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:
Dec. 04, 1990
Filed:
Dec. 27, 1989
Applicant:
Inventor:
Akihiko Kagami, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365200 ; 371 103 ;
Abstract
A semiconductor memory device having a redundant memory cell group selectable by a redundant decoder operable by a small power consumption is disclosed. The redundant decoder comprises a plurality of address program circuits which store address of a defective memory cell or cells and a control circuit for enabling the address program circuits when at least one defective memory cell is present and disenabling the address program circuits when no defective memory cell is present.