Patent ID: 7208798

Claim:
A semiconductor integrated circuit, comprising: a first field effect transistor with a first conductivity type enhancement structure that comprises a first conductivity type gate electrode; a second field effect transistor with a second conductivity type enhancement structure that comprises a second conductivity type gate electrode; a third field effect transistor that has a structure produced by substituting the gate electrode of a field effect transistor having a second conductivity type depression structure for a midgap gate electrode or a first conductivity type gate electrode; first wiring that connects a first main electrode of the first field effect transistor and a first main electrode of the second field effect transistor to an output node; second wiring that connects the gate electrode of the first, second and third field effect transistors to an input node; third wiring that connects a second main electrode of the second field effect transistor and a first main electrode of the third field effect transistor; a first power supply line that supplies a first supply voltage to a second main electrode of the first field effect transistor; a second power supply line that supplies a second supply voltage to a second main electrode of the third field effect transistor; and a third power supply line that supplies a substrate voltage to the second and third field effect transistors.