Switched capacitor circuit with inverting amplifier and offset unit
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United States of America Patent
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Sep 21, 2010
Grant Date -
May 22, 2008
app pub date -
Nov 21, 2007
filing date -
Nov 21, 2006
priority date (Note) -
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Abstract
A switched capacitor circuit includes an amplifier, a charging unit, an offset unit, and an integrating unit. The charging unit is coupled between an input node and a first node, and is for accumulating charge corresponding to an input signal during a sampling mode. The offset unit is coupled between the first node and an input of the amplifier, and is for maintaining the first node to be a virtual ground during an integrating mode. The integrating unit is coupled between the first node and an output of the amplifier, and is for receiving charge from the charging unit during the integrating mode.
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