Solid state switch

Details Solid state switch Solid state switch

1977-10-31

1978-12-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

307311, G02B 2700

Patent

active

041297857

ABSTRACT:
A solid state switch is provided which has four terminals, two for the A.C. power which is to be switched and two for signal input. The circuit comprises a full wave bridge rectifier having a light-activated silicon controlled rectifier connected across its D.C. terminals. A capacitor and a light-activated transistor are added to a zero-cross firing circuit whereby the solid state switch is protected from high voltage transients and is applicable for use with resistive, capacitive, and inductive loads.

REFERENCES:
patent: 3708672 (1973-01-01), Marinkovic
patent: 3723769 (1973-03-01), Collins

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