Low-constant voltage supply circuit

Details Low-constant voltage supply circuit Low-constant voltage supply circuit

1995-10-20

1997-09-23

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323315, G05F 316, G05F 320

Patent

active

056708688

ABSTRACT:
A constant-voltage power source circuit includes a first current mirror circuit having a diode and a first transistor and a second current mirror circuit having at least second and third transistors, which sets a current flowing to the first current mirror circuit to be substantially equal to a current flowing to the second mirror circuit, and provides the current flowing to the second current mirror circuit to a fourth transistor that determines an output voltage. With this arrangement, a current flowing to the current mirror circuits structured by the diode and transistors is determined by a forward characteristic of the diode, and this current becomes a constant current which is hardly affected by a variation of a power source voltage. When this current flows to the two current mirror circuits including transistors and then flows to the transistor which determines an output voltage, it is possible to hold a voltage between the base and the emitter of the transistor which determines an output voltage, at substantially a constant value without being affected by a variation of the power source voltage.

REFERENCES:
patent: 5349286 (1994-09-01), Marshal et al.
patent: 5381083 (1995-01-01), Inamori et al.
patent: 5521544 (1996-05-01), Hatanaka
patent: 5530340 (1996-06-01), Hayakawa et al.
Analog IC Design Technology for LSI, vol. 1 (1990), p. 275, by P.R. Grey and R.G. Mayer.

Affiliated with

Also associated with

Rating

Low-constant voltage supply circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low-constant voltage supply circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-constant voltage supply circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1939735