Patent ID: 6861880
Filing Date: 2005-03-01
Classification: H03K

Abstract:
1. 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 source terminals, and a plurality of inverters provided on a path through which an input signal is transmitted to the transistors; one of 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 a high voltage level or a low voltage level; said inverters being provided in a transmission path of the first conductivity type switching transistor and in a transmission path of the second conductivity type switching transistor, and each of said inverters comprising 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, an inverter which does not have the second conductivity type impurity-diffused region is provided in combination with the former in each of the transmission path of the first conductivity type switching transistor and the transmission path of the second conductivity type switching transistor.