SEMICONDUCTOR INTEGRATED CIRCUIT HAVING STAND-BY CURRENT REDUCING CIRCUIT

摘要

PURPOSE: A semiconductor IC(Integrated Circuit) is provided to reduce the current consumption in the stand-by state even when a CMOS circuit is shrunken and the subthreshold current increases. CONSTITUTION: A device parameter of a switching transistor is set in such a way that a leakage current of the switching transistor making up a power source switch which is turned off in a stand-by state is smaller than the sum total of subthreshold currents of P-channel or N-channel MOS transistors in an OFF state of a plurality of CMOS circuits. Therefore, the currents which flow through the plurality of CMOS circuits in the stand-by state are not determined by the subthreshold current but are determined by a small leakage current of the switching transistor.