SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

PROBLEM TO BE SOLVED: To reduce a consumption current at a standby time in a semiconductor integrated circuit using a plurality of CMOS circuits using a small MOS transistor. SOLUTION: The device parameter of a switching transistor S1 is set to that the leakage current of the S1 for composing a power supply switch that is turned off at a standby time becomes smaller than the total of the sub threshold current of a p-channel of n-channel MOS in an off state of a plurality of CMOS circuits Ci. As a result, the current of a plurality of CMOS circuits C1 at a standby time becomes a small leakage current of the switching transistor S1, and not a large sub threshold current of the Ci using a small MOS.