Semiconductor integrated circuit, logic operation circuit, and flip flop

Abstract

Provide semiconductor integrated circuits, logic operation circuits, and flip-flops that can operate at high speed and have low leakage current. In the semiconductor integrated circuit of the present invention, only the gate circuit 1 on the critical path is constituted by an MT gate circuit unit combining a transistor with a low threshold voltage and a transistor with a high threshold voltage, and gate circuits 1 with a high threshold voltage are used for other gate circuits 1 Transistors make up. With this, the gate circuit 1 on the critical path can be operated at high speed, and the overall leakage current can be suppressed, thereby reducing power consumption.

Description

[0001] This application is a divisional application of an invention patent application filed by Toshiba Corporation on June 20, 2001 with the application number 01121646.8 and the invention title "semiconductor integrated circuit, logical operation circuit and trigger". technical field [0002] The present invention relates to a semiconductor integrated circuit, a logic operation circuit and a flip-flop formed by combining multiple transistors, in particular to the technology of reducing power consumption and increasing signal transmission speed. Background technique [0003] In order to increase the speed of CMOS logic circuits, it is necessary to configure circuits with transistors with low threshold voltages. However, there is a problem that the lower the threshold voltage of the transistor is, the larger the leakage current is during standby. In order to avoid this problem, an MT-CMOS (Multiple Threshold voltage CMOS, multiple threshold voltage CMOS) circuit that can si...

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Problems solved by technology

[0010] However, if Figure 9 As shown, when a part of the cell is constituted by a transistor with a low threshold voltage, since the leakage current flows to the cell during standby, it cannot meet the requirement of reducing the power consumption during standby as much as possible like a mobile phone.

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