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:
Feb. 20, 2007
Filed:
Feb. 25, 2004
Applicants:
Shigeji Ikeda, Tokyo, JP;
Shinichi Fukuda, Tokyo, JP;
Isao Ohdaira, Kanagawa, JP;
Toshihiko Sato, Kanagawa, JP;
Inventors:
Shigeji Ikeda, Tokyo, JP;
Shinichi Fukuda, Tokyo, JP;
Isao Ohdaira, Kanagawa, JP;
Toshihiko Sato, Kanagawa, JP;
Assignee:
Sony Corporation, , JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A memory space of a memory cell array is divided into a plurality of submemory spaces. A refresh control circuit executes a control of performing refreshment of information to the submemory spaces that are in use at the time of the refreshment of the information and need the refreshment among the plurality of submemory spaces and executes a control of not performing the refreshment to the submemory spaces that are not in use and do not need the refreshment.