Device for limiting the working voltage mechanical switches in t

Details Device for limiting the working voltage mechanical switches in t Device for limiting the working voltage mechanical switches in t

1993-02-16

1995-09-05

Dwyer, James L.

Telephonic communications

Terminal

Switch or switch actuator structure

379377, 379387, 379412, H04M 100

Patent

active

054486360

ABSTRACT:
Device for limiting the working voltage for mechanical switches in telephony includes terminals for connection to a telephone line, a connection and power supply branch for a control circuit extending from a first terminal, the branch having a first switch, the cathode terminal of a first Zener diode and the source terminal of a first MOSFET transistor being connected to the output terminal of the first switch, the gate terminal of the first MOSFET transistor being connected, through the anode terminal of the Zener diode, to the first terminal. The current absorbed by the device may be adjusted.

REFERENCES:
patent: 4360710 (1982-11-01), Chaput et al.
patent: 4475012 (1984-10-01), Gulmance
patent: 4634814 (1987-01-01), Pommer, II
patent: 4847899 (1989-07-01), Hikida
patent: 4896352 (1990-01-01), Dabin
patent: 5121425 (1992-06-01), Reichelt

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