Electronic hybrid having synthesized impedance circuitry

Details Electronic hybrid having synthesized impedance circuitry Electronic hybrid having synthesized impedance circuitry

1984-07-13

1986-11-11

Dwyer, James L.

Telephonic communications

Subscriber line or transmission line interface

Hybrid circuit

379345, 379348, H04B 158

Patent

active

046224424

ABSTRACT:
An electronic hybrid circuit for coupling a two-wire communication path to a four-wire communication path includes amplifier circuits having a reactive feedback path such that the output impedance of each amplifier is approximately zero ohms at DC and is a predetermined value at audio frequencies. The amplifiers are arranged to provide battery and voice signal injection on the two-wire path. Serially connected diodes provide protection from lightning.

REFERENCES:
patent: 4388500 (1983-06-01), Regan

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