Semiconductor circuit device.

摘要

A system providing a drive circuit for a bipolar transistor (2; 51, 52) high in speed and low in power consumption even under a low source voltage using a MOSFET (3; 53, 54) is disclosed. The base current of the bipolar transistor (2; 51, 52) is supplied not by shortcircuiting the collector and the base thereof by a MOSFET (3; 53, 54) but from another base current source.