Pulse or digital communications – Equalizers – Automatic
Patent
1993-08-05
1998-10-27
Chin, Stephen
Pulse or digital communications
Equalizers
Automatic
375257, 3647242, 333 28R, H03H 730, H03H 740
Patent
active
058287000
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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Chin Stephen
Micro Linear Corporation
Webster Bryan
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