Partial response decision feedback equalizer with selection circuitry having hold state
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United States of America Patent
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Aug 30, 2016
Grant Date -
Apr 16, 2015
app pub date -
Dec 18, 2014
filing date -
Jun 25, 2012
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Abstract
A partial response decision feedback equalizer (PrDFE) includes a receiver including at least first and second comparators operative to compare an input signal representing a sequence of symbols against respective thresholds and to respectively generate first and second receiver outputs. A first selection stage is provided to select (a) between the first comparator output and a first resolved symbol according to a first timing signal, and (b) between the second comparator output and the first resolved symbol according to the first timing signal, to produce respective first and second selection outputs. A second selection stage selects between the first and second selection outputs according to a selection signal. The selection signal is dependent on a prior resolved symbol that precedes the first resolved symbol in the sequence.
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