Patent ID: 7408226

Claim:
A semiconductor integrated circuit device comprising: a semiconductor region of a first conductivity type; a first insulated-gate field effect transistor formed on the semiconductor region of the first conductivity type and having a drain region of a second conductivity type connected to an output terminal; a second insulated-gate field effect transistor formed on the semiconductor region of the first conductivity type and having a drain region of the second conductivity type connected to a gate of the first insulated-gate field effect transistor to drive the first insulated-gate field effect transistor; and a third insulated-gate field effect transistor formed on the semiconductor region of the first conductivity type and having a source region connected to a gate thereof and a drain region connected to the gate of the first insulated-gate field effect transistor, a distance from the drain region of the first insulated-gate field effect transistor to the drain region of the third insulated-gate field effect transistor which is connected to the gate of the first insulated-gate field effect transistor being shorter than a distance from the drain region of the first insulated-gate field effect transistor to the drain region of the second insulated-gate field effect transistor, the third insulated-gate field effect transistor being formed in an active region in which the first insulated-gate field effect transistor is formed, wherein the source region of the third insulated-gate field effect transistor is shared with the source region of the first insulated-gate field effect transistor.