Adaptive equalizer circuit
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United States of America Patent
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Oct 27, 1998
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N/A
app pub date -
Aug 5, 1993
filing date -
Aug 5, 1993
priority date (Note) -
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Abstract
An adaptive equalizer is configured to reconstruct electronic signals which are transmitted over signal cables, such as twisted pair cables. The equalizer satisfactorily reconstructs the signals over a broad range of cable lengths. The degradation characteristics of a signal cable varies with cable length. Using the degradation characteristics for a cable over a desired range of lengths, the adaptive equalizer includes multiple parallel paths each of which are configured to reconstruct the input voltage signal optimized for a particular cable length. The degraded input signal is split according to a predetermined relationship into multiple partial signals, each signal for transmission through one each of the paths. Though each path is optimized to reconstruct the signal for a particular length of cable, the adaptive control adds a function of the actual cable length for more accurately reconstructing the signal. Each path forms a partial reconstructed signal. In the preferred embodiment, there are two paths, one of which does not modify its partial signal. The partial signals from each path are summed to form a composite reconstructed signal.
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