High voltage analog solid state switch

Details High voltage analog solid state switch High voltage analog solid state switch

1982-12-23

1986-09-09

Corbin, John K.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

307311, 361173, G02B 2700

Patent

active

046111239

ABSTRACT:
A high voltage analog solid state switch is disclosed which includes a pair of MOS FET's 10 and 20 having commonly coupled sources 11 and 21 and commonly coupled gates 13 and 23. A photovoltaic generator 30 and an opto-coupler 40 are connected in parallel between the commonly coupled gates and sources. The input node is connected to the drain of one transistor 10 while an output node is connected to the drain of the other transistor 20. The switch is turned on by application of light 32 to generator 30 to thereby positively bias the gates 13 and 23 and cause transistors 10 and 20 to conduct. The switch is turned off by application of light 42 to coupler 40 to thereby short the commonly coupled sources 11 and 21 to the commonly coupled gates 13 and 23.

REFERENCES:
patent: 4227098 (1980-10-01), Brown et al.
patent: 4295226 (1981-10-01), Dombrowski
patent: 4307298 (1981-12-01), El Hamamsy
patent: 4355237 (1982-10-01), Harris
patent: 4390790 (1983-06-01), Rodriguez
patent: 4419586 (1983-12-01), Phipps

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