Method for offset compensation of a switched-capacitor amplifier and switched capacitor amplifier arrangement
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United States of America Patent
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Oct 8, 2013
Grant Date -
Mar 22, 2012
app pub date -
Aug 24, 2011
filing date -
Aug 24, 2010
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Abstract
A method for offset compensation of a switched-capacitor amplifier comprises a reset phase (φ1) and at least one working phase (φ2). An output voltage (Vout) of the amplifier (amp) is fed according to a damped feedback loop gain (AB(1)) to a first amplifier input (ain1) in the reset phase (φ1) as a function of an offset voltage (Voff). In the least one working phase (φ2), an offset of the amplifier (amp) is compensated as a function of the offset voltage (Voff) by superimposing the output voltage (Vout) onto an input voltage (Vin) of the amplifier (amp) according to a loop gain (AB(2)).
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