Low power reference voltage circuit

Details Low power reference voltage circuit Low power reference voltage circuit

2006-08-09

2008-10-28

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S530000

Reexamination Certificate

active

07443231

ABSTRACT:
A circuit for providing a reference voltage includes a bandgap reference circuit, the bandgap reference circuit providing a first reference voltage and a data storage. The data storage stores a digital value corresponding to the first reference voltage. A digital to analog converter is coupled to the data storage for providing a second reference voltage corresponding to the digital value. The circuit also includes an output switch circuit responsive to at least one control signal, the output switch circuit providing either the first reference voltage or the second reference voltage to an output node responsive to the control signal.

REFERENCES:
patent: 5220273 (1993-06-01), Mao
patent: 5283762 (1994-02-01), Fujishima
patent: 5909142 (1999-06-01), Kawasaki et al.
patent: 6111394 (2000-08-01), Casper
patent: 6339357 (2002-01-01), Yamasaki et al.
patent: 6788131 (2004-09-01), Huang
patent: 6859067 (2005-02-01), Yamamoto
patent: 7218168 (2007-05-01), Rahman
patent: 7230473 (2007-06-01), Tadeparthy et al.

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