality of CHs.
If the user can select and operate, the user may inadvertently press the CH switching key and lose communication with the other party.
In order to prevent these erroneous operations, when the power is turned off in response to the operation of the power key, a beep sound as a power-off operation sound is generated for a certain period of time to notify the user that the power has been turned off. Similarly, when the operation CH is changed by receiving the operation of the CH switching key, the CH
A beep sound is generated as a switching operation sound to notify the user that the operating channel has been changed.

FIG. 12 is a block diagram of a conventional FM transceiver having an operation sound generating function. Reference numeral 10 denotes a microphone, 11 denotes a microphone amplifier for amplifying the microphone input, 12 denotes an HPF for extracting a component of 300 Hz or more from the microphone input, and 13 denotes an IDC circuit (instantaneous deviation control circuit) for suppressing the maximum frequency shift to a certain value or less. ), 14 are 3k of the output of the IDC circuit
This is an LPF (splatter filter) that extracts components below Hz and creates a transmission baseband signal. Reference numeral 20 denotes a transmission / reception circuit, which, when being switched to the transmission mode by the system controller, FM-modulates the transmission baseband signal output from the LPF 14 to a desired operation channel.
Then, an FM-modulated wave having the transmission frequency is generated, and after power amplification, it is emitted from the transmission / reception antenna 21. Conversely, when the mode is switched to the reception mode, the received signal received from the external transmitting / receiving antenna 21 is amplified by RF, and then the received signal of the desired operation CH is extracted and converted to an intermediate frequency signal. Output. Operation CH for transmission / reception circuit 20
Is controlled by a system controller based on a user's instruction.

Reference numeral 30 denotes an I which amplifies an intermediate frequency signal of a desired operating channel output from the transmitting / receiving circuit 20 in the receiving mode.
F amplifier circuit, 31 outputs FM to the output of IF amplifier circuit 30
An FM detection circuit 32 for performing detection, a BPF 32 for extracting an audio signal component of 300 Hz to 3 kHz from an output of the FM detection circuit 31, and an audio signal 33 output from a system controller when a power-on operation (power-off operation) is performed by a user. A summing amplifier for adding and amplifying a beep sound signal as a power-on operation sound signal (power-off operation sound signal) or a beep sound signal as a CH switching operation sound signal output when a CH switching operation is performed; Audio power amplifier that amplifies the output of the
Here, the differential amplification type power amplifier PA-IC integrated into an IC
(The resistor for determining the power amplification gain is built in the IC). Reference numeral 35 denotes a speaker for acoustic conversion connected to the output side of the audio power amplifier 34 via a DC cut capacitor C1.

In the audio power amplifier 34, the output of the summing amplifier 33 is a differential amplification type power amplifier PA-.
It is input to the non-inverting input terminal (+) of the IC, and the differential amplification type power amplifier PA-IC performs non-inverting amplification and outputs.
Inverting input terminal of differential amplification type power amplifier PA-IC (-)
A capacitor C2 is connected between the ground and the ground, and the inverting input terminal (-) is grounded in an AC manner so that a predetermined power amplification gain can be obtained. Differential amplification type power amplifier P
In the A-IC, when the power is turned on and a normal amplification operation is enabled, a certain DC potential appears at the inverting input terminal (-), but the capacitor C2 is connected between the inverting input terminal (-) and the ground.
Is provided to prevent the inverting input terminal (-) from being DC grounded.

Reference numeral 36 denotes a noise level detection circuit,
For example, 30 kHz to 80 kHz in the output of the detection circuit 31
The noise level in the band is extracted, and the noise level is detected by DC detection. Then, it outputs a noise level detection signal (DC voltage) NL to the system controller.
Reference numeral 40 denotes a power supply circuit for selectively supplying power + B from a battery (not shown) to each unit under the control of the system controller. Reference numeral 41 denotes a key input unit, which includes a power key 42 for turning on / off the power, and an operation channel. An up key 43 and a down key 44 for performing a variable operation are provided. The power key 42, the up key 43, and the down key 44 output a key signal that is low when the key is pressed and high when the key is released. 45 designates PTT. SW, which outputs a switch signal that is low when pressed and high when released. Reference numeral 46 denotes a display unit for displaying an operation channel or the like.

Reference numeral 50 denotes a system controller having a microcomputer structure which controls the overall operation of the FM transceiver. In accordance with the operation of the SW 45, the power supply circuit 40 is turned on / off, the transmission / reception circuit 20 is switched between a reception mode and a transmission mode, the operation channel is switched, and the display of the operation channel is controlled. Or performs noise squelch control according to the level of the noise level indicated by the noise level detection signal NL in the reception mode. In addition, at the time of power ON / OFF operation and operation CH switching operation, the power supply circuit 40 is temporarily controlled to turn on the audio power amplifier 34 and generates a beep sound signal to output to the summing amplifier 33. And generate an operation sound.

The operation of the system controller 50 will be specifically described with reference to FIGS. It is assumed that the operation CH data = 5 immediately before the last power off is stored in the built-in memory (rewritable nonvolatile memory) of the system controller 50. (1) Power-on In the power-off state, when the user presses the power key 42 to perform a power-on operation, the power key signal falls from H to L. In response to the fall of the power key signal, the system controller 50 starts a first timer for measuring 500 ms, which is a reference time for determining whether the operation is valid or invalid (steps S1 and S2 in FIG. 13). It is checked whether the rising of the signal or the time-up is earlier (steps S3 and S4). If the rising of the power key signal is earlier, it is determined that the power-on operation is invalid because the power key 42 is pressed by mistake. The process returns to the first step without performing power-on control (step S4).
YES). If the user keeps pressing for 500 ms or more and the time is up first (YE in step S3)
S), the system controller 50 determines that a valid power-on operation has been performed. At this time, the power supply circuit 40 is controlled to turn on the power to the audio power amplifier 34 to supply the power, thereby bringing the power supply circuit 40 into operation (step S5).

Next, a beep sound signal as a power-on operation sound signal is generated for a predetermined time and output to the summing amplifier 33 (step S6). The beep signal is amplified by an audio power amplifier 34 and then output to a speaker 35 for acoustic conversion. User beeps to FM
It is known that the power of the transceiver is turned on, and if the power is turned on by mistake, the power can be turned off immediately to prevent battery consumption. Thereafter, the power supply circuit 40 is controlled to turn off the power to the audio power amplifier 34 to turn off the power once to prevent the battery from being consumed (step S7).

Thereafter, the power supply circuit 40 is supplied to each of the circuits (display unit 46, FM detection circuit 31,
Among the noise level detection circuit 36, the summing amplifier 33, and the transmission / reception circuit 20, power-on control to a circuit that requires power for transmission and reception, and a circuit that requires power only for reception (IF amplification circuit 30, transmission / reception circuit) In step 20, power-on control is performed on a circuit that requires power only at the time of reception, and power is supplied to each circuit (step S8). Then, the switching control to the reception mode, the switching control to the operation CH = 5 immediately before the power is turned off last time, the display control of the operation CH to the display unit 46 are performed for the transmission / reception circuit 20, and the reception from the partner side is waited (step S9). .

[0011] For example, C which can operate FM transceiver
Assuming that there are ten Hs, when there is no transmission on the fifth CH from the other party, the noise level detection signal NL output from the noise level detection circuit 36 has a large voltage value, indicating that the noise level is large. When there is transmission on the fifth CH from the other party, the received signal caught by the transmitting / receiving antenna 21 is subjected to RF amplification and conversion to an intermediate frequency signal in the receiving system of the transmitting / receiving circuit 20. The intermediate frequency signal of the received signal of the fifth CH is amplified by the IF amplifying circuit 30 and then the FM detection circuit 31
Is FM detected. When the partner is near and the reception electric field strength of the fifth CH is not weak, the noise level in the output of the FM detection circuit 31 is small, and the noise level detection signal NL has a small voltage value. However, if the other party is far away and the reception electric field strength of the fifth CH is weak, the noise level in the output of the FM detection circuit 31 is large, and the noise level detection signal NL has a large voltage value.

In the reception mode, the system controller 50 sets the noise level detection signal NL to a predetermined threshold voltage V
Compared to _TH , when the other party is not transmitting on the 5th CH or even if it is transmitting, the reception electric field strength is weak because it is far away and the noise level detection signal NL exceeds the threshold voltage _VTH. In this case, the power supply of the power supply 34 is kept off to prevent noise noise from being output from the speaker 35 and to prevent battery consumption (step S20 in FIG. 14).
S21). If the other party is transmitting on channel 5 and the received electric field strength is above a certain level and the noise level detection signal NL is below the threshold voltage V _TH , the power supply of the audio power amplifier 34 is turned on. Then, the received voice is output from the speaker 35 (step S22).

(2) Transmission The PTT. When the SW 45 is pressed, an L-level switch signal is output, and the system controller 50 that has input the signal determines that there is a transmission instruction operation (determination of YES in step S23). Circuits requiring power supply (I
In the F amplification circuit 30 and the transmission / reception circuit 20, the power supply to the circuit is controlled to be turned off by controlling the power supply to the circuit that requires power only at the time of reception, and the circuit (microphone) requiring power only at the time of transmission. In the amplifier 11, the IDC circuit 13, and the transmission / reception circuit 20, the power supply is controlled to turn on the power supply to the circuit that requires power only at the time of transmission, and the power supply to the circuit is further turned on. Turn off the supply to prevent battery drain. In addition, the transmission / reception circuit 20 is controlled to switch to the transmission mode (step S in FIG. 15).
40). The audio signal input by the microphone 10 passes through the microphone amplifier 11, the HPF 12, the IDC circuit 13, and the LPF 14, becomes a transmission baseband signal in a band of 300 Hz to 3000 Hz, and is FM-modulated and power-amplified by the transmission / reception circuit 20. The transmission / reception antenna 21 emits the signal at the transmission frequency of 5CH to the outside.

PTT. When the SW 45 is released, the switch signal rises to the H level, the system controller 50 determines that the transmission instruction operation has been completed, and the power supply circuit 40
Controls power-on to circuits that require power only during reception and supplies power to the circuits, and controls power-off to circuits that require power only during transmission and turns off power to the circuits. Control of the transmission / reception circuit 20 to the reception mode (YES in step S41, S4
2).

(3) Switching of Operation CH For example, when it is desired to change the operation CH to the sixth CH, the CH switching operation is performed twice by pressing the up key 43 of the key operation unit 41 twice in the reception mode. . When the up key signal falls from H to L by the first press of the up key 43, the system controller 50 starts a second timer for measuring 50 ms as a reference time for determining whether the operation is valid or invalid ( Step S24 in FIG. 14,
S25), it is checked which of the rising of the up key signal and the time up is earlier (steps S26, S2)
7) If the up-key signal rises earlier, it means that the up-key 43 has just been pressed by mistake and the invalid C
The flow proceeds to step S50 in FIG. 16 without performing the switching control of the operating CH as the H switching operation (YES in step S27).

If the user has continued to press for more than 50 ms and timed out earlier (YE in step S26)
S), the system controller 50 determines that a valid operation CH switching operation has been performed. At this time, the power supply circuit 40 is controlled to turn on the power to the audio power amplifier 34 so that the power is supplied to the power supply circuit 40, thereby bringing the power supply circuit 40 into an operating state (step S28). Next, a beep sound signal as a CH variable operation sound signal is generated for a certain period of time and output to the summing amplifier 32 (step S29). The beep signal is amplified by an audio power amplifier 34 and then amplified by a speaker 35.
And is converted to sound. The user knows that some operation has been performed from the beep sound, and if the user has mistakenly performed the CH variable operation, immediately performs the operation of returning to the original state so that communication with the other party is not disabled. Thereafter, the power supply circuit 40 is controlled to turn off the power to the audio power amplifier 34 to turn off the power once to prevent the battery from being consumed (step S30).

Thereafter, the operation CH data is incremented to 6 and the operation CH is transmitted to
H, and the operation C after the change is displayed on the display unit 46.
H is displayed (step S31). Similarly, when the up key signal falls from H to L again by the second pressing of the up key 43, if the user continues to press for more than 50 ms, a beep sound is emitted for a certain period of time and the operation CH data is incremented. Then, the transmission / reception circuit 20 is controlled to switch the operating CH to the seventh CH.

Conversely, when it is desired to change the operating CH to the sixth CH, the down key 44 of the key operation unit 41 is set in the reception mode.
Is pressed once to perform a CH switching operation. When the down key signal falls from H to L by pressing the down key 44, the system controller 50 starts a second timer that measures 50 ms (step S5 in FIG. 16).
0, S51), it is checked whether the rising of the down key signal or the time up is earlier (steps S52, S51).
53) If the down key signal rises earlier, it is simply because the down key was pressed by mistake, and it is determined that the operation is an invalid CH switching operation, and the process proceeds to step S70 in FIG. 17 without performing the operation CH switching control. (Step S
YES at 53).

If the user has pressed down for more than 50 ms and timed out earlier (YE in step S52)
S), the system controller 50 determines that a valid CH switching operation has been performed. At this time, the power supply circuit 4
0 to turn on the power to the audio power amplifier 34 to supply power and bring it into an operating state (step S
54). Next, a beep sound signal as a CH variable operation sound signal is generated for a fixed time and output to the summing amplifier 32 (step S55). The beep signal is amplified by an audio power amplifier 34 and then output to a speaker 35 for acoustic conversion. The user knows that some operation has been performed from the beep sound, and if the user has mistakenly performed the CH variable operation, immediately performs the operation of returning to the original state so that communication with the other party is not disabled. Thereafter, the power supply circuit 40 is controlled to turn off the power to the audio power amplifier 34 to turn off the power once to prevent the battery from being consumed (step S56).

Thereafter, the operation CH data is decremented to 6 and the operation CH is transmitted to
Control to switch to H. Operation C is displayed on the display unit 46.
H is displayed (step S57).

(4) Power-off When it is desired to turn off the power, the power key 42 is pressed to perform a power-off operation. In the power-on state, when the user presses the power key 42, the power key signal falls from H to L. The system controller 50 starts the first timer that measures 500 ms in response to the fall of the power key signal (steps S70 and S7 in FIG. 17).
1) It is checked which of the rising of the power key signal and the time-up is earlier (steps S72 and S73). If the rising of the power key signal is earlier, it means that the power key 41 has just been pressed by mistake and the invalid operation is performed. And returns to step S20 in FIG. 14 (YE in step S73).
S). If the user has continued to press for 500 ms or longer and timed out earlier (YES in step S72), system controller 50 determines that a valid power-off operation has been performed.

At this time, the power supply circuit 40 is controlled to turn on the power to the audio power amplifier 34 so as to supply the power, thereby bringing the power supply circuit 40 into operation (step S74). Then, a beep sound signal as a power-off operation sound signal is generated for a certain period of time and output to the summing amplifier 32 (step S).
75). This beep signal is sent to the audio power amplifier 3
After the power is amplified in step 4, the signal is output to the speaker 35 and converted into sound. The user knows from the beep that some operation has been performed, and if the user has accidentally performed the power-off operation, the user can immediately perform the power-on operation and return to the communication enabled state. Thereafter, the power supply control circuit 40 controls the power supply of all supply systems to be turned off to turn off the power (step S76).

[0023]

By the way, the above-mentioned F
In the M transceiver, the audio power amplifier 34
When the power supply to the differential amplifier PA-IC is in a normal operation state, the capacitor C2 is connected to a predetermined DC potential (referred to as E) appearing at the inverting input terminal (-) of the differential amplifier PA-IC. Although the battery is fully charged, when the power supply to the audio power amplifier 34 is turned off, the charging voltage V _C2 of the capacitor C 2 gradually decreases due to discharging,
Eventually, the voltage drops to the ground potential (see FIG. 18A).

Therefore, after the power supply to the audio power amplifier 34 is turned off, the system controller 50 supplies power to the audio power amplifier 34 and generates a beep signal in response to a key press after a while. At this time, the capacitor C2 is connected to the inverting input terminal (-).
From the first, the charging voltage V
_C2 is considerably lower than E, and the potential of the inverting input terminal (-) is also E
Considerably lower. At this time, the differential amplifier PA-IC cannot perform a normal amplification operation, and cannot amplify and output even if a beep signal is input. Therefore, the beeping sound is truncated (see FIG. 18 (2)).
In this case, there is a problem that the user does not notice that the user has performed any operation by mistake and leaves the FM transceiver in an undesired operation state.

The present invention has been made in view of the above-mentioned problems of the prior art,
It is an object of the present invention to provide an operation sound generating device for an electric device, which can surely notify a user that an operation has been performed, and minimizes the delay of the operation sound.

[0026]

According to a first aspect of the present invention, there is provided an operation sound generating apparatus for electric equipment, comprising: a power amplifying means for amplifying an audio signal; and an output of the power amplifying means. A sound converting means (35) for converting, an operating means (41) for performing a predetermined operation on the electric device, and when a certain operation is performed on the operating means (41), a control operation according to the operation is performed, and a power supply is provided. Control means (50A) for controlling the supply means (40) to temporarily supply power to the power amplification means (34) and for generating an operation sound signal to be input to the power amplification means (34); The power amplifying means (34) receives an operation sound signal at a non-inverting input terminal (+) and connects a capacitor (C2) between the inverting input terminal (-) and ground.
In an operation sound generating device for an electric device constituted by a differential amplifier (PA-IC) connected to a power amplifier, a certain operation is performed this time since power supply to the power amplifying means (34) was turned off last time. Determination means (5) for determining the length of time elapsed until
0A), and the control means (50A) is provided with the operation means (4
When a certain operation is performed in 1), power supply ON control to the power amplifying means (34) is performed in advance, and an operation sound signal is generated when a certain waiting time elapses. The waiting time is changed in accordance with the length of time elapsed from when the power supply to the power amplifying means (34) is turned off last time to the time when a certain operation is performed, as determined by the determining means (50A). That is, it is characterized.

As a result, the operation sound signal is input to the non-inverting input terminal (+), and the differential amplifier (PA-IC) having the capacitor (C2) connected between the inverting input terminal (-) and the ground.
However, even when the operation is performed, when a certain operation is performed, the power is supplied to the power amplification means (34) first, and after the normal amplification operation is enabled, the operation sound signal is generated. Since the signal is input to the power amplification means (34), the sound conversion means (3
The operation sound output from 5) is not interrupted, the user can always know that a certain operation has been performed, and the electric device will not be left in an inconvenient operation state. Moreover, since the power supply to the power amplifying means (34) was turned off last time, not much time has passed.
If the charging voltage of the capacitor (C2) is not so low, the power amplifying means (3
When power is supplied to 4), a normal amplification operation can be performed immediately. However, in this case, the operation sound signal is input in a relatively short waiting time after the power is supplied to the power amplification means (34). The delay time from when the operation is performed to when the operation sound is output is small, and no uncomfortable feeling is generated.

According to a second aspect of the present invention, there is provided the operation sound generating apparatus for an electric device, wherein the control means (50A) controls the operation means (41) such that a certain operation is performed for a predetermined reference time or more. In the case where a continuous operation is treated as a valid operation, and if the operation is stopped before the lapse of a predetermined reference time, the operation is regarded as an invalid operation, the control means (50A) determines whether a certain operation has been performed. The power supply on control to the power amplifying means (34) is performed in advance before the time elapses, and when the operation is stopped before a predetermined reference time elapses after the certain operation, the power amplification is performed. The power supply to the power amplification means (34) is controlled to be OFF, and the certain operation is continuously performed for a predetermined reference time or more, and the waiting time has elapsed from the power supply ON control to the power amplification means (34). To generate an operation sound signal It is characterized by things, the.

Thus, when a certain operation is made effective by the operation means (41) for a predetermined operation duration or more, when a certain operation is performed, the predetermined operation duration is not lapsed. Since power is supplied to the power amplifying means (34), a delay until a certain operation is performed and an operation sound is output after a predetermined operation continuation time has elapsed can be further reduced.

According to a third aspect of the present invention, there is provided an operation sound generating apparatus for an electric device, comprising a power amplifying means (3) for amplifying an audio signal.
4), an acoustic conversion means (35) for acoustically converting the output of the power amplifying means (34), an operation means (41) for performing a predetermined operation on the electric device, and a certain operation by the operation means (41). When performing a control operation according to the operation,
Power amplifying means (34) by controlling the power supply means (40);
Control means (50) for temporarily supplying power to the power amplifier and generating an operation sound signal and inputting it to the power amplifier (34).
A), the power amplifying means (34) includes a differential amplifier in which an operation sound signal is input to a non-inverting input terminal (+), and a capacitor (C2) is connected between the inverting input terminal (-) and ground. In an operation sound generating device for an electric device constituted by an amplifier (PA-IC), when a certain operation is performed by an operation means (41), the capacitor (C2) of the power amplification means (34) at that time is operated. Determining means (5) for determining the magnitude of the charging voltage;
0A), and the control means (50A) is provided with the operation means (4
When a certain operation is performed in 1), power supply ON control to the power amplifying means (34) is performed in advance, and an operation sound signal is generated when a certain waiting time elapses. The waiting time is varied in accordance with the magnitude of the charging voltage of the capacitor determined by the determining means (50A).

As a result, the operation sound signal is input to the non-inverting input terminal (+), and the differential amplifier (PA-IC) in which the capacitor (C2) is connected between the inverting input terminal (-) and the ground.
However, even when the operation is performed, when a certain operation is performed, the power is supplied to the power amplification means (34) first, and after the normal amplification operation is enabled, the operation sound signal is generated. Since the signal is input to the power amplification means (34), the sound conversion means (3
The operation sound output from 5) is not interrupted, the user can always know that a certain operation has been performed, and the electric device will not be left in an inconvenient operation state. Moreover, since the power supply to the power amplifying means (34) was turned off last time, not much time has passed.
If the charging voltage of the capacitor (C2) is not so low, the power amplifying means (3
When power is supplied to 4), a normal amplification operation can be performed immediately. However, in this case, the operation sound signal is input in a relatively short waiting time after the power is supplied to the power amplification means (34). The delay time from when the operation is performed to when the operation sound is output is small, and no uncomfortable feeling is generated.

According to a fourth aspect of the present invention, there is provided the operating sound generating apparatus for an electric device according to the third aspect, wherein the control means (50A) controls the operation means (41) to perform a certain operation for a predetermined reference time or more. In the case where a continuous operation is treated as a valid operation, and if the operation is stopped before the lapse of a predetermined reference time, the operation is regarded as an invalid operation, the control means (50A) determines whether a certain operation has been performed. The power supply on control to the power amplifying means (34) is performed in advance before the time elapses, and when the operation is stopped before a predetermined reference time elapses after the certain operation, the power amplification is performed. The power supply to the power amplification means (34) is controlled to be OFF, and the certain operation is continuously performed for a predetermined reference time or more, and the waiting time has elapsed from the power supply ON control to the power amplification means (34). To generate an operation sound signal It is characterized by things, the.

Thus, when a certain operation is made effective by the operation means (41) for a predetermined operation continuation time or more, if a certain operation is performed, the predetermined operation continuation time elapses. Since power is supplied to the power amplifying means (34), a delay until a certain operation is performed and an operation sound is output after a predetermined operation continuation time has elapsed can be further reduced. In the first or second or third or fourth aspect, the operation sound may be generated for all operations on the electric device, but may be generated only when a part or one or more specific operations are performed. Is also good.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, referring to FIG.
One embodiment will be described. FIG. 1 is a block diagram showing the configuration of an FM transceiver having an operation sound generating function according to the present invention. The same components as those in FIG. 12 are denoted by the same reference numerals. 50A is a system controller of the microcomputer constituting responsible for overall control of the FM transceiver, keystrokes
Key operation on the power unit 41 and the PTT. In response to the operation of the SW 45, the power supply circuit 40 is turned on / off, the transmission / reception circuit 20 is switched between a reception mode and a transmission mode, the operation channel is switched, and the noise level is reduced in the reception mode. Noise squelch control is performed according to the level of the noise level indicated by the detection signal NL.

The system controller 50A operates at the time of the power ON / OFF operation and the operation CH switching operation.
The audio power amplifier 34 for the power supply circuit 40
And a beep sound signal is generated and output to the summing amplifier 33 to generate an operation sound. However, at the time of switching operation when the power-off operation of the operational CH, prior to generation of the beep sound signals to turn on the audio power amplifier 34, accordingly after a certain waiting time T _W elapse before a normal amplifying operation After it becomes possible, a beep signal is input to prevent the beep from being cut off. The system controller 50A
By determining the length of time that has elapsed since the power of the audio power amplifier 34 was last turned off, the capacitor C2 at the time of the operation of switching the operation CH and at the time of the power off operation is determined.
By determining the magnitude of the charging voltage V _C2 , and by varying the waiting time T _W in accordance with the result of the determination, the delay from when the operation is performed to when the operation sound is actually output is not unnecessarily long. .

Here, as an example, as shown by a solid line A in FIG. 8, when the power of the audio power amplifier 34 is turned off and the charging voltage V _C2 of the capacitor _C2 is lowered from E by discharging, the power is turned on. Before 180 seconds have elapsed since the power was turned off, V _C2 is still equal to or higher than the predetermined reference value v _o , and when the power of the audio power amplifier 34 is turned on in this state, the charging voltage V C of the capacitor C 2 is within 60 ms at the latest. _C2 reaches E and audio power amplifier 34
Indicates that normal amplification operation is possible (FIG. 8 (1)).
Broken line B). Further, it is turned off the power of the audio power amplifier 34, the charge voltage V _C2 of the capacitor C2 is powered on audio power amplifier 34 in a state of reduced to zero V by the discharge, at the latest charge the capacitor C2 within 180ms It is assumed that the voltage V _C2 reaches E and the audio power amplifier 34 can perform a normal amplification operation (see a broken line C in FIG. 8B).

In this case, the system controller 50A
Is determined by determining whether the elapsed time since the power of the audio power amplifier 34 was turned off last time is longer or shorter than 180 seconds, and the charging voltage V _C2 of the capacitor C2 during operation is v
_{o It is} determined whether it is less than or equal to or more than 180 seconds after the power of the audio power amplifier 34 is turned off,
When the charging voltage V _C2 of the capacitor C2 the following v _o set the waiting time T _W to 180 ms, the elapsed time from the power supply of the audio power amplifier 34 is turned off less than 180 seconds, the charging voltage V of the capacitor C2 _{When C2} is equal to or longer than v _o , the waiting time T _W is set to 60 ms to determine the magnitude of the charging voltage V _C2 of the capacitor C2 during operation, and the waiting time T _W is varied according to the determination result. The other components are configured exactly the same as in FIG.

The operation of the system controller 50A will be specifically described with reference to FIGS. 2 to 7 are flowcharts showing the operation of the system controller 50A,
FIG. 8 is an explanatory diagram for explaining the operation sound generation operation.
It is assumed that the operation CH data = 5 immediately before the power was turned off last time is stored in the built-in memory (rewritable nonvolatile memory) of the system controller 50A. Also, the charging voltage V _C2 of the capacitor C2 of the audio power amplifier 34 is zero volt and the audio power amplifier 3
4 can be sufficiently reached within 180 ms even when the power of the power supply 4 is turned on. Further, when the power of the audio power amplifier 34 is turned on when V _C2 is equal to or more than _vo , it is sufficient within 60 ms. (See B in FIG. 8 (1) or C in (2)). Also, it is assumed that the power supply of the FM transceiver is in the off state, and the system controller 50A has started counting the time from zero in the first timer when the power supply of the audio power amplifier 34 was lastly turned off last time. .

(1) Power-on In the power-off state, when the user presses the power key 42 to perform a power-on operation, the power key signal falls from H to L. In response to the fall of the power key signal, the system controller 50A starts a first timer that measures 500 ms, which is a reference time for determining whether the operation is valid or invalid (steps S101 and S102 in FIG. 2).
It is checked whether the rise of the power key signal or the time up is earlier (steps S103 and S104). If the rise of the power key signal is earlier, an invalid power-on operation due to the power key 42 being pressed by mistake is performed. If there is, the process returns to the first step without performing power-on control (YES in step S104). If the user is 50
If the time is up first by continuing to press for 0 ms or more (YES in step S103), the system controller 50
A determines that a valid power-on operation has been performed. At this time, the audio power amplifier 3 is connected to the power supply circuit 40.
4 to turn on the power and control the power supply for 180 ms.
A third timer for measuring the time is started, and waits for the time to elapse (steps S105 and S106). The charging voltage V _C2 of the capacitor C2 rises toward E.

When the third timer times out, a beep sound signal as a power-on operation sound signal is generated for a certain period of time and output to the summing amplifier 33 (Y in step S107).
ES, S108). When 180 ms has elapsed since the power was turned on, the charging voltage V _C2 of the capacitor C ₂ has reached E, and the audio power amplifier 34 can perform a normal power amplification operation. Therefore, the beep sound signal is amplified by the audio power amplifier 34 and then the speaker 3
5 for acoustic conversion. The user knows from the beep that the FM transceiver has been turned on.
When the power is turned on by mistake, the power can be turned off immediately to prevent the battery from being consumed.

After that, the power supply circuit 40 is controlled to turn off the power to the audio power amplifier 34, thereby turning off the power once to prevent the battery from being consumed. Then, a fourth timer for measuring the elapsed time since the power of the audio power amplifier 34 was turned off last time is started.
The flag F indicating whether or not the elapsed time since the power of the audio power amplifier 34 has been turned off exceeds a predetermined time (here, 180 seconds) is cleared (step S10).
9).

When the power of the FM transceiver is in the ON state, the system controller 50A periodically (for example, 1
The interrupt processing shown in FIG. 7 is executed at every second), and if the fourth timer is operating, the power of the audio power amplifier 34 is turned off last time by checking whether or not the time has exceeded 180 seconds. It is determined whether the elapsed time has elapsed since then (steps S200 and S201 in FIG. 7). If the elapsed time is not exceeded, a flag is set to indicate that the elapsed time is still short and the charging voltage V _C2 of the capacitor C2 is still v ₀ or more. F
Remains at 0 (NO in step S201, S20
2). If the time counted by the fourth timer exceeds 180 s, the time elapsed since the power of the audio power amplifier 34 was turned off is long, and the charging voltage V _C2 of the capacitor C ₂ has dropped to v ₀ or less. Flag F to indicate
And stops the fourth timer (YE in step S201).
S, S203, 204).

(2) Reception Returning to FIG. 2, after step S109, the power supply circuit 40 is supplied to each circuit (display units 46, F
Among the M detection circuit 31, the noise level detection circuit 36, the summing amplifier 33, and the transmission / reception circuit 20, power-on control for a power supply circuit for transmission and reception, and a circuit (IF amplification) requiring power supply only for reception. Circuit 30, transmitting / receiving circuit 2
In step S110, power-on control is performed on a circuit that requires power only at the time of reception, and power is supplied to each circuit (step S110). Then, the transmission / reception circuit 20 is controlled to switch to the reception mode, the control is switched to the operation channel = 5 immediately before the power is turned off last time, and the display control of the operation channel is performed on the display unit 46, and waits for reception from the other party (step S111). .

For example, C which can operate the FM transceiver
Assuming that there are ten Hs, when there is no transmission on the fifth CH from the other party, the noise level detection signal NL output from the noise level detection circuit 36 has a large voltage value, indicating that the noise level is large. When there is transmission on the fifth CH from the other party, the received signal caught by the transmitting / receiving antenna 21 is subjected to RF amplification and conversion to an intermediate frequency signal in the receiving system of the transmitting / receiving circuit 20. The intermediate frequency signal of the received signal of the fifth CH is amplified by the IF amplifying circuit 30 and then the FM detection circuit 31
Is FM detected. When the partner is near and the reception electric field strength of the fifth CH is not weak, the noise level in the output of the FM detection circuit 31 is small, and the noise level detection signal NL has a small voltage value. However, if the other party is far away and the reception electric field strength of the fifth CH is weak, the noise level in the output of the FM detection circuit 31 is large, and the noise level detection signal NL has a large voltage value.

In the reception mode, the system controller 50A outputs the noise level detection signal NL to a predetermined threshold voltage V
Compared to _TH , when the other party is not transmitting on the 5th CH or even if it is transmitting, the reception electric field strength is weak because it is far away and the noise level detection signal NL exceeds the threshold voltage _VTH. 34, so that noise noise is not output from the speaker 35 (NO in step S120 in FIG. 3, YE in S121).
S). At this time, since the fourth timer is counting the time, the system controller 50A periodically checks by the interrupt processing in FIG. 7 whether 180 seconds have elapsed since the power of the audio power amplifier 34 was last turned off (step S2).
00, S201), and after 180 seconds, the flag F is set and the fourth timer is stopped (steps S203, S201).
204), if 180 seconds have not yet elapsed, the flag F
Is kept at 0 (step S20).
2).

If the other party is transmitting on the fifth channel,
In addition, when the received electric field intensity is equal to or more than a predetermined value and the noise level detection signal NL falls below the threshold voltage _VTH , the power of the audio power amplifier 34 is turned on, and the received sound is output from the speaker 35. At this time, the transmission from the other party usually lasts much longer than 180 ms, and the charging voltage V _C2 of the capacitor C2 rises to E, so that the fourth timer is stopped and the flag F is cleared (step S1). S122). Thereafter, transmission from the other party stops, and the noise level detection signal NL changes to the threshold voltage V _TH
Is exceeded, the power of the audio power amplifier 34 is turned off, and the timing is restarted from zero by the fourth timer,
Further, the flag F is cleared (step S123).

(3) Transmission The PTT. When the SW 45 is pressed, an L-level switch signal is output, and the system controller 50A that has received the signal determines that there is a transmission instruction operation (YES in step S124), and the power of the audio power amplifier 34 must be turned off. The timer is turned off, the timing is restarted from zero by the fourth timer, and the flag F is cleared (step S140 in FIG. 4,
S141). Then, for the power supply circuit 40, a circuit that requires power only at the time of transmission (microphone amplifier 11, IDC
13. In the transmission / reception circuit 20, power-on control is performed on a circuit that requires power only at the time of transmission (a circuit that requires power only at the time of transmission), and power is supplied to the circuit.
0, the power supply to the circuit which requires power only at the time of reception in the transmission / reception circuit 20 is controlled to turn off the power supply to the circuit. Further, the switching control of the transmission / reception circuit 20 to the transmission mode is performed (step S142). Microphone 10
The audio signal input by the microphone amplifier 11 and the HPF 1
2. 300 Hz through the IDC circuit 13 and LPF 14
It becomes a transmission baseband signal in a band of 3000 Hz, and is FM-modulated and power-amplified by the transmission / reception circuit 20.
The transmission / reception antenna 21 emits the signal at the transmission frequency of the channel to the outside.

PTT. When SW 45 is released, the switch signal rises to H level, and the system controller 50A
Determines that the transmission instruction operation has been completed, controls the power supply circuit 40 to turn on power to the circuit that requires power only at the time of reception, and supplies power to the circuit. To turn off the power supply to the circuit, and control the transmission / reception circuit 20 to switch to the reception mode (YE in step S143).
S, S144).

(4) Switching of Operation CH For example, when it is desired to change the operation CH to the seventh CH, the CH switching operation is performed twice by pressing the up key 43 of the key operation unit 41 twice in the reception mode. When the up key signal falls from H to L at the first operation of the up key 43, the system controller 50A
A second timer for counting s is started (steps S125 and S126). Then, it is checked which of the rising of the up key signal and the time up is earlier (steps S127 and S128). If the rising of the up key signal is earlier, the up key 43 is merely erroneously pressed, and the invalid CH is invalid. The process proceeds to step S150 in FIG. 5 without performing the switching control of the operating channel as the switching operation (YES in step S128).

If the user has pressed down for more than 50 ms and timed out earlier (YE in step S127)
S), the system controller 50A determines that a valid operation CH switching operation has been performed. At this time,
The power supply circuit 40 is controlled to turn on the power to the audio power amplifier 34 to supply power (step S12).
9), the operation CH data is incremented to 6 and the transmission / reception circuit 20 is controlled to switch the operation CH to the sixth CH, and the changed operation CH is displayed on the display unit 46 (step S130).

Then, the flag F is checked. If F = 0, the elapsed time since the power of the audio power amplifier 34 was last turned off is short, so the third timer is 60 ms.
(Steps S131 and S132; FIG. 8).
Conversely, if F = 1, the elapsed time since the power of the audio power amplifier 34 was last turned off is long, and the third timer measures 180 ms (steps S131 and S133). FIG. 8 (2)).

Then, it waits until the third timer times out (step S134). Then, when the third timer times out, a beep sound signal as a power-on operation sound signal is generated for a fixed time and output to the summing amplifier 33 (step S135). At this time, if 180 seconds or more have passed between the time when the power of the audio power amplifier 34 was previously turned off and the time when the power is turned on this time, the power of the audio power amplifier 34 was turned off 180 ms before the beep signal was generated. When the beep sound signal is input to the audio power amplifier 34 because the switch is on, the charging voltage V _C2 of the capacitor C2 has reached E, and the differential amplification type power amplifier PA-IC can perform a normal power amplification operation. The beep sound signal is power-amplified by the audio power amplifier 34 without interruption from the head portion, and then output to the speaker 35 for acoustic conversion (see FIG. 8 (2)). As a result, the user can be sure that some operation has been performed from the beep sound without a truncation,
When the CH variable operation is mistakenly performed, the operation is immediately restored to prevent the communication with the partner from being disabled.

Also, the audio power amplifier 34
Between the time the power is turned off and the time it is turned on
When 80 seconds or more have not elapsed, the power of the audio power amplifier 34 has been turned on 60 ms before the beep signal is generated.
When the beep sound signal is input to the differential amplification type power amplifier PA when the charging voltage V _C2 of the capacitor C2 has reached E.
-The IC is capable of normal power amplification operation, and the beep sound signal is power-amplified by the audio power amplifier 34 without interruption from the head portion, then output to the speaker 35 and acoustically converted (FIG. 8 (1) )reference). In addition, 60 seconds after the power of the audio power amplifier 34 is turned on.
Since a beep sound is output after ms, the delay from the operation of the up key 43 to the output of the beep sound is small, and the user does not feel uncomfortable.

After the processing in step S135, the system controller 50A controls the power supply circuit 40 to turn off the power to the audio power amplifier 34, turns off the power once, and restarts time measurement from zero with the fourth timer. And the flag F is cleared (step S13).
6). Thereafter, similarly, when the up key signal falls from H to L again by the second operation of the up key 43, if the user continues to press the key for 50 ms or more, a beep sound is emitted for a certain period of time, and the operation CH The data is incremented to 7 and the operation CH is set to 7C for the transmission / reception circuit 20.
Control to switch to H.

Conversely, when it is desired to change the operating CH to the sixth CH, the down key 44 of the key operation unit 41 is set in the reception mode.
Is pressed once to perform the CH switching operation once. When the down key signal falls from H to L by operating the down key 44, the system controller 50A first sets 50 ms.
A second timer for measuring the time is started (steps S150 and S151 in FIG. 5). Then, it is checked which of the rising of the down key signal and the time up is earlier (steps S152 and S153). If the rising of the down key signal is earlier, it is merely that the down key 43 was pressed by mistake and the invalid CH is invalid. The process proceeds to step S170 in FIG. 6 without performing the switching control of the operating CH as the switching operation (YES in step S153).

If the user has continued to press for more than 50 ms and timed out first (YE in step S152)
S), the system controller 50A determines that a valid operation CH switching operation has been performed. At this time,
The power supply circuit 40 is controlled to turn on the power to the audio power amplifier 34 to supply power (step S15).
4), the operation CH data is decremented to 6, the transmission / reception circuit 20 is controlled to switch the operation CH to the sixth CH, and the changed operation CH is displayed on the display unit 46 (step S155).

Then, the flag F is checked. If F = 0, the elapsed time since the power of the audio power amplifier 34 was previously turned off is short.
(Steps S156 and S157; FIG. 8).
Conversely, if F = 1, the elapsed time since the power of the audio power amplifier 34 was last turned off is long, so that the third timer measures 180 ms (steps S156 and S158). FIG. 8 (2)).

Then, it waits until the third timer times out (step S159). Then, when the third timer times out, a beep sound signal as a power-on operation sound signal is generated for a fixed time and output to the summing amplifier 33 (step S160). At this time, if 180 seconds or more have passed between the time when the power of the audio power amplifier 34 was previously turned off and the time when the power is turned on this time, the power of the audio power amplifier 34 was turned off 180 ms before the beep signal was generated. When the beep sound signal is input to the audio power amplifier 34 because the switch is on, the charging voltage V _C2 of the capacitor C2 has reached E, and the differential amplification type power amplifier PA-IC can perform a normal power amplification operation. The beep sound signal is power-amplified by the audio power amplifier 34 without interruption from the head portion, and then output to the speaker 35 for acoustic conversion (see FIG. 8 (2)). As a result, the user can be sure that some operation has been performed from the beep sound without a truncation,
When the CH variable operation is mistakenly performed, the operation is immediately restored to prevent the communication with the partner from being disabled.

Also, the audio power amplifier 34
Between the time the power is turned off and the time it is turned on
When 80 seconds or more have not elapsed, the power of the audio power amplifier 34 has been turned on 60 ms before the beep signal is generated.
When the beep sound signal is input to the differential amplification type power amplifier PA when the charging voltage V _C2 of the capacitor C2 has reached E.
-The IC is capable of normal power amplification operation, and the beep sound signal is power-amplified by the audio power amplifier 34 without interruption from the head portion, then output to the speaker 35 and acoustically converted (FIG. 8 (1) )reference). In addition, 60 seconds after the power of the audio power amplifier 34 is turned on.
Since a beep sound is output after ms, the delay from when the down key 43 is operated to when the beep sound is output is small, and the user does not feel uncomfortable.

After the processing in step S160, the system controller 50A controls the power supply circuit 40 to turn off the power to the audio power amplifier 34, turns off the power once, and restarts the timing from zero with the fourth timer. And the flag F is cleared (step S16).
1).

(5) Power Off To turn off the power, the power key 4
2 is pressed once. When the user operates the power key 42 in the power-on state, the power key signal falls from H to L. In response to the fall of the power key signal, the system controller 50A starts a first timer that measures 500 ms (steps S170 and S1 in FIG. 6).
71). Then, it is checked which of the rising of the power key signal and the time up is earlier (step S172,
S173) If the rise of the power key signal is earlier, it is simply that the power key 42 was pressed by mistake, and the process proceeds to step S120 in FIG. 3 without performing power off control as an invalid power off operation (S173). Step S173
YES).

If the user has continued to press for 500 ms or more and timed out earlier (YE in step S172)
S), the system controller 50A determines that a valid power-off operation has been performed. At this time, the power supply circuit 40 immediately controls the power supply of the audio power amplifier 34 to supply power (step S174). Then, check the flag F, and if F = 0,
Since the elapsed time from when the power of the audio power amplifier 34 is turned off is short, the third timer measures 60 ms (steps S175 and S176; see FIG. 8A). Conversely, if F = 1, Last time, audio power amplifier 34
Since the elapsed time since the power of the power supply is turned off is long, the third timer measures 180 ms (steps S175 and S175).
177. FIG. 8 (2)).

Then, it waits until the third timer times out (step S178). Then, when the third timer times out, a beep sound signal as a power-on operation sound signal is generated for a certain period of time and output to the summing amplifier 33 (step S179). At this time, if 180 seconds or more have passed between the time when the power of the audio power amplifier 34 was previously turned off and the time when the power is turned on this time, the power of the audio power amplifier 34 was turned off 180 ms before the beep signal was generated. When the beep sound signal is input to the audio power amplifier 34 because the switch is on, the charging voltage V _C2 of the capacitor C2 has reached E, and the differential amplification type power amplifier PA-IC can perform a normal power amplification operation. The beep sound signal is power-amplified by the audio power amplifier 34 without interruption from the head portion, and then output to the speaker 35 for acoustic conversion (see FIG. 8 (2)). As a result, the user can be sure that some operation has been performed from the beep sound without a truncation,
If you accidentally turn off the power, perform an operation to immediately restore it so that communication with the other party is not disabled.

Also, the audio power amplifier 34
Between the time the power is turned off and the time it is turned on
When 80 seconds or more have not elapsed, the power of the audio power amplifier 34 has been turned on 60 ms before the beep signal is generated.
When the beep sound signal is input to the differential amplification type power amplifier PA when the charging voltage V _C2 of the capacitor C2 has reached E.
-The IC is capable of normal power amplification operation, and the beep sound signal is power-amplified by the audio power amplifier 34 without interruption from the head portion, then output to the speaker 35 and acoustically converted (FIG. 8 (1) )reference). In addition, 60 seconds after the power of the audio power amplifier 34 is turned on.
Since a beep sound is output after ms, the delay between the operation of the power key 42 and the output of the beep sound is small, and the user does not feel uncomfortable.

After the processing in step S179, the system controller 50A controls the power supply circuit 40 to turn off the power of all the supply systems, and turns off the power (step S180).

According to this embodiment, the system controller 50A operates to turn off the power by pressing the power key 42 of the key operation unit 41 or to operate the up key 43
Further, when an operation for switching up or down the operation CH is performed by an operation by pressing the down key 44, power supply ON control to the audio power amplifier 34 is performed in advance, and thereafter, the audio power amplifier 34 depending from the off power of the length of elapsed time, to generate a beep signal as an operation sound signal at the time of the lapse of the waiting time T _W of 180ms or 60 ms. Therefore, even when the capacitor C2 is connected between the inverting input terminal (-) of the differential amplification type power amplifier PA-IC constituting the audio power amplifier 34 and the ground, various operations are performed. The power is first supplied to the audio power amplifier 34, and the charging voltage V of the capacitor C2 is
_After the normal amplifying operation becomes possible after _C2 reaches E, the beep signal is input to the audio power amplifier 34, so that the beep sound from the speaker 35 is not cut off, and Can always know that an operation has been performed and will not leave the FM transceiver in an undesired operating state.

Moreover, the audio power amplifier 3
When the time elapsed since the power supply of the power supply No. 4 was turned off is short and the charging voltage V _C2 of the capacitor C2 at the time of key operation is still large,
The delay from turning on the power of the audio power amplifier 34 in response to the key operation to generating a beep sound can be as short as 60 ms. Therefore, there is no discomfort when the delay time until the beep sound is generated after the key operation is long. In addition, the system controller 50A determines the capacitor C2 of the audio power amplifier 34 when a certain operation is performed on the key operation unit 41 due to the length of time elapsed since the power supply to the audio power amplifier 34 was previously turned off. Since the magnitude of the charging voltage V _C2 of the capacitor C2 is determined, it is not necessary to directly detect the charging voltage V _C2 of the capacitor C2, and the wiring is not complicated.

By the way, the system controller 50A
Is a key operation unit 41, an up key 43, a down key 4
When the CH switching operation by pressing 4 is continuously performed for 50 ms or more, it is treated as an effective operation, and the transmission / reception circuit 2
CH switching control for 0, but key press
If the operation is canceled before the elapse of 0 ms and the operation is stopped, the operation is treated as an invalid operation. In this regard, for example, steps S125 to S136 in FIG.
When the CH switching operation is started by pressing the up key 43, the system controller 50A controls the power supply on to the audio power amplifier 34 in advance with the start of the second timer (step S210). , S211), if the flag F is 0, the third
The timer starts measuring 60 ms (step S21).
2, S213), if the flag F is 1, 1
The timer of 80 ms is started (steps S212, S2
14).

Then, CH by pressing the up key 43
When the operation is stopped 50 ms before the switching operation is started, the power supply to the audio power amplifier 34 is turned off (steps S216 and S21).
7) If the CH switching operation has been performed continuously for 50 ms or more, the current CH switching operation is validated, and a beep signal is generated when the third timer times out (YES in steps S215 and 218, S219). After that, the power supply to the audio power amplifier 34 is turned off, the fourth timer is restarted, the flag F is cleared, and the operating channel is increased by one (steps S220 and S221). Thus, when the CH-up operation is, it enabled or disabled to be small delay from when 50ms is passed a reference time to beep out to determine, particularly when the waiting time T _W is 180ms In addition, it is possible to prevent a sense of incongruity from occurring.

Similarly, steps S150 to S1 in FIG.
When the channel switching operation is started by pressing the down key 44, the system controller 50A performs the control of turning on the power supply to the audio power amplifier 34 in advance along with the start of the second timer. In advance (steps S230 and S231), the flag F
If the flag F is 0, the third timer starts measuring 60 ms (steps S232 and S233). If the flag F is 1, the third timer starts measuring 180 ms (steps S232 and S234).

Then, when the down key 44 is pressed, CH
If the operation is stopped 50 ms before the switching operation is started, the power supply to the audio power amplifier 34 is turned off (steps S236 and S23).
7) If the CH switching operation has been performed continuously for 50 ms or more, the current CH switching operation is made valid, and a beep signal is generated when the third timer times out (YES in steps S235 and S238, S239). ),
Thereafter, the power supply to the audio power amplifier 34 is turned off, the fourth timer is restarted, the flag F is cleared, and the operating channel is reduced by one (steps S240 and S241). In this way, CH
When down operation is, it enabled or disabled to be small delay from when 50ms is passed a reference time to beep out to determine, especially when waiting time T _W is 180 ms, the discomfort from occurring Can be prevented.

Note that, in the above-described embodiment, FIG.
The first timer started in step S102 of FIG. 3, step S126 of FIG. 3, step S151 of FIG. 5, and step S171 of FIG.
A time other than 50 ms may be measured. Further, step S104 in FIG. 2 and step S12 in FIG.
8, step S153 in FIG. 5, step S173 in FIG.
If the charging time V _C2 of the capacitor C2 at the time when the power of the audio power amplifier 34 is turned on is v ₀ , the time counted by the third timer started at Other times such as 50 ms may be used. Similarly, the time measured by the third timer started in step S105 in FIG. 2, step S129 in FIG. 3, step S154 in FIG. 5, and step S174 in FIG. Even when the charging voltage V _C2 of the capacitor C2 at the time when the power supply of
150ms if you can reach E enough
It may be another time.

In the above-described embodiment or the modified example, when the power-off operation and the CH switching operation are performed,
The waiting time T _W from when the power to the audio power amplifier 34 is turned on to when a beep signal is generated is varied according to the length of time elapsed since the power to the audio power amplifier 34 was turned off last time. As described above, the charging voltage V _C2 of the capacitor C2 when the power-off operation and the CH switching operation are performed is directly detected, the magnitude of the read V _C2 is determined, and based on the determination result, the V _C2 is large. shortens the waiting time T _W, V _C2 may be long and the waiting time T _W when the small.

Specifically, for example, when the up key 43 is operated, the processing of steps S131 to S133 in FIG. 3 or the processing of steps S212 to S214 in FIG. 9 is replaced by the processing in steps S1103 to S1106 in FIG. as deformed, after step S211 in step S130 or 9 in FIG. 3, reads the charging voltage V _C2 of the capacitor C2 (step S1103), v _O or whether checked (step S1104), V _C2 is v _o If so, the third timer starts measuring 60 ms (step S1105),
If V _C2 is smaller than v _o , the third timer starts measuring 180 ms (step S1106). Similarly, when the down key 44 is operated, steps S156 to S158 in FIG. 5 or steps S23 to S in FIG.
Similarly, the processing of steps S175 to S177 in FIG. 6 when the power key 42 is operated is also modified as in steps S1103 to S1106 in FIG. In these cases, the processing of FIG. 7 becomes unnecessary.

Further, in the above-described embodiment, the case where the operation sound is output when the power-off operation or the CH switching operation is performed has been described as an example. The same applies when the other keys are operated. Alternatively, the operation sound may be output only for a part of the various operations performed on the key operation unit, such as outputting the operation sound only during the CH switching operation. In addition, the application of the present invention is not limited to the FM transceiver at all, and the portable information terminal,
The present invention can be applied to various electric devices such as OA devices and game devices.

[0076]

According to the present invention, the power amplifying means is embodied using a differential amplifier, and an operation sound signal is inputted to one input terminal of the differential amplifier, and the power amplifier is connected between the other input terminal and the ground. Even when a capacitor is connected to the power amplifier, when a certain operation is performed, the power is supplied to the power amplifying unit first, and after a normal amplification operation is enabled, an operation sound signal is generated and the power is amplified. Since the input is made to the amplifying means, the operation sound output from the sound converting means does not become truncated, the user can always know that a certain operation has been performed, and keep the electric device in an inconvenient operation state. It will not be left unattended. In addition, if not so much time has passed since the power supply to the power amplifying means was last turned off and the charging voltage of the capacitor has not decreased so much, the power amplifying means is supplied to the power amplifying means when a certain operation is performed. When the power supply is supplied, the normal amplification operation can be performed immediately, but in this case, since the operation sound signal is input in a relatively short waiting time after the power is supplied to the power amplification means, the operation sound is input after the operation is performed. The delay time before the appearance is small, and no discomfort occurs.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an FM transceiver according to one embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation of a system controller in FIG. 1;

FIG. 3 is a flowchart showing an operation of the system controller in FIG. 1;

FIG. 4 is a flowchart showing an operation of the system controller in FIG. 1;

FIG. 5 is a flowchart showing the operation of the system controller in FIG. 1;

FIG. 6 is a flowchart showing an operation of the system controller in FIG. 1;

FIG. 7 is a flowchart showing the operation of the system controller in FIG. 1;

FIG. 8 is an explanatory diagram illustrating an operation sound generation operation in the FM transceiver of FIG. 1;

FIG. 9 is a flowchart according to a modification of the present invention.

FIG. 10 is a flowchart according to a modification of the present invention.

FIG. 11 is a flowchart according to another modification of the present invention.

FIG. 12 is a block diagram showing a configuration of a conventional FM transceiver.

FIG. 13 is a flowchart showing the operation of the system controller in FIG.

FIG. 14 is a flowchart showing an operation of the system controller in FIG. 12;

FIG. 15 is a flowchart showing the operation of the system controller in FIG.

FIG. 16 is a flowchart showing the operation of the system controller in FIG. 12;

FIG. 17 is a flowchart showing the operation of the system controller in FIG.

18 is an explanatory diagram illustrating an operation sound generation operation in the FM transceiver of FIG.

[Explanation of symbols]

Reference Signs List 10 microphone 20 transmission / reception circuit 33 summing amplifier 34 audio power amplifier 35 speaker 40 power supply circuit 41 key input section 42 power key 43 up key 44 down key 50A system controller PA-IC differential amplification type power amplifier C2 capacitor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-276528 (JP, A) JP-A-5-126332 (JP, A) JP-A 63-12914 (JP, U) JP-A 5-129332 57952 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04R 3/00 310 H04B 1/04 H04B 1/40 H04B 7/26

Claims (4)

(57) [Claims] 1. A power amplifying means for amplifying an audio signal;
An acoustic conversion unit for acoustically converting the output of the power amplifying unit, an operation unit for performing a predetermined operation on the electric device, and when a certain operation is performed by the operation unit, a control operation according to the operation is performed, and a power supply unit Control means for temporarily supplying power to the power amplifying means and generating an operation sound signal and inputting the operation sound signal to the power amplifying means, wherein the power amplifying means has an operation sound signal at a non-inverting input terminal. In an operation sound generating device for an electric device which is constituted by a differential amplifier in which a capacitor is connected between an inverting input terminal and an inverting input terminal, a certain operation has been performed since power supply to a power amplifying unit was turned off last time. Determining means for determining the length of time elapsed until the operation is performed; when a certain operation is performed by the operating means, the control means performs power supply on control to the power amplifying means in advance, and thereafter, An operation sound signal is generated at the time when the waiting time has elapsed, and at this time, the time elapsed from when the power supply to the power amplifying means was last turned off to the time when a certain operation was performed is determined by the determining means. An operation sound generating device for an electrical device, wherein the waiting time is changed in accordance with the length. 2. The control means treats an operation as a valid operation when a certain operation is continuously performed for a predetermined reference time or more by the operation means, and treats the operation as an invalid operation when the operation is stopped before the predetermined reference time elapses. When handling, when a certain operation is performed, the control unit performs power supply ON control to the power amplifying unit before the predetermined reference time elapses, and performs a predetermined operation after the certain operation is performed. If the operation is stopped before the reference time elapses, the power supply to the power amplifying means is controlled to be off, and the certain operation is continuously performed for a predetermined reference time or more, and the power supply to the power amplifying means is turned on. 2. The operation sound generating device for an electric device according to claim 1, wherein an operation sound signal is generated when the waiting time has elapsed since the control. 3. Power amplification means for amplifying an audio signal;
An acoustic conversion unit for acoustically converting the output of the power amplifying unit, an operation unit for performing a predetermined operation on the electric device, and when a certain operation is performed by the operation unit, a control operation according to the operation is performed, and a power supply unit Control means for temporarily supplying power to the power amplifying means and generating an operation sound signal and inputting the operation sound signal to the power amplifying means, wherein the power amplifying means has an operation sound signal at a non-inverting input terminal. In an operation sound generating device for an electric device, which is constituted by a differential amplifier in which a capacitor is connected between an inverting input terminal and an inverting input terminal, when a certain operation is performed by the operation means, the power amplification means at that time is operated. A determination means for determining the magnitude of the charging voltage of the capacitor is provided. When a certain operation is performed by the operation means, the control means performs power supply on control to the power amplification means in advance, and after that, An operation sound signal is generated when the waiting time elapses, and at this time, the waiting time is changed according to the magnitude of the charging voltage of the capacitor determined by the determining means, and the length of the waiting time is changed. Operation sound generator. 4. The control means treats a certain operation as a valid operation when the operation means is continuously performed for a predetermined reference time or more, and regards the operation as an invalid operation when the operation is stopped before the predetermined reference time has elapsed. When handling, when a certain operation is performed, the control unit performs power supply ON control to the power amplifying unit before the predetermined reference time elapses, and performs a predetermined operation after the certain operation is performed. If the operation is stopped before the reference time elapses, the power supply to the power amplifying means is controlled to be off, and the certain operation is continuously performed for a predetermined reference time or more, and the power supply to the power amplifying means is turned on. 4. The operation sound generating apparatus for an electric device according to claim 3, wherein an operation sound signal is generated when the waiting time has elapsed since the control.