Compact voltage regulator with high supply noise rejection

Details Compact voltage regulator with high supply noise rejection Compact voltage regulator with high supply noise rejection

1999-08-20

2000-11-07

Riley, Shawn

Electricity: power supply or regulation systems

Self-regulating

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

323280, G05F 316

Patent

active

061441953

ABSTRACT:
An embodiment of the invention is directed to a voltage regulator that provides a conditioned reference voltage with high supply noise rejection. A reference circuit provides an input reference voltage. An operational amplifier (opamp) has a first opamp input coupled to the reference circuit, a second opamp input, and an opamp output to provide the conditioned reference voltage based on the input reference voltage. A differential MOS amplifier has a first input coupled to the opamp output and an output coupled to the second opamp input. The reference voltage is conditioned in accordance with the size of transistors in the differential amplifier. The voltage regulator may be used in different types of analog-to-digital converters, including those built for use with camera chips.

REFERENCES:
patent: 4954769 (1990-09-01), Kalthoff
patent: 5061862 (1991-10-01), Tamagawa

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