Offset fixing operational amplifier circuit

Details Offset fixing operational amplifier circuit Offset fixing operational amplifier circuit

2008-05-28

2010-02-23

Choe, Henry K (Department: 2817)

Amplifiers

With periodic switching input-output

C330S261000

Reexamination Certificate

active

07667536

ABSTRACT:
In an offset fixing operational amplifier circuit, an operational amplifier circuit includes an input stage containing a first constant current source, a second constant current source, a first differential pair and a second differential pair. A bias circuit supplies a bias voltage to the operational amplifier circuit. An offset fixing circuit controls the input stage in accordance with an input voltage of the operational amplifier circuit.

REFERENCES:
patent: 6140872 (2000-10-01), McEldowney
patent: 6380801 (2002-04-01), McCartney
patent: 6825721 (2004-11-01), Sanchez et al.
patent: 6828856 (2004-12-01), Sanchez et al.
patent: 08-204468 (1996-08-01), None

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