Solid-state relay and regulator

Details Solid-state relay and regulator Solid-state relay and regulator

1981-08-27

1983-12-06

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

307311, G02B 2700

Patent

active

044195869

ABSTRACT:
An improved solid state relay and regulator having reduced turn-off time, analog or digital input, and analog or digital output, is obtained by using a depletion JFET as a variable resistance discharge path for a gate of a power MOSFET switching device wherein the gate is charged by a first set of photovoltaic cells optically coupled to but electrically isolated from an LED input. A second set of photovoltaic cells responsive to the same or a separate LED input hold the JFET in an Off state while the MOSFET gate is energized. Variable output and AND logic are obtained.

REFERENCES:
patent: 3911269 (1975-10-01), Hart et al.
patent: 4096382 (1978-06-01), Numata et al.
patent: 4158144 (1979-06-01), Krause
patent: 4165471 (1979-08-01), Ahrenkeil
patent: 4166224 (1979-08-01), Hutson
patent: 4181863 (1980-01-01), Parker
patent: 4227098 (1980-10-01), Brown et al.
patent: 4303831 (1981-12-01), El Hamamsy
patent: 4307298 (1981-12-01), El Hamamsy et al.
patent: 4323799 (1982-04-01), King

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