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:
Jul. 11, 2000
Filed:
Apr. 26, 1999
Applicant:
Inventor:
Toshiji Ishii, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365210 ; 3652335 ;
Abstract
A semiconductor memory device includes a plurality of word lines and a plurality of bit lines arranged in a matrix and memory cells provided at intersections of the plurality of word lines and the plurality of bit lines. A dummy word line for detecting a low to high transition of a word line is provided parallel to the word line. By providing a dummy word line longer in length than a word line or the like to increase the delay in transition of the dummy word line, a reference potential to be detected can be set lower than conventional to reduce variation in detection timing.