COMMON MODE INPUT CONTROL FOR SWITCHED CAPACITOR AMPLIFIER IN PIPELINE ANALOG-TO-DIGITAL CONVERTER
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United States of America Patent
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Issued Date -
Oct 3, 2013
app pub date -
Apr 5, 2013
filing date -
Aug 17, 2011
priority date (Note) -
Abandoned
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Abstract
A common mode bias circuit may include a weak common mode bias generator and a common mode bias capacitance. During a first state of the common mode bias circuit, the weak common mode bias generator may be coupled to the common mode bias capacitance and may impart to them a predefined common mode signal level. During a second state of the common mode bias circuit, the common mode bias capacitance may be coupled to differential inputs of an amplifier in a manner that establishes an input common mode level for the amplifier.
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