Serial data link using decision feedback equalization
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United States of America Patent
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Oct 21, 2008
Grant Date -
May 4, 2006
app pub date -
Nov 1, 2004
filing date -
Nov 1, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multi-phase adaptive decision feedback equalizer minimizes post-cursor inter-symbol interference in a current data bit based on values of subsequent data bits in a data communication system. In one form, the receiver includes a plurality of modules each having a respective adaptive decision feedback equalizer. A processor responsive to output signals from each of the plurality of modules generates a plurality of coefficient values. The adaptive decision feedback equalizer has a plurality of taps receiving a respective output signal from one of the modules and a respective coefficient value to generate a respective correction signal. The correction signals are summed with the data signal and processed to recover the data. Pre-calculation of coefficients permits rapid selection of data. Multi-phase operation permits higher data frequencies.
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