Method and apparatus for calibration of a time interleaved ADC
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United States of America Patent
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Jan 3, 2017
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app pub date -
Sep 18, 2015
filing date -
Apr 1, 2014
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Abstract
A system for calibrating time interleaved ADCs is disclosed and may include a time interleaved analog-to-digital converter (ADC) for converting analog signals to digital signals, the time interleaved ADC comprising: a plurality of active slices, and a plurality of reference slices, each reference slice associated with a corresponding one of the plurality of active slices. An output of each reference slice may be used to correct distortion in an output of the corresponding active slice. Each active slice may sample an input signal at a first rate and each associated reference slice may sample the input signal at a second rate, the second rate being slower than the first rate. Each sample taken by one of the plurality of reference slices may then be taken concurrent with a sample taken by the associated active slice. Each reference slice may include a reference sampling module and a dummy load.
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