Constant voltage supplying circuit

Details Constant voltage supplying circuit Constant voltage supplying circuit

1995-03-09

1997-03-25

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

327538, G05F 316

Patent

active

056148151

ABSTRACT:
A constant voltage supplying circuit is disposed between a voltage output terminal of a voltage generation circuit for outputting a voltage having the same polarity as that of a reference voltage, which can be arbitrarily set, and having a greater absolute value than the reference voltage, and a load. This constant voltage supplying circuit includes a first field effect transistor a gate of which is connected to its drain, and to a source of which the reference voltage is supplied, and a second field effect transistor which has the same conductivity type as the first field effect transistor, a gate of which is connected to the drain of the first field effect transistor, a source of which is connected to the voltage output terminal of the voltage generation circuit, and a drain of which is connected to the ground. According to the circuit constitution, the output voltage of the voltage generation circuit can be stabilized to a desired voltage value (the same voltage value as the reference voltage). Even when the constant voltage supplying circuit is fabricated in an integrated circuit, it does not invite the increase of the production process, and thus can limit the increase of the cost of production.

REFERENCES:
patent: 4499416 (1985-02-01), Koike
patent: 4692689 (1987-09-01), Takemae
patent: 4814686 (1989-03-01), Watanabe
patent: 5258703 (1993-11-01), Pham et al.
patent: 5315230 (1994-05-01), Cordoba et al.
patent: 5532578 (1996-07-01), Lee
patent: 5545977 (1996-08-01), Yamada et al.

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