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. 04, 2003
Filed:
Jan. 30, 2002
Kenichiro Sugio, Miyazaki, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A redundant memory circuit for use in an analog semiconductor memory has a cell array divided into sectors. To replace bad sectors, the cell array may include a pair of redundant sectors disposed at opposite ends of the cell array, or may have a centrally located redundant sector. Alternatively, the redundant memory circuit may have a sector selection circuit that selects the sectors and redundant sector in sequence from one end of the cell array to the other, or may have a word line selector located in the center of the cell array, or may have two cell arrays and a redundant sector selection circuit that enables a bad sector in one cell array to be replaced by a redundant sector in either of the two cell arrays. These arrangements improve the capability for redundancy replacement and the quality of the reproduced analog signal.