The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 2000
Filed:
May. 21, 1997
Koji Fujii, Zama, JP;
Takakuni Douseki, Atsugi, JP;
Nippon Telegraph and Telephone Corporation, Toyko, JP;
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.