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:
May. 24, 2005
Filed:
Jul. 29, 2003
Applicant:
Takaharu Tsuji, Hyogo, JP;
Inventor:
Takaharu Tsuji, Hyogo, JP;
Assignee:
Renesas Technology Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C011/00 ;
U.S. Cl.
CPC ...
Abstract
In a normal data reading, one of word lines and one of first and second dummy word lines are selected and data is read out through the access to selected regular memory cell and a reference cell. In a test mode, each of word lines are turned to a non-select state and both of first and second dummy word lines are selected and by setting one of first and second reference voltages to a level different from a level during the normal data reading, data is read out through the access to the reference cells.