Patent ID: 7671655

Claim:
A level conversion circuit comprising: a high-potential-side level conversion unit which is connected between a first high-voltage power supply and a first low-voltage power supply, and converts a high-potential-side voltage of an input signal; a low-potential-side level conversion unit which is connected between a second high-voltage power supply with a lower voltage than the first high-voltage power supply and a second low-voltage power supply with a lower voltage than the first low-voltage power supply, and converts a low-potential-side voltage of the input signal; a first load-reducing unit which outputs a voltage level of the first high-voltage power supply or a voltage level of the first low-voltage power supply on the basis of an output of the high-potential-side level conversion unit; a second load-reducing unit which outputs a voltage level of the second high-voltage power supply or a voltage level of the second low-voltage power supply on the basis of an output of the low-potential-side level conversion unit; and an output unit to which an output of the first load-reducing unit and an output of the second load-reducing unit are input, and which outputs the voltage level of the first high-voltage power supply and the voltage level of the second low-voltage power supply, the output unit comprises a first transistor of a first conductivity type and a second transistor of a second conductivity type, current paths of the first transistor and the second transistor being connected in series between the first load-reducing unit and the second load-reducing unit.