Decision feedback equalizer
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United States of America Patent
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May 23, 2017
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app pub date -
Nov 11, 2015
filing date -
Feb 23, 2010
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Abstract
A decision-feedback equalizer (DFE) samples an analog input signal against M references during the same symbol time to produce M speculative samples. Select logic in the DFE then decodes N bits resolved previously for previous symbol times to select one of the M speculative samples as the present resolved bit. The present resolved bit is then stored as the most recent previously resolved bit in preparation for the next symbol time. The select logic can be can be programmable to accommodate process, environmental, and systematic variations.
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