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:
Oct. 17, 2000
Filed:
Jan. 08, 1998
Applicant:
Inventors:
Hiroshi Akamatsu, Hyogo, JP;
Shigeru Mori, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
714710 ; 365200 ; 36523006 ;
Abstract
In an SDRAM, when a spare column selection line is not used, access to a column selection line is started at a first time at which complementary column address signals are defined, and access to the column selection line is stopped until a second time at which the level of a redundant column decoder activation signal is defined when the spare column selection line is used. Compared with the case in which access to the column selection line is always stopped until the second time, the access speed is increased.