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:
Sep. 30, 2014
Filed:
Oct. 07, 2013
Panasonic Corporation, Osaka, JP;
Ryotaro Azuma, Osaka, JP;
Kazuhiko Shimakawa, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A cross-point variable resistance nonvolatile memory device comprises: a memory cell array; a column decoder and pre-charge circuit which pre-charges a selected word line to a first voltage in a period Pamong the period P, a period P, and a period S that are included in this order in a read operation of a memory cell; a low decoder driver which pre-charges a selected word line to the first voltage in the periods Pand Pand sets the selected word line to a third voltage different from the first voltage in the period S; a feedback controlled bit line voltage clamp circuit which sets the selected bit line to a second voltage in the periods Pand S; and a sense amplifier which determines the resistance state in a memory cell at a cross-point of the selected word line and the selected bit line in the period S.