Simplified and effective offset calibration circuit for RxLOS in serdes
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United States of America Patent
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Sep 13, 2016
Grant Date -
Oct 29, 2015
app pub date -
May 16, 2014
filing date -
Apr 28, 2014
priority date (Note) -
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Abstract
A method for offset cancellation in a receiver loss of signal (RxLOS) circuit of a serializer/deserializer (SerDes) receiver device includes receiving a differential input signal via the first stage of a peak detector cell of the RxLOS circuit and shorting the differential output of the first stage via a control switch of the second stage of the RxLOS circuit. The control switch may further transition the RxLOS circuit from normal operating mode to an offset cancellation mode wherein the control switch may manually or automatically short the differential output of the first stage.
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