Commutating auto zero amplifier

Details Commutating auto zero amplifier Commutating auto zero amplifier

2011-03-15

2011-03-15

Nguyen, Khanh V (Department: 2817)

Amplifiers

With periodic switching input-output

C330S051000

Reexamination Certificate

active

07907007

ABSTRACT:
A commutating auto zero amplifier system, comprises a first amplifier (A1), a second amplifier (A2) and a switching arrangement which defines a two phase operation, with one amplifier in an output mode providing the output and the other amplifier in a zeroing mode during each phase. A capacitor arrangement (Cof1.Cot1) stores offset voltages, a buffer amplifier (B) couples the output from the amplifier in the output mode to an input of the amplifier in the zeroing mode. This eliminates voltage swings at the output of an amplifier as it switches between modes of operation.

REFERENCES:
patent: 3988689 (1976-10-01), Ochi et al.
patent: 6087897 (2000-07-01), Wang
patent: 6476671 (2002-11-01), Tang
patent: 6498530 (2002-12-01), Tang
patent: 7336124 (2008-02-01), Kasai et al.
patent: 2006/0197574 (2006-09-01), Naviasky et al.

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