Patent ID: 7940577

Claim:
A semiconductor integrated circuit device comprising: a field effect transistor; and a voltage control circuit generating a control voltage to be supplied to a gate terminal of the field effect transistor for deactivating the field effect transistor, the voltage control circuit controlling a voltage so as to substantially minimize leakage current flowing when the field effect transistor is inactive in accordance with a device temperature, wherein the voltage control circuit includes: a cell leakage current detector reproducing leakage current generated in the field effect transistor of an inactive state based on the control voltage and generating a detecting voltage in accordance with a current value of the leakage current; and a voltage generator setting a voltage value of the control voltage based on the detecting voltage and changing the voltage value of the control voltage in accordance with a device temperature, wherein the cell leakage current detector includes a leakage current detecting field effect transistor having substantially the same shape or electrical characteristics as the field effect transistor and generates the detecting voltage in accordance with a current value of leakage current generated in the leakage current detecting field effect transistor.