Patent ID: 8866718

Claim:
A drive circuit comprising an input-side inverter circuit and an output-side inverter circuit connected to each other in series and inserted between a high-voltage line and a low-voltage line, wherein the output-side inverter circuit includes: a first transistor having a drain connected to a high-voltage line side and a source connected to an output side of the output-side inverter circuit; a second transistor having a drain connected to a low-voltage line side and a source connected to an output side of the output-side inverter circuit; a third transistor of which a first of a source or drain is connected to a gate side of the first transistor and of which a second of the source or drain is connected to a source side of the first transistor; a fourth transistor of which a first of a source or drain is connected to a source side of the first transistor and of which a second of a source or drain is connected to an output side of the output-side inverter circuit; a first capacitive element of which a first end is connected to a gate side of the first transistor and a second end is connected to an input side of the output-side inverter circuit, and a correction circuit to correct gate voltage of the first and second transistors; wherein the correction circuit is configured to set a correction voltage of the first transistor or a voltage corresponding to the correction voltage of the first transistor, for a gate of the first transistor, as an offset voltage to the first transistor, to correct for a threshold voltage in the first transistor, and wherein the correction circuit also sets a correction voltage of the second transistor or a voltage corresponding to the correction voltage of the second transistor, for a gate of the second transistor, as an offset voltage to the second transistor.