Drive circuit

A driving circuit comprising a first conductivity type switching transistor and a second conductivity type switching transistor which are connected in series between high-voltage and low-voltage both source terminals, and a plurality of inverters provided on a path through which an input signal is transmitted to both the transistors;

• one of both the transistors being turned on, and the other being turned off, by means of the inverters to bring an output terminal connected between both the transistors, to any of a high voltage level and a low voltage level;
• said inverters being each constituted of a bipolar transistor which is element-isolated by insulating layers in a first conductivity type semiconductor substrate, and, in addition to inverters each having in the first conductivity type semiconductor substrate a second conductivity type impurity-diffused region for drawing out electric charges, inverters which do not have the second conductivity type impurity-diffused region are provided in combination with the former.