Ring detecting circuit and method for wireless/wired composite t

Details Ring detecting circuit and method for wireless/wired composite t Ring detecting circuit and method for wireless/wired composite t

1996-12-26

1999-11-23

Bost, Dwayne D.

Telecommunications

Transmitter and receiver at same station

Convertible

455567, 379373, 379377, 379418, H04B 140, H04M 100

Patent

active

059916044

ABSTRACT:
In a circuit for notifying ring signal reception to a wireless telephone in a wireless/wired composite telephone system having a direct-current (DC) blocking circuit for blocking a DC component from a ring signal input through a ring terminal and a tip terminal and a ring detector for adjusting output signals depending on the ring signal having frequency components, a ring detecting circuit including an optical coupler for blocking a negative portion of an inputted signal received from the ring detector and for inverting a positive portion and for outputting a signal corresponding thereto, and a filter for receiving the signal output from the optical coupler and for generating a ring detection signal.

REFERENCES:
patent: 4529845 (1985-07-01), Boeckmann
patent: 4720853 (1988-01-01), Szlam
patent: 4926470 (1990-05-01), Sanford
patent: 4975940 (1990-12-01), Hashimoto
patent: 5260996 (1993-11-01), Dillon et al.
patent: 5509068 (1996-04-01), Bayless et al.
patent: 5544241 (1996-08-01), Dibner et al.
patent: 5675640 (1997-10-01), Tappert et al.
patent: 5712910 (1998-01-01), Saito
patent: 5751803 (1998-05-01), Shpater
patent: 5787365 (1998-07-01), Rivero et al.

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