System for feeding in continuous current to a telephone line

Details System for feeding in continuous current to a telephone line System for feeding in continuous current to a telephone line

1975-04-29

1977-01-18

Claffy, Kathleen H.

179 16F, H04M 1908

Patent

active

040041042

ABSTRACT:
A d.c. power supply circuit for a telephone line which utilizes transistor circuits having an active reactance to replace the telephone transformer. The transistor circuits each transform a capacitor into an effectively inductive reactance, thus resulting in a cost and space savings.

REFERENCES:
patent: 2897432 (1959-07-01), Jackson
patent: 3035122 (1962-05-01), Livingstone
patent: 3223781 (1965-12-01), Hestad
patent: 3906167 (1975-09-01), Baker

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