Comparator circuit having a calibration circuit
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United States of America Patent
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Aug 22, 2017
Issued Date -
N/A
app pub date -
Feb 9, 2015
filing date -
Mar 15, 2012
priority date (Note) -
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Abstract
A comparator circuit includes a comparator, a first selection circuit, and a switched-capacitor circuit. The comparator has a first terminal, a second terminal, and an output terminal. The comparator is configured to generate an output signal at the output terminal based on a first signal on the first terminal and a second signal on the second terminal. The first selection circuit is coupled with the first terminal of the comparator and configured to selectively set a first input signal or a first calibration signal as the first signal in response to a control signal. The switched-capacitor circuit is coupled with the output terminal and the second terminal of the comparator. The switched-capacitor circuit is configured to adjust and output the second signal based on the output signal.
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