Subscriber loop current regulator

Details Subscriber loop current regulator Subscriber loop current regulator

1982-03-25

1984-10-09

Schreyer, Stafford D.

Electricity: power supply or regulation systems

Remote sensing

179 70, 179 16F, 323278, 307 2, H04M 1900

Patent

active

044763514

ABSTRACT:
A current regulator for supplying dc power to a telephone line employs a resistor feed circuit in conjunction with a solid state feed circuit. The dc line current flowing through both such elements is monitored by a sensing circuit which drives the solid state element in a manner to maintain a desired magnitude of dc line current. The resistor value may be arbitrarily chosen so that the circuit power is shared in a desired proportion between the resistor and solid state element. When used in a telephone line in series with ac voice signals the regulator employs a capacitator and diode bridge arrangement to reduce the ac impedance thereof, improve longitudinal balance and allow bi-directional current.

REFERENCES:
patent: 4156150 (1979-05-01), Harrigan et al.
patent: 4314106 (1982-02-01), Bakker

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