Code converter comprising protection circuit

Details Code converter comprising protection circuit Code converter comprising protection circuit

1994-07-19

1996-03-19

Hofsass, Jeffery

Telephonic communications

Subscriber line or transmission line interface

Protective circuit

379399, 379413, 379339, H04M 700

Patent

active

055008968

ABSTRACT:
A code converter for processing switching information signals, which comprises a protection circuit for limiting a current flowing in a telephone exchange wire. The protection circuit includes an evaluation circuit, which causes a switch arranged in series with the telephone exchange wire to open if the current, or a signal derived from the current, exceeds a threshold value. In an embodiment of the invention the current is also limited if the current assumes intolerably high values only for a brief period of time and no opening of the switch is effected.

REFERENCES:
patent: 4359655 (1982-10-01), Rademaker et al.
patent: 5046089 (1991-09-01), Pariani et al.
patent: 5050210 (1991-09-01), Dillon et al.
patent: 5392349 (1995-02-01), Elder, Jr.

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