JFET switch circuit

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.