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:
Dec. 21, 2004
Filed:
Nov. 08, 2002
Takeshi Okazawa, Kanagawa, JP;
Shuuichi Tahara, Kanagawa, JP;
NEC Electronics Corporation, Kawasaki, JP;
Abstract
A semiconductor memory device as claimed in the present invention has a reference cell, a first memory cell, a second memory cell located nearer the first memory cell than the reference cell and a data read circuit provided therein. The data read circuit identifies first data stored in the first memory cell based on a reference cell electrical state of the reference cell and a first electrical state of the first memory cell. Furthermore, the data read circuit identifies second data stored in the second memory cell based on the first electrical state of the first memory cell and a second electrical state of the second memory cell. The semiconductor memory device having such configuration is able to suppress influence of variation in electrical performance of memory cell and stably identify data stored in a memory cell.