Line equalizer having pulse-width deviation detector for...

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

H - Electricity

04

M

333/28, 379/66

H04M 7/00 (2006.01) H04B 3/04 (2006.01)

Patent

CA 1261496

NE-84-MK (044A/3) "Line Equalizer Having Pulse-Width Deviation Detector For Compensating Long-Term Level Variations" ABSTRACT OF THE DISCLOSURE 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.

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