Device and method of eliminating DC offset

Details Device and method of eliminating DC offset Device and method of eliminating DC offset

2006-09-28

2008-12-16

Pascal, Robert (Department: 2817)

Amplifiers

With periodic switching input-output

C330S259000, C327S307000

Reexamination Certificate

active

07466193

ABSTRACT:
A DC offset elimination device includes a first signal path that delivers a differential input signal pair from an input node to an output node and a second signal path that delivers a differential output signal pair from the output node to the input node. The second signal path includes a first transconductor having an input terminal coupled to the output node, an amplifier having an input terminal coupled to an output terminal of the first transconductor, a capacitor coupled in parallel to the amplifier, and a second transconductor coupled to the output terminal of the amplifier and to the input node.

REFERENCES:
patent: 6509777 (2003-01-01), Razavi et al.
patent: 6992526 (2006-01-01), Cheng
patent: 7043206 (2006-05-01), Herdey et al.
patent: 7146141 (2006-12-01), Chen
patent: 2005/0110550 (2005-05-01), Shi et al.
patent: 2003-229918 (2003-08-01), None

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