JPS5844246B2 - semiconductor equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a semiconductor device, and more particularly to a semiconductor device having a constant voltage circuit that supplies a stable voltage regardless of fluctuations in voltage supplied by a battery or the like.

Silver oxide batteries and the like are used as power supply sources for electronic devices that do not use commercial power.

Silver oxide batteries or mercury batteries have extremely good discharge characteristics, so electronic devices that use such batteries usually have
Many of them do not have a circuit to stabilize the supplied electric distortion.

On the other hand, although the above-mentioned batteries have good discharge characteristics, they have low energy density and are difficult to use for a sufficiently long period of time.

In place of such batteries, for example, lithium batteries with high energy density or solar batteries that use solar energy have been proposed, but these batteries have relatively large voltage fluctuations, and lithium batteries have The electromotive force is 2.
It is a high voltage of 8■.

When using such a high energy density battery, the semiconductor device is required to operate stably regardless of the battery voltage, and in order to extend the usage time,
Avoid operating circuits at higher voltages than necessary.

The present invention includes a plurality of constant voltage circuits that supply optimal voltages to each electronic circuit so that the electronic circuit operates stably against voltage fluctuations in lithium batteries, etc. is a semiconductor device that is configured to supply the output of a constant voltage circuit with a high output voltage that supplies voltage to an electronic circuit with a high operating voltage level, and is capable of reducing power consumption. Hereinafter, the details will be explained based on the illustrated embodiments.

In FIG. 1 showing an embodiment of a semiconductor device according to the present invention, reference numeral 1 denotes a constant voltage circuit with a high output voltage, and a battery 2 such as a lithium battery is connected to the constant voltage circuit 1 to supply power. being done.

The high constant voltage output from the constant voltage circuit 2 is supplied as an optimum voltage to the electronic circuit 3 having a high operating voltage level, and the constant voltage circuit has a lower output voltage than the output voltage of the constant voltage circuit 1. 4.

The output of the constant voltage circuit 4 is an electronic circuit 5 with a low operating voltage level.
is supplied as the optimum voltage.

FIG. 2 is a circuit diagram showing a specific example of the constant voltage motor circuit 1 in FIG. 1 and the electronic circuit 3 to which its output chief is supplied.
The constant voltage circuit 1 is a P-channel MOS whose gate is grounded.
Transistor (hereinafter referred to as P-MO8T) 6 and P
-P-M whose source is connected to the drain of MO8T 6
O8T7, an N-channel MOS transistor (hereinafter referred to as N-MO8T) 8 whose drain and gate are commonly connected to the drain and gate of P-MO8Tγ, and N-
A diode 9 whose cathode is connected to the source of MO8T8 and whose cathode is grounded, and a bipolar transistor (hereinafter simply referred to as a transistor) whose base is connected to the drain of P-MO8T6 and the source of P-MO8T7. 10, P-MO8T6
A battery 2 is connected to the source of the transistor 10 and the collector of the transistor 10.
Voltage is supplied from.

On the other hand, the electronic circuit 3 whose operating voltage level is higher than that of the electronic circuit 5 is, for example, as shown in the figure, P-MO8TI 1.
Inverter 1 from 12 and N-MO8T13.14
It consists of 5.

The constant voltage circuit 1 having such a configuration includes P-MO8T7,
A predetermined reference voltage is generated by N-MO8T8 and diode 9, and inverter 15 is generated by transistor 10.
Supply constant voltage to.

Further, the impark 15 is supplied with the above-mentioned constant voltage and performs a predetermined operation.

Incidentally, each of the elements 6 to 10 constituting the constant voltage circuit 1 and the inverter 15 constituting the electronic circuit 3 are formed on the same substrate.

Therefore, P-MO8T7 and P-MO8T12 and N-
The threshold voltages of MO8T8 and N-MO8T13 can be made equal, and constant voltage circuit 1 can supply electronic circuit 3 with the optimum operating voltage for operating inverter 15 with minimum power.

FIG. 3 is a circuit diagram showing a specific example of the constant voltage circuit 4 and the electronic circuit 5 in FIG. 1. The constant voltage circuit 4 has the same circuit configuration as the constant voltage circuit 1 shown in FIG. ing.

That is, P-MO8T16. 17, N-MO8T1
8.19 and a transistor 20.

The threshold voltage of each of the elements 16 to 20 constituting the constant voltage circuit 1 is set lower than that of each of the elements 6 to 10 of the constant voltage circuit 1 using, for example, ion implantation.

Moreover, the electronic circuit 5 is P-MO8T21.22, N-M
The oscillation circuit 31 includes an inverter 25 connected to the O8T23, 24, an N-MO8T26 connected to its input/output side, a resistor 27, a crystal oscillator 28, and capacitors 29, 30.

P-MO8T21.22 constituting the above inverter 25
．． N-MO8T23.

The threshold voltage of 24 and N-MO8T26 is
It is designed to be equal to the threshold voltage of each element 16 to 20 of the constant voltage circuit 4.

Therefore, the voltage supplied from the constant voltage circuit 1 causes the constant voltage circuit 4 to output a constant voltage that is lower than the above voltage and close to the operating voltage of the oscillation circuit 31.

Therefore, since the oscillation circuit 31 is supplied with a doubly stabilized voltage, the oscillation circuit 31 performs extremely stable operation regardless of fluctuations in battery voltage.

In addition, since the configuration includes a constant voltage circuit 4 that outputs an even lower voltage using the output of the constant voltage circuit 1, it is possible to use a system that includes constant voltage circuits that each obtain a different constant voltage using the battery voltage. In comparison, unnecessary power consumption, that is, power consumption of each constant voltage circuit itself can be reduced.

In addition, in addition to the electronic circuit 3, the constant voltage circuit 4 and the electronic circuit 5 are connected to the constant voltage circuit 1 as load circuits, so it is desirable to increase the current amplification factor of the transistor 10 of the constant voltage circuit 1. For example, by increasing the impurity concentration in the collector region of the transistor 10 to reduce the depletion layer capacitance between the pace collectors, or by decreasing the impurity concentration in the base region to lengthen the lifetime of carriers in the base region. realizable.

Further, this can be implemented similarly for the transistor 20.

An embodiment of the semiconductor device according to the present invention has been illustrated above,
Although the details have been explained above, it is also possible to configure it as shown in FIG. 4, for example.

That is, three electronic circuits 32 with different operating voltage levels
．． For 33°34, constant voltage circuits 35, 36, 3, respectively.
7, and in the constant voltage circuit 35, the battery type EV of the battery 38
.

is supplied, and outputs a first constant voltage EV, which is supplied to the electronic circuit 32 and also supplied to the constant voltage circuit 36.

The constant voltage circuit 36 outputs a second constant voltage (2) and supplies it to the electronic circuit 33 and the constant voltage circuit 37.

The constant voltage circuit 37 outputs the third constant voltage rIEV3 and supplies it to the electronic circuit 34.

In addition, each of the above-mentioned densho is ■o〉■1 〉■2〉■3 It can be understood that the relationship is as shown in .

Further, FIG. 5 is a diagram showing still another embodiment, in which the battery 39
It is equipped with a constant voltage circuit 40 to which electric power EV1o is supplied.

The constant voltage EV11 outputted from the constant voltage circuit 40 is supplied to the electronic circuit 41 and the constant voltage circuits 42 and 43, and the constant voltage 12 outputted from the constant voltage circuit 42 is supplied to the electronic circuit 44 and the constant voltage circuit 43. The constant voltage E V 13 outputted from is supplied to the electronic circuit 45, respectively.

It will be appreciated that the illustrated embodiment is particularly advantageous if the operating voltage levels of the electronic circuits 44, 45 are close.

Although the present invention has been described above in detail based on the illustrated embodiments, the present invention is not limited to the illustrated embodiments, and various changes and improvements can be made.

For example, in the embodiment, the constant voltage circuits 1 and 4 are composed of MOS transistors, bipolar transistors, and diodes, but if necessary, all the elements can be MOS transistors or bipolar transistors. It is not limited to the oscillation circuit 31 or the inverter 15, but also other gate circuits and flip-flop circuits 1. This includes a drive circuit, etc.

In addition, when generating reference electrostriction, a threshold controller is used, but a control module above the threshold,
This is not limited to ion implantation, and can be performed by changing the gate film thickness or the concentration of the P well, or other elements that generate Zener electrons may be used.

As described above, the semiconductor device according to the present invention has a configuration in which the output of the constant voltage circuit with a higher output load is supplied to a constant voltage circuit with a lower output load. The electrostriction supplied to the circuit is doubly stabilized, making it stable regardless of fluctuations in battery electrostriction, making it easy to use lithium batteries or solar cells. Compared to a device with multiple constant voltage circuits that receive power directly from It becomes easier to adopt electronic circuits that are influenced by electrical discharge characteristics, and it also becomes possible to use power sources with relatively poor discharge characteristics, so that the intended purpose can be fully achieved.
It has a great effect on implementation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a semiconductor device according to the present invention, FIG. 2 is a circuit diagram showing a specific example of one constant voltage circuit and an electronic circuit in FIG. 1, and FIG. FIG. 4 is a block diagram showing another embodiment according to the present invention, and FIG. 5 is a block diagram showing still another embodiment of the semiconductor device. It is. 1.4, 35, 36, 37, 40, 42, 43...constant voltage circuit, 2,3B, 39...battery, 3,5°32.
33, 34, 41.44.45...Electronic circuit, 6-8
... MOS transistor forming part of constant voltage circuit 1, 15... Inverter forming part of electronic circuit 3, 31
...An oscillation circuit included in the electronic circuit 5.

Claims (1)

[Claims] 1 A first constant voltage positive circuit 1 connected to a power source, a first electronic circuit 3 connected to this first constant voltage circuit 1, and an output of this first constant voltage positive circuit 1 are inputted to the first constant voltage positive circuit 1. a second constant voltage circuit 4 for outputting a constant voltage lower than that of the voltage circuit 1;
A second electronic circuit 5 connected to the constant voltage circuit 4 and operated at a voltage lower than that of the first electronic circuit 1 and operated at the same threshold voltage as the second constant voltage positive circuit 4; MOS transistors 6, 7 and 8, a diode 9, and a bipolar transistor 10 as a switching element;
The OS inverter 15, the three MOS transistors 16, 17, and 18 provided in the second constant voltage positive circuit 4, the diode 19, the bipolar transistor 20 as a switching element, and the MOS provided in the second electronic circuit 5.
An oscillation circuit 31 made of a transistor, and the inverter 15 is configured to operate at a higher voltage than the oscillation circuit 31.