Patent ID: 6118328
Filing Date: 2000-09-12
Classification: H03K

Abstract:
A semiconductor integrated circuit comprising:a first power supply line to which a first power supply potential is supplied;a virtual power supply line;a logic circuit connected to the virtual power supply line, the logic circuit including a plurality of transistors, each of the transistors having a predetermined threshold voltage;a power control transistor provided between the first power supply line and the virtual power supply line, having control electrode to which a first control signal is inputted the power control transistor having a threshold voltage which is higher than the threshold voltage of said transistors of said logic circuit when the power control transistor is in a non-active state;a second power supply line to which a second power supply potential is supplied; anda substrate potential control circuit connected to a substrate on which the power control transistor is formed, the first power supply line, and the second power supply line, the substrate potential control circuit adjusting a substrate potential such that the threshold voltage of the power control transistor in an active state of the power control transistor is lower than the threshold voltage of the power control transistor in the non-active state of the power control transistor.