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:
Jun. 10, 2003
Filed:
Feb. 08, 2001
Applicant:
Inventor:
Hidetaka Kodama, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 1/716 ;
U.S. Cl.
CPC ...
H03K 1/716 ;
Abstract
In a semiconductor integrated circuit having an LVT (low threshold voltage) block and an HVT (high threshold voltage) block, a power switch controls power supply to the LVT block. An output wrapper fixes a level of an output signal from the LVT block to a predetermined level when no power is supplied to the LVT block, and an input wrapper fixes a level of an input voltage inputted into the LVT block to a predetermined level when no power is supplied to the LVT block. As a result, low current consumption can be realized and malfunctions can be prevented in a power-down mode.