Solid state overvoltage protection circuit

Details Solid state overvoltage protection circuit Solid state overvoltage protection circuit

1988-06-27

1990-02-27

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361 56, 361111, 361117, 379331, 379412, H02H 900

Patent

active

049051199

ABSTRACT:
An overvoltage protection circuit for electronic equipment having tip and ring lines includes a first voltage sensitive switch having first and second teminals. The first terminal of the first switch is connected to the tip line. A second voltage sensitive switch includes first and second terminals. The first terminal of the second switch is connected to the second terminal of the first switch, and the second terminal thereof is connected to the ring line. A third voltage sensitive switch includes first and second terminals. The first terminal of the third switch is connected to the second terminal of the first switch and to the first terminal of the second switch. The second terminal of the third switch is connected to ground potential. The switches are conductive when a respective voltage threshold is exceeded.

REFERENCES:
patent: 4282555 (1981-08-01), Suedberg
patent: 4408248 (1983-10-01), Bulley et al.
patent: 4695916 (1987-09-01), Saton et al.

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