Adaptive amplifier output common mode voltage adjustment

Details Adaptive amplifier output common mode voltage adjustment Adaptive amplifier output common mode voltage adjustment

2005-12-13

2005-12-13

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S260000, C330S255000

Reexamination Certificate

active

06975170

ABSTRACT:
The circuit with adaptive amplifier output common mode voltage adjustment includes: a differential pre-amplifier; a re-generated comparator having a differential input coupled to a differential output of the pre-amplifier; and a replica comparator coupled to a common mode node of the pre-amplifier for adjusting a common mode of the pre-amplifier. The replica comparator provides a trip-point reference to set the output common mode of the pre-amplifier. This sets the output common mode of the pre-amplifier to the most sensitive region of the re-generated comparator.

REFERENCES:
patent: 4105942 (1978-08-01), Henry
patent: 5361042 (1994-11-01), Gist
patent: 6034551 (2000-03-01), Bridgewater, Jr.
patent: 6081162 (2000-06-01), Johnson
patent: 6229273 (2001-05-01), Kelly et al.
patent: 6429700 (2002-08-01), Yang

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