Operational amplifier having DC offset cancellation capability

Details Operational amplifier having DC offset cancellation capability Operational amplifier having DC offset cancellation capability

2011-08-16

2011-08-16

Mottola, Steven J (Department: 2817)

Amplifiers

Sum and difference amplifiers

C330S258000

Reexamination Certificate

active

07999612

ABSTRACT:
An operational amplifier includes an input stage for generating a first differential output signal pair according to a first differential input signal pair, an output stage for generating a second differential output signal pair according to at least a second differential input signal pair, and a high-pass filtering circuit coupled between the input stage and the output stage for performing high-pass filtering on the first differential output signal pair, for generating the at least a second differential input signal pair.

REFERENCES:
patent: 7808317 (2010-10-01), Cui et al.
patent: 7839212 (2010-11-01), Huang et al.

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