JFET switch circuit

Details JFET switch circuit JFET switch circuit

1977-09-16

1979-02-06

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307255, 307304, 330300, 357 22, 357 43, H03K 1760, H03K 1704, H03K 1716, H03K 1772

Patent

active

041386140

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 if 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: 3456166 (1969-07-01), Welty
patent: 3731116 (1973-05-01), Hill
patent: 3740581 (1973-06-01), Pfiffner
patent: 3895238 (1975-07-01), Saari
patent: 3902078 (1975-08-01), Peterson
patent: 3911294 (1975-10-01), Davis et al.
patent: 3916222 (1975-10-01), Compton
patent: 3955103 (1976-05-01), Russell et al.
patent: 4020365 (1977-04-01), Weir
patent: 4042836 (1977-08-01), Compton et al.

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