Line equalizer having pulse-width deviation detector for compens

Details Line equalizer having pulse-width deviation detector for compens Line equalizer having pulse-width deviation detector for compens

1986-11-05

1987-11-17

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

330279, 375 98, 379410, H04B 320

Patent

active

047078405

ABSTRACT:
An adaptive line equalizer for a transmission line having a limited bandwidth comprises a frequency equalizer having a frequency response characteristic substantially inverse to the frequency response characteristic of the transmission line. A width deviation detector is provided for detecting the duration of an isolated pulse from the output of the frequency equalizer to generate a control signal representative of a deviation of the detected duration from a reference value. A variable gain amplifier is connected in series with the frequency equalizer for amplifying the pulse signal with a gain variable as a function of the control signal to compensate for long-term level variations.

REFERENCES:
patent: 3280274 (1966-10-01), Schoeffler
patent: 4625240 (1986-11-01), Yablonski et al.
patent: 4652703 (1987-03-01), Lu et al.

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