Semiconductor switching circuit

Details Semiconductor switching circuit Semiconductor switching circuit

1987-07-28

1989-01-31

Miller, Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307570, 250551, G02B 2700

Patent

active

048018228

ABSTRACT:
A semiconductor switching circuit comprises an output FET receiving a photovoltaic output generated by a diode array responsive to a light signal from a light emitting element, a depression mode driving FET connected at the drain and source to the gate and source of the output FET, and a constant voltage conduction element connected in parallel with a resistor connected across the gate and source of the driving FET. The sensitivity of the circuit is elevated by setting the value of this resistor relatively high, whereas high speed operation can be assured by having discharge current of an accumulated charge across the drain and gate of the output FET bypassed through the resistor.

REFERENCES:
patent: 3299297 (1967-01-01), Motto, Jr.
patent: 4227098 (1980-10-01), Brown et al.
patent: 4303831 (1981-12-01), El Hamamsy
patent: 4390790 (1983-06-01), Rodriguez
patent: 4419586 (1983-12-01), Phipps
patent: 4492883 (1985-01-01), Janutka
patent: 4665316 (1987-05-01), Hodges

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