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:
Sep. 19, 2006
Filed:
Oct. 15, 2002
Applicant:
Masaki Tsukude, Hyogo, JP;
Inventor:
Masaki Tsukude, Hyogo, JP;
Assignee:
Renesas Technology Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01); G11C 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a freeze reset circuit in a semiconductor memory device, when a row act signal is not activated in a predetermined period determined by a trailing edge delay circuit after a chip enable signal is set to the H level during a write or read operation, a freeze reset signal is output from a logic gate after a predetermined period. As a result, the semiconductor memory device terminates the write or read operation. Therefore, the semiconductor memory device can ensure the stability of the write or read operation.