Patent ID: 8547179

Claim:
A semiconductor device comprising: a first transistor; a second transistor; a third transistor; a fourth transistor; a fifth transistor; a first power supply line; and a second power supply line, wherein a first terminal of the first transistor is electrically connected to the first power supply line, wherein a second terminal of the first transistor is electrically connected to a first terminal of the second transistor, wherein a second terminal of the second transistor is electrically connected to a first terminal of the third transistor, wherein a second terminal of the third transistor is electrically connected to a first terminal of the fourth transistor, wherein a second terminal of the fourth transistor is electrically connected to the second power supply line, wherein a first terminal of the fifth transistor is electrically connected to the first power supply line, wherein a second terminal of the fifth transistor is electrically connected to the first terminal of the second transistor, and wherein a gate of the fifth transistor is electrically connected to the first terminal of the fourth transistor.