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. 08, 1996
Filed:
Jul. 18, 1995
Atsushi Fujii, Kawasaki, JP;
Yoshitaka Takahashi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A semiconductor memory device includes a memory cell array divided into a first memory cell array for an upper address of an input address and a second memory cell array for a lower address of the input address, a redundant cell array storing correction data, a first sense amplifier provided with respect to the first memory cell array, a first column decoder provided with respect to the first memory cell array, a second sense amplifier provided with respect to the second memory cell array, and a second column decoder provided with respect to the second memory cell array. The second sense amplifier and the second column decoder are non-selected when an access is made to the first memory cell array by the input address. The non-selected second sense amplifier and second column decoder operate as a sense amplifier and a column decoder provided with respect to the redundant cell array to thereby output the correction data from the upper address of the redundant cell array.