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:
Mar. 23, 2004
Filed:
Oct. 15, 2002
Applicant:
Inventor:
Yutaka Terada, Hirakata, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 8/16 ;
U.S. Cl.
CPC ...
G11C 8/16 ;
Abstract
A semiconductor memory having ports, each of which conducts exclusively a writing or reading operation, by which the access operation can be speeded up when cells at the same row address are accessed simultaneously through two ports. A current-carrying capability of a write access transistor making up a memory cell is lowered relative to a current-carrying capability of a read access transistor within a range capable of finishing the writing operation.