Patent ID: 8476929

Claim:
A semiconductor device comprising: a first inverter; a circuit comprising: a second inverter including an output electrically connected to an output of the first inverter, and comprising a first transistor of one of a n-channel type and a p-channel type, and a second transistor of another channel type than the first transistor, a terminal of the first transistor and a terminal of the second transistor forming the output of the second inverter; and a third transistor electrically connected in series with the first transistor and the second transistor between a first potential power supply line and a second potential power supply line, without other intervening component between the lines, so that, when the circuit is in operation, the second inverter is constantly supplied with a power supply potential supplied through one of the first potential power supply line and the second potential power supply line; and a third inverter including an input electrically connected to an output of the first inverter and to an output of the second inverter, and an output electrically connected to an input of the second inverter.