Subscriber line interface circuit and transformer therefor north

Details Subscriber line interface circuit and transformer therefor north Subscriber line interface circuit and transformer therefor north

1989-03-22

1991-02-12

Ng, Jin F.

Telephonic communications

Subscriber line or transmission line interface

Network interface device

336222, 379399, H01F 2728, H04M 1900

Patent

active

049930648

ABSTRACT:
In a SLIC in which loop current is supplied via active circuits, feed resistances via which the active circuits are conventionally coupled to the line are constituted by bifilar resistance wire windings of a ferrite core transformer, which may include a third winding coupled to an input of the active circuits.

REFERENCES:
patent: 1869914 (1932-08-01), Round
patent: 3464002 (1969-08-01), Hentschel
patent: 4238644 (1980-12-01), Dijkmans et al.
patent: 4258467 (1981-03-01), Witte
patent: 4484032 (1984-11-01), Rosenbaum

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