Patent ID: 6621292
Filing Date: 2003-09-16
Classification: G11C,H03K

Abstract:
A semiconductor integrated circuit comprising:a first node and a second node; a logic circuit including a MOS transistor having a source-drain path located between said first node and said second node; a first power supply line electrically connected to said first node; and a supply voltage control circuit supplying a first voltage or a second voltage selectively to said first node via a switching element; wherein leakage current flows through said source-drain path of said MOS transistor even when a voltage of a gate of said MOS transistor is equal to a voltage of a source of said MOS transistor; wherein said second node is supplied with said second voltage; and wherein said supply voltage control circuit supplies the first voltage to said first node via said first power supply line when the semiconductor integrated circuit is in an active state, and stops supplying the first voltage to said first node and supplies the second voltage to said first node when said semiconductor integrated circuit is not in said active state, further comprising: a second power supply line electrically connected to said second node, wherein said supply voltage control circuit has a first switch MOS between said first power supply line and said first node and a second switch MOS between said second power supply line and said second node and wherein said first voltage is supplied to said first node via the first switch MOS and said second voltage is supplied to said first node via the second switch MOS.