Patent ID: 8284183

Claim:
An inverter circuit comprising: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor and a seventh transistor each having channels of same conduction type; a first capacitive element; and an input terminal and an output terminal, wherein the first transistor makes or breaks electric connection between the output terminal and a first voltage line, in response to a potential difference between a voltage of the input terminal and a voltage of the first voltage line or a potential difference corresponding thereto, the second transistor makes or breaks electric connection between a second voltage line and the output terminal, in response to a potential difference between a voltage of a first terminal that is a source or a drain of the seventh transistor and a voltage of the output terminal or a potential difference corresponding thereto, the third transistor makes or breaks electric connection between a gate of the seventh transistor and the third voltage line, in response to a potential difference between the voltage of the input terminal and a voltage of a third voltage line or a potential difference corresponding thereto, the fourth transistor makes or breaks electric connection between the first capacitive element and the gate of the seventh transistor, in response to a first control signal inputted into a gate of the fourth transistor, the fifth transistor makes or breaks electric connection between the first capacitive element and a fourth voltage line, in response to a second control signal inputted into a gate of the fifth transistor, the sixth transistor makes or breaks electric connection between the first terminal and the fifth voltage line, in response to a potential difference between the voltage of the input terminal and a voltage of a fifth voltage line or a potential difference corresponding thereto, the seventh transistor makes or breaks electric connection between the first terminal and a sixth voltage line, in response to a potential difference between a gate voltage of the seventh transistor and a gate voltage of the second transistor or a potential difference corresponding thereto, and the first capacitive element is inserted between a drain or a source of the fifth transistor and a seventh voltage line.