Logic circuit having different threshold voltage transistors and

Details Logic circuit having different threshold voltage transistors and Logic circuit having different threshold voltage transistors and

1997-05-21

2000-08-29

Santamauro, Jon

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Signal level or switching threshold stabilization

326 83, 326121, H03K 1716

Patent

active

061114278

ABSTRACT:
A logic circuit having a first logic gate and the remaining logic gate or gates. The first logic gate is interposed in a signal path determining an operating speed, and includes at least one first MOS transistor which has a threshold voltage lower than a predetermined voltage and operates at a high speed. The remaining logic gate or gates include at least one of a second MOS transistor and a third MOS transistor as a transistor having a margin for operating speed. The second MOS transistor has a middle threshold voltage equal to or greater than the predetermined voltage, and the third MOS transistor has a high threshold voltage equal to or greater than the predetermined voltage. The power consumption of the entire logic circuit at the time of operation is reduced, while maintaining the maximum operating speed.

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patent: 5486774 (1996-01-01), Douseki et al.
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patent: 5821769 (1998-10-01), Douseki
ISSCC96/Session 5/Technology Directions: High Speed, Low Power/Paper TP 5. TP:5.4 A 0.5V Simox-MTCMOS Circuit with 200ps Logic Gate; Takakuni Douseki, et al., 1996 IEEE International Solid-State Circuits Conference; pp. 84-85, 66-67, and 364-365.

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