Patent ID: 8067976

Claim:
A semiconductor integrated circuit comprising: a substrate voltage control circuit comprising at least a MOS element for supplying a substrate voltage for controlling the supply of the substrate voltage of the semiconductor integrated circuit; a drain current setter having a current source connected to the MOS element for adjusting a drain current of the MOS element for supplying the substrate voltage by controlling the substrate voltage of the MOS element for supplying the substrate voltage; a MOS element characteristic detecting circuit comprising a characteristic detecting element for detecting a characteristic of the MOS element for supplying the substrate voltage; and a drain current corrector for correcting the drain current of the MOS element for supplying the substrate voltage by controlling the current source for supplying the substrate voltage in accordance with the characteristic of the MOS element for supplying the substrate voltage detected by the MOS element characteristic detecting circuit, wherein the MOS element characteristic detecting circuit comprises a comparator for comparing an output of the characteristic detecting element to a reference value, and wherein the MOS element characteristic detecting circuit detects the characteristic of the MOS element for supplying the substrate voltage based on a result of the comparison by the comparator.