JFET switch circuit and structure

Details JFET switch circuit and structure JFET switch circuit and structure

1976-12-27

1978-04-18

Wojciechowicz, Edward J.

357 22, 357 34, 357 41, 357 45, 357 46, 357 48, H01L 2702, H01L 2710, H01L 2704, H01L 2972

Patent

active

040854175

ABSTRACT:
JFET and bipolar transistor devices are combined into an analog signal switching circuit. A JFET acts as a switch device for controlling analog signals. The JFET gate is charged through a bipolar transistor to turn it off and discharged through a second bipolar transistor to turn it on. A second JFET is used to control the conduction of the second bipolar transistor so that it only conducts heavily when a high slew rate is needed. The circuit can switch analog signals very rapidly and yet has very low quiescent current drain in both off and on states. The circuit is very simple and is amenable to monolithic integrated circuit construction.

REFERENCES:
patent: 3731164 (1973-05-01), Cheney
patent: 3778688 (1973-12-01), Crawford

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