Low voltage regulator with summing circuit

Details Low voltage regulator with summing circuit Low voltage regulator with summing circuit

1995-01-11

1996-04-16

Nelms, David C.

Electricity: power supply or regulation systems

Self-regulating

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

323316, 327538, 327540, 36518909, G05F 324

Patent

active

055086047

ABSTRACT:
A band gap voltage reference circuit operates between a positive supply voltage and ground. The inputs to a difference amplifier of the band gap reference circuit are biased above the voltage drop of the base-emitter junctions of the band gap reference. The bias voltage is then subtracted from the difference amplifier output by a second difference amplifier. In addition, a bootstrap circuit assures a nonzero output from the first difference amplifier. Other embodiments wherein the band gap reference circuit is more generally a summing circuit are disclosed.

REFERENCES:
patent: 4443753 (1984-04-01), McGlinchey
patent: 4928056 (1990-05-01), Pease
patent: 5051686 (1991-09-01), Schaffer
patent: 5119015 (1992-06-01), Watanabe
patent: 5229710 (1993-07-01), Kraus et al.
patent: 5268871 (1993-12-01), Dhong et al.
Kuijk, Karel E., "A precision Reference Voltage Source," Jun. 1973, IEEE Journal of Solid State Circuits, vol. SC-6 No. 3, pp. 222-226.
Vittoz, Eric A., "A Low-Voltage CMOS Bandgap Reference," Jun. 1979, IEEE Journal of Solid State Circuits, vol. SC-14, No. 3, pp. 573-577.
Ye R. and Tsividis, Y., "Bandgap Voltage Reference Sources in CMOS Technology," Electronic Letters Jan. 7, 1982 vol. 18 No. 1 pp. 24-25.

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