Patent ID: 7605601

Claim:
A semiconductor integrated circuit device, comprising: a semiconductor substrate; and a first transistor of a first conductivity type and a second transistor of the first conductivity type, the transistors being connected in series between a first power supply line and a first substrate well provided on the semiconductor substrate, the first transistor of the first conductivity type having a source or drain connected to the first power supply line and a gate fed with a first control signal inputted from outside, the second transistor of the first conductivity type having a source or drain connected to the first substrate well and a gate connected to a second power supply line, the semiconductor integrated circuit device further comprising a first transistor of a second conductivity type and a second transistor of the second conductivity type, the transistors being connected in series between the second power supply line and a second substrate well provided on the semiconductor substrate, the first transistor of the second conductivity type having a source or drain connected to the second power supply line and a gate fed with a second control signal inputted from the outside, the second transistor of the second conductivity type having a source or drain connected to the second substrate well and a gate connected to the first power supply line.