JP3239105B2 - Power supply separable amplifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power-separable type amplifying device used for a joint receiving device of a CATV system.

[0002]

2. Description of the Related Art Conventionally, in a CATV system, as shown in FIG. 8, a television (TV) signal transmitted by a CATV network 1 is branched from a branching device 2, amplified by an amplifier 3, and then transmitted through a coaxial cable 4. The light is guided into the house 5 and distributed to, for example, four by the distributor 6 and input to the television receiver 7. The amplifier 3 compensates for a decrease in the level of the television signal distributed by the distributor 6 in the house 5, and operates on a commercial AC power supply (AC100V).

FIG. 9 shows another example of power supply to the amplifier 3. In this example, a power supply 8 is installed in the middle of the coaxial cable 4 indoors, and
Is converted to a DC voltage of +15 V, for example, and supplied to the amplifier 3 via the coaxial cable 4.

[0004]

As described above, when power is supplied to the amplifier 3 used in the co-receiver, FIG.
The power supply unit 8 is provided at a location (indoor) remote from the amplifier 3 as shown in FIG. 9 when operating with a commercial AC power supply of 100 V using a power supply unit built in the main body of the amplifier 3 as shown in FIG. , The commercial power supply 100 V
Is converted into a low voltage such as DC +15 V, and power is supplied to the amplifier 3. In particular, the method shown in FIG. 9 is used when a commercial AC power supply cannot be obtained nearby.
Power is supplied to

Therefore, when supplying power to the amplifier 3,
Conventionally, it is necessary to use two methods, that is, using a power supply unit built in the amplifier main body or supplying power from an external power supply unit 8.

[0006] For this reason, the amplifier 3
The power supply 8 must be prepared for operating the device from the outside, and inventory management is required for both of them, and the price is difficult to reduce.

[0007] In particular, since the contractor is on-site, the work always involves bringing a power supply, and the work such as checking the members is complicated. The present invention has been made to solve the above-mentioned problems, and can cope with either the case where the power supply of the amplifier is built in the main body or the case where the power is supplied from the outside, and can eliminate complicated inventory management and reduce cost. It is an object of the present invention to provide a power-separable amplifier device capable of reducing power consumption.

[0008]

According to the present invention, there is provided an amplifying device capable of separating power supply, comprising a case and a C provided in the case.
A first input / output terminal for ATV network connection and
A second input / output terminal for connecting the
And an amplifying unit that amplifies a high-frequency signal input to the first input / output terminal and outputs the amplified high-frequency signal to the second input / output terminal, and is detachably provided in the case . It is a power supply unit for obtaining a DC voltage from a commercial AC power source, the power supply unit between the power supply unit and the case in a state of being mounted on the case
Combines and amplifies the DC voltage output from the power supply
Connector for supplying power to the power supply unit
A third input / output terminal for voltage output;
And a fourth input / output terminal for connecting indoor equipment , wherein the power supply unit is detached from the case.
DC voltage output from the third input / output terminal
To the second input terminal of the amplifying section via
The power is supplied to the amplification section while being superimposed on the power line.
Power from the second input / output terminal of the width section via the cable
Extract the high frequency signal input to the third input terminal of the unit
The signal is output from a fourth input / output terminal of the power supply unit . Further, the amplifying section is connected to a second input / output terminal.
Selected upstream signal and transmits it to the first input / output terminal
The band pass filter and this band pass filter
Equipped with a cut switch to cut the transmitted upstream signal.
It is characterized by.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 show a configuration of a power-separable amplifier according to an embodiment of the present invention. FIG. 1 is a perspective view showing the entire configuration, and FIG. 2 is a perspective view showing an internal structure with an upper cover removed. FIG. 3 is a perspective view showing a state in which a power supply unit having a detachable structure is removed from a case main body. FIG. 4 is a perspective view showing a configuration of the power supply unit removed from the case main body.
Is a plan view showing a state where the power supply unit 16 is removed from the case main body, and FIG. 6 is a front view of the power supply unit in a state where the power supply unit is mounted on the case main body.

1 to 6, reference numeral 11 denotes a case, which comprises a case body 12 and a cover 13, and has a screw 10 for external attachment. The case 11 is vertically attached to, for example, a wall surface of a house by the above-mentioned attachment screw 10. For example, the cover 13 is rotatably supported on both sides on the upper end by a support member 14, and can be opened and closed by the rotation. The case body 12
, An amplifying unit (booster unit) 15 is fixedly attached to the lower end side, and a power supply unit 16 also serving as a power supply unit is detachably provided at the upper end side. That is, locking portions 17 having elastic force are provided on both left and right sides of the case of the power supply portion 16, and locking grooves 18 are provided on the case body 12 side at positions corresponding to the locking portions 17. When the power supply section 16 is mounted on the case body 12, the locking section 17 is fitted into the locking groove 18 by its elastic force so that the position is fixed.

The amplifying section 15 includes a case body 12.
Input / output terminals (connecting plugs) 20 and 21 are provided at the lower end side. The input / output terminal 20 is a terminal connected to the branching device 2 in FIGS. 8 and 9, and serves as an input terminal for a downstream signal transmitted by the CATV network 1 and an output terminal for an upstream signal. The input / output terminal 21 is a terminal to which the coaxial cable 4 in FIGS. 8 and 9 is connected, and serves as an input terminal for an up signal and an output terminal for a down signal.
Further, the input / output terminal 21 is connected to the power supply 16 by the case 11.
And also serves as a DC voltage (for example, +15 V) power receiving terminal when taken out from the power supply and used as a power supply.

The power supply unit 16 is provided with input / output terminals (plugs) 22 and 23. The above input / output terminal 2
Reference numerals 2 and 23 are used when the power supply unit 16 is detached from the case body 12 and operated as a power supply.
The input / output terminal 22 also serves as a television signal input terminal and a DC voltage (for example, +15 V) output terminal. Further, an AC 100 V cord 24 is connected to the power supply unit 16.

Further, the power supply section 16 has a concave portion 2 at the lower center.
5 and a connector, that is, a plug 26 as shown in FIGS.
And a jack 27, so that the DC voltage output from the power supply unit 16 is supplied to the amplification unit 15.

The power supply unit 1 is provided on the case body 12 side.
6, a plug 26 is provided at a position corresponding to the concave portion 25, and the plug 26 is connected to a power supply line of the amplification section 15 by, for example, a vinyl wire (not shown). On the other hand, the power supply unit 1
6, a jack 27 is provided above the recess 25 at a position facing the plug 26, as shown in FIG. The jack 27 is attached to a printed board 28 provided in the power supply unit 16 and the printed board 2
8 DC voltage output lines (not shown). The recess 25 is provided with a through hole 29 through which the pin 30 of the plug 26 is inserted.

In the above configuration, when the power supply unit 16 is mounted on the case main body 12, the through hole 2 provided in the recess 25 is provided.
It is positioned and mounted so that the pin 30 of the plug 26 is inserted into the plug 9. As a result, the plug 26 provided in the case main body 12 is fitted to the jack 27 of the power supply unit 16, and the DC voltage output from the power supply unit 16 is supplied to the power supply line of the amplification unit 15 via the jack 27 and the plug 26. Become so. In this case, the input / output terminal 22 and the input / output terminal 23 of the power supply unit 16 do not contact the case body 12 and other components.

Next, the circuit configuration of the amplifier 15 and the power supply 16 will be described with reference to FIG. First, the circuit configuration of the amplifier 15 will be described. In FIG. 7, reference numeral 20 denotes an input / output terminal of the amplifying unit 15 shown in FIGS. 1 to 3. The television signal input to the input / output terminal 20 includes a capacitor 31, a high-pass filter (HPF) 32, and a gain controller. (GC) 33, amplifiers 34 and 35, high-pass filter 36, and capacitor 37, and are sent to input / output terminal 21.

The power lines of the amplifiers 34 and 35 are connected to the plug 26. The input / output terminal 21 is connected to a choke coil 38 on the power supply lines of the amplifiers 34 and 35.
And a diode 39. That is, the DC power input to the input / output terminal 21 is
8 and the power supply line of the amplifiers 34 and 35 via the diode 39.

The upstream signal input to the input / output terminal 21 is supplied to a capacitor 37 and a band-pass filter (BPF).
The signal is sent to the input / output terminal 20 via the switch 41, the up cut switch 42, the band pass filter (BPF) 43, and the capacitor 31. The up cut switch 42 connects the resistor R between the lower terminal and the ground while the upper terminal in the drawing is an empty terminal, and when the switching terminal is switched to the terminal on the resistor R side, an uplink signal is transmitted, When the switching terminal is switched to the vacant terminal side, the upstream signal is cut off.

Next, the circuit configuration of the power supply section 16 will be described. The power supply unit 16 is connected to a commercial AC power
A power supply transformer 51 for stepping down to a voltage of 5V is provided. The output voltage of the power supply transformer 51 is rectified by a rectifier circuit 52, and further smoothed by a choke coil 53 to a DC voltage of, for example, 15V. 27. The input / output terminal 22 is connected to the input / output terminal 23 via the capacitor 54.

When the power supply separable amplifier configured as described above is installed, and when it can be connected to a commercial AC power source outdoors as shown in FIG. 8, the power source shown in FIGS. The unit 16 is installed outdoors with the case 16 attached to the case body 12, and the AC 100V cord 24 is connected to a commercial AC power supply. Then, the input / output terminal 20 is connected to the branching device 2 via a coaxial cable (not shown).
1 is connected to a distributor 6 in a house 5 by a coaxial cable 4. The television receiver 7 is connected to the distributor 6 as described above.

As described above, the power supply unit 16 is connected to the case body 12.
When attached to the case 2, the plug 2
6 and the jack 27 of the power supply unit 16 are coupled, and a DC voltage output from the jack 27 of the power supply unit 16 is supplied via the plug 26 to the amplifiers 34 and 35 of the amplification unit 15 as operating voltages. Therefore, the television signal input to the input / output terminal 20 of the amplifier 15 is amplified by the amplifier 15 and output from the input / output terminal 21, and the coaxial cable 4 and the distributor 6
Is sent to the television receiver 7 via.

When commercial AC power cannot be supplied to the power-separable amplifier installed outdoors, the power supply unit 16 is removed from the case body 12 as shown in FIGS. Are placed indoors as shown in FIG. 9 as a power supply and connected to a commercial AC power supply. Then, the input / output terminal 22 of the power supply unit 16 and the input / output terminal 21 of the amplification unit 15 are connected by the coaxial cable 4, and the input / output terminal 23 of the power supply unit 16 is connected to the distributor 6 by the coaxial cable.

As described above, the power supply unit 16 is connected to the case body 12.
When the power supply unit is detached and installed as a power supply, the DC voltage output from the input / output terminal 22 of the power supply unit 16 is supplied to the input / output terminal 21 of the amplification unit 15 via the coaxial cable 4. The DC voltage supplied to the input / output terminal 21 is
The power is supplied to the power supply lines of the amplifiers 34 and 35 via the choke coil 38 and the diode 39. Therefore, the television signal input to the input / output terminal 20 of the amplifier 15 is amplified by the amplifier 15 and output from the input / output terminal 21,
The signal is input to the input / output terminal 22 of the power supply unit 16 via the coaxial cable 4. The television signal input to the input / output terminal 22 is output from the input / output terminal 23 via the capacitor 54 and sent to the television receiver 7 via the distributor 6. As described above, the power supply unit 16 is connected to the case body 12.
Can be detached from the case body 12 and used as a power supply.

[0024]

As described above in detail, according to the present invention, the amplifying section is fixedly provided in the case and the power supply section is detachably provided. When the power supply section is mounted on the case, the power supply section is connected to the connector. DC power is supplied to the amplifier through the power supply, and when the power supply is removed from the case and used as a power supply, a DC voltage is superimposed on the signal line and supplied to the amplifier. It is possible to cope with either the case where the power supply of the amplifier is built in the main body or the case where the power is supplied from the outside, so that it is possible to eliminate complicated inventory management and reduce the cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of a power-separable amplifier according to an embodiment of the present invention.

FIG. 2 is an exemplary perspective view showing the internal structure of the embodiment with a cover removed;

FIG. 3 is an exemplary perspective view showing a state when the power supply unit is removed from the case main body according to the embodiment;

FIG. 4 is an exemplary perspective view showing the configuration of a power supply unit removed from the case body in the embodiment;

FIG. 5 is an exemplary plan view showing a state where the power supply unit is removed from the case main body according to the embodiment;

FIG. 6 is an exemplary front view of the power supply unit showing a state where the power supply unit is mounted on the case main body according to the embodiment;

FIG. 7 is a circuit configuration diagram of an amplification unit and a power supply unit according to the first embodiment.

FIG. 8 is a diagram showing an example of an arrangement configuration of a joint receiving device in a conventional CATV system.

FIG. 9 is a diagram showing another example of the arrangement configuration of the joint receiving device in the conventional CATV system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 external mounting screw 11 case 12 case main body 13 cover 14 support member 15 amplifying unit 16 power supply unit 17 locking unit 18 locking groove 20, 21 input / output terminal 22, 23 input / output terminal 24 AC100V cord 25 concave portion 26 plug 27 Jack 28 Printed board 29 Through hole 30 Plug pin

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Fujita 1406 Hasunuma, Omiya City, Saitama Prefecture Yagi Antenna Co., Ltd. Omiya Plant (56) References Real Opening Sho57-2741 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) H04N 5/00 H04N 5/50-5/63 H04N 7/14-7/173 H04B 1/08 H04B 1/18-1/24

Claims (2)

(57) [Claims] 1. A case and a CA provided in the case
A first input / output terminal for connecting to a TV network and provided in the case.
The second input / output terminal for connecting the indoor equipment
Provided to the scan, an amplification section for amplifying and outputting the high frequency <br/> wave signal inputted to the first input-output terminal to the second input terminal, provided detachably in said case It is, coupled between the power supply section to obtain a DC voltage from a commercial AC power source, and the power supply unit and the case in a state where the power supply unit is mounted in the case,
Supplying a DC voltage output from the power supply unit to the amplifier unit
A connector for a power supply voltage output provided to the power supply unit
A third input / output terminal for indoor use provided in the power supply unit;
A fourth input / output terminal for connecting a device, and in a state where the power supply unit is detached from the case, a DC voltage output from the third input / output terminal of the power supply unit is connected to a cable.
Input to the second input terminal of the amplifier through the
It is superimposed on the output line and supplied to the amplifier, and
Power is supplied from the second input / output terminal of the amplification section via the cable.
Extracts the high-frequency signal input to the third input terminal of the source unit
A power-separable amplifier device that outputs the signal from a fourth input / output terminal of the power supply unit. 2. The amplifying section according to claim 1, wherein said amplifying section is connected to a second input / output terminal.
Selected upstream signal and transmits it to the first input / output terminal
The band pass filter and this band pass filter
Equipped with a cut switch to cut the transmitted upstream signal.
The power supply separable type increase according to claim 1, characterized in that:
Width equipment.