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:
Oct. 24, 2000
Filed:
Dec. 28, 1998
Makoto Kitayama, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
The present invention provides a semiconductor memory device having a block selective line selecting circuit connected to a plurality of block selective common lines, each of which is commonly connected to both corresponding normal and redundant memory cell blocks in normal and redundant memory cell arrays, wherein the block selective line selecting circuit is switched into a first state to permit transmissions of decoded normal row address signals having informations of designating a normal row address to which a normal memory cell to be selected belongs when a non-defective normal memory cell is selected in the normal memory cell array, and also the block selective line selecting circuit is switched into a second state to permit transmissions of decoded redundant row address signals having informations of designating a redundant row address to which a redundant memory cell to be selected belongs when a defective normal memory cell is selected in the normal memory cell array.