Linear programmable switch-capacitance gain amplifier
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United States of America Patent
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Dec 29, 2009
Grant Date -
Dec 4, 2008
app pub date -
Jan 23, 2008
filing date -
Jun 1, 2007
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Abstract
A linear programmable switch-capacitance gain amplifier (PGA) is described. The PGA divides the dB-gain curve into several parts by the concept of piece-wise linearity, and then simultaneously executes the dB-linear gain adjustment of MSB and the LSB at the same gain stage. Present invention achieves the PGA dB-linearity by setting up every capacitance of the sampling capacitor array and the holding capacitor array, then arranging the sampling capacitor array and the holding capacitor array by coordinating the switching of the capacitor switches.
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