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:
Nov. 11, 2003
Filed:
Oct. 15, 2001
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 8/00 ;
U.S. Cl.
CPC ...
G11C 8/00 ;
Abstract
A memory array is divided into a plurality of memory sub blocks in row and column directions. A column selection line is provided in the column direction in a region between blocks. A block decoding circuit generating a local column selection signal is arranged corresponding to each of the memory sub blocks. A main I/O line pair group is provided for each of the memory sub blocks and each column of the memory sub block is connected to the corresponding main I/O line pair in accordance with the local column selection line. Thus, data with a desired bit width can be produced without any increase in area occupied by the array nor decrease in the speed of column access.