Patent ID: 7176741

Claim:
A level shift circuit comprising: a plurality of level shift basic circuits each for receiving a first power supply and each electrically connected to a common node; wherein a first level shift basic circuit of the plurality of level shift basic circuits includes: a first transistor of a first conductivity type for receiving the first power supply, wherein a drain thereof is electrically connected to a first node and a gate electrode thereof is electrically connected to a second node; a second transistor of the first conductivity type for receiving the first power supply, wherein a drain thereof is electrically connected to the second node and a gate electrode thereof is electrically connected to the first node; a third transistor of a second conductivity type, interposed between the first node and the common node, and having a gate electrode being controlled in response to a first input signal; a fourth transistor of the second conductivity type, interposed between the second node and the common node, and having a gate electrode being controlled in response to a second input signal; and a first output node for transmitting a first output voltage in response to a voltage of one of the first node and the second node, and wherein a second level shift basic circuit of the plurality of level shift basic circuits includes: a fifth transistor of the first conductivity type for receiving the first power supply, wherein a drain thereof is electrically connected to a third node and a gate electrode thereof is electrically connected to a fourth node; a sixth transistor of the first conductivity type for receiving the first power supply, wherein a drain thereof is electrically connected to the fourth node and a gate electrode thereof is electrically connected to the third node; a seventh transistor of the second conductivity type, interposed between the third node and the common node, and having a gate electrode being controlled in response to a third input signal; an eighth transistor of the second conductivity type, interposed between the fourth node and the common node, and having a gate electrode being controlled in response to a fourth input signal; and a second output node for transmitting a second output voltage in response to a voltage of one of the third node and the fourth node, and a connecting transistor of the second conductivity type for receiving a second power supply, wherein a drain thereof is electrically connected to the common node, and a gate electrode thereof is controlled in response to a first control input signal; and a voltage fixing circuit for fixing each of the first, second, third and fourth nodes to a predetermined voltage in response to a second control input signal.