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:
Mar. 21, 2006
Filed:
Sep. 05, 2003
Masahiro Kamoshida, Yokohama, JP;
Daisaburo Takashima, Yokohama, JP;
Masahiro Kamoshida, Yokohama, JP;
Daisaburo Takashima, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A memory device comprises a normal memory cell array and a spare memory cell array, in which memory cells each comprising a ferroelectric capacitor are arranged; a normal word line; a normal word line driver; a spare word line; a spare word line driver; an address input circuit to which an address signal is inputted; and a judging circuit which compares an input address with a faulty address and generates an output for selecting one of the normal and spare word line drivers according to the comparison. The normal and spare word line drivers are simultaneously selected by an output of the address input circuit to start driving the normal and spare word lines, and thereafter the normal and spare word line drivers are enabled by the output of the judging circuit to stop the driving of one of the normal and spare word lines and continue the other.