Driving circuit for a field effect transistor in final semibridge stage.

摘要

A drive circuit for a field-effect transistor (MFET1) which has a drain terminal connected to the positive pole (+Vcc) of the power supply and a source terminal connected to a load (OUT). The circuit has circuit means for turning off the field-effect transistor (MFET1) which comprises a first transistor (M1) connected between the gate terminal of the field-effect transistor (MFET1) and the negative pole (GND) of the power supply. Said first transistor (MFET1) is driven by an operational amplifier (M3,M4,MR1,MR2,MR3) which has inverting and non-inverting terminals connected to the gate and source terminals of the field-effect transistor (MFET1) respectively. <IMAGE>