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:
Jul. 09, 2002
Filed:
Nov. 22, 2000
Applicant:
Inventor:
Akira Hosogane, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 1/606 ; G11C 7/00 ;
U.S. Cl.
CPC ...
G11C 1/606 ; G11C 7/00 ;
Abstract
In a data register latching a data on a selected memory cell of a memory array, circuitry is provided for repairing a defect when the defect is present in a latch circuit included in the data register. The defect repairing is implemented by reverse current flow prevention for a latch power supply, of a determination transistor into a non-conductive state, determination with a forcibly setting circuit, inversion of a latch data, switching of current detectors. A product yield is improved by repairing the defect even when the defect is present in a latch circuit section in which a data is latched.