Ring generator

Details Ring generator Ring generator

1998-02-20

2000-12-26

Hudspeth, David R.

Telephonic communications

Supervisory or control line signaling

Signal reception at substation

379377, H04M 302

Patent

active

061671312

ABSTRACT:
In a local loop telephone system, a voltage limited device having circuitry to provide subscriber interface functions and generate a ring signal. The device comprises four switches in a full bridge drive configuration. An external source provides a constant voltage which converted into an alternating ring voltage by triggering the switches in a specified sequence.

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patent: 4367376 (1983-01-01), Proctor et al.
patent: 4447675 (1984-05-01), Arntsen et al.
patent: 4563547 (1986-01-01), Booth
patent: 4827503 (1989-05-01), Takato et al.
patent: 5694465 (1997-12-01), Apfel

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