CIRCUIT DEVICE FOR POTENTIALFREE DRIVING OF A FIELD EFFECT TRANSISTOR

摘要

The receiver circuit of an optocoupler (3) is located between the source terminal (S) of a depletion-type FET (1) and a source voltage terminal (8). The source voltage terminal is connected to the gate terminal (G) of the depletion-type FET. If the optocoupler (3) is selected, the gate-source voltage of the depletion-type FET (1) becomes zero volts and it is driven to conduct. ……