Multi-input differential amplifier with dynamic transconductance compensation
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United States of America Patent
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Feb 4, 2014
Grant Date -
Feb 28, 2013
app pub date -
Feb 9, 2012
filing date -
Aug 29, 2011
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Abstract
A multi-input differential amplifier with dynamic transconductance compensation is disclosed. The multi-input differential amplifier includes an input stage, an output stage and a transconductance compensation circuit. The input stage includes a plurality of differential input pairs, which includes a first differential input pair, a second differential input pair, a third differential input pair and a fourth differential input pair, for generating a pair of differential signals according to a first input signal, a second input signal, a third input signal, a fourth input signal, and an output signal. The output stage is utilized to generate the output signal in response to the pair of differential signals. The transconductance compensation circuit is coupled between the first and the second differential input pair, for compensating a first transconductance of the first differential input pair and a second transconductance of the second differential input pair.
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