Amplifier, a residue amplifier, and an ADC including a residue amplifier
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United States of America Patent
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Jan 5, 2016
Grant Date -
Sep 11, 2014
app pub date -
Mar 6, 2013
filing date -
Mar 6, 2013
priority date (Note) -
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Abstract
An amplifier, comprising: an input node; an output node; a gain stage having a gain stage inverting input, a gain stage non-inverting input and a gain stage output; a feedback capacitor connected in a signal path between the gain stage output and the gain stage inverting input; a sampling capacitor connected between the input node and the gain stage inverting input, and a controllable impedance in parallel with the feedback capacitor, wherein the controllable impedance is operable to switch between a first impedance state in which it does not affect current flow through the feedback capacitor, and a second impedance state in which it cooperates with the feedback capacitor form a bandwidth limiting circuit.
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