Adaptive equalizer circuit including multiple equalizer units

Details Adaptive equalizer circuit including multiple equalizer units Adaptive equalizer circuit including multiple equalizer units

1995-10-27

1997-09-23

Lee, Benny T.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

333 28R, 375232, H04B 306

Patent

active

056709161

ABSTRACT:
An equalizer circuit for equalizing waveform distortion of a signal that propagates through a lossy transmission cable connected between a receiver and a transmitter, the equalizer circuit including a plurality of equalizer units which are connected in series with one another and a plurality of taps, each tap providing a different equalized representation of a signal being transmitted through the transmission cable to which the equalizer circuit is connected, and a control circuit for determining the tap at which appears an equalized signal that exhibits minimum error relative to the transmitted signal, the determination being made by applying an envelope detector to each tap for obtaining low frequency envelope signals for the signal appearing at each tap and for comparing the low frequency envelope signals thus obtained with a common DC reference signal that is related to the ideal transmitted signal amplitude.

REFERENCES:
patent: 4063183 (1977-12-01), Evans
patent: 5434883 (1995-07-01), Kimoto et al.
N.G. Vinter: "Equalizer Circuit for Data Transmission System", Xerox Disclosure Journal, vol. 1, No. 4, Apr. 1976; pp. 71-72.

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