Electronic current feed circuit

Details Electronic current feed circuit Electronic current feed circuit

1976-11-09

1978-05-09

Claffy, Kathleen H.

179 16F, 179 78R, H04M 1908

Patent

active

040888436

ABSTRACT:
A current feed circuit for a telephone exchange transmission bridge comprising a pair of electronic circuit elements each of which has one terminal connected to a respective one of a pair of telephone lines and another terminal connected to one terminal of an electrical power supply. Each circuit element is a simulated inductance and can provide a resistive path for d.c. current from the power supply to a subscriber's telephone.

REFERENCES:
patent: 3035122 (1962-05-01), Livingstone
patent: 3916110 (1975-10-01), Lee et al.
patent: 3965447 (1976-06-01), Thomas
patent: 3993968 (1976-11-01), Lee
patent: 4004104 (1977-01-01), Picandet et al.
patent: 4011410 (1977-03-01), Thomas
patent: 4035586 (1977-07-01), Shirasu et al.

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