Channel equalization in data receivers
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United States of America Patent
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Sep 9, 2008
Grant Date -
Feb 6, 2003
app pub date -
Jul 31, 2002
filing date -
Aug 2, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
Channel equalization in a 1000BASE-T receiver is performed by a fixed mode analog filter 2 suitable for the longest possible cable length, by a FFE (3), and by a digital filter 4. The digital filter (4) has two sets of taps. One set is optimal for shorter cable lengths and so cancels adaptation for long cable lengths and assists operation of the analog filter. A decision block (5) selects an appropriate set of taps.
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