Adaptive equalizer

Details Adaptive equalizer Adaptive equalizer

1981-11-27

1984-01-03

Gensler, Paul L.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

179 16F, 179170R, 330254, 330282, H04B 304, H03H 1106

Patent

active

044244983

ABSTRACT:
An adaptive equalizer for a twisted pair telephone line comprises a differential input/output amplifier, with the line connected to its positive input via a resistor and DC blocking capacitors. The junction of these capacitors is grounded via an adjustable impedance.
The amplifier has a feedback loop with another adjustable impedance also connected to the negative input of the amplifier.
Line impedance variations vary the impedance of both of the adjustable impedances, which, include diodes to separately compensate for the line's attenuation and frequency characteristics.

REFERENCES:
patent: 3568100 (1971-03-01), Tarbox
patent: 3753140 (1973-08-01), Feistel

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