Patent ID: 7098698

Claim:
A SOI transistor integrated circuit device having a single crystal of silicon formed on an insulating film as a body, comprising: a p-channel MOS transistor, a first potential being supplied to a source of the p-channel MOS transistor, a variable potential corresponding to a signal input being supplied to a body of the p-channel MOS transistor, and a control signal being supplied to a gate of the p-channel MOS transistor; an n-channel MOS transistor, a second potential being supplied to a source of the n-channel MOS transistor, and the signal input being supplied to a gate of the n-channel MOS transistor; and a signal output section connected to a connection node directly connecting a drain of the p-channel MOS transistor and a drain of the n-channel MOS transistor, the body of the n-channel MOS transistor and the source of the n-channel MOS transistor being set at the same potential.