Apparatus for biasing a complementary metal-oxide semiconductor differential amplifier
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United States of America Patent
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Aug 5, 2008
Grant Date -
Dec 6, 2007
app pub date -
Jun 2, 2006
filing date -
Jun 2, 2006
priority date (Note) -
Expired
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Abstract
A bias generation circuit for biasing a differential amplifier is disclosed. The bias generation circuit is coupled to the differential amplifier. After determining a common-mode voltage of a pair of differential outputs from the differential amplifier, the bias generation circuit generates a bias voltage, which is proportional to the determined common-mode voltage, to the differential amplifier such that the common-mode input voltage range of the differential amplifier is extended to as far as the rail-to-rail voltage.
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