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:
Aug. 24, 2004
Filed:
Feb. 12, 2003
Masatoshi Ishikawa, Hyogo, JP;
Hiroaki Tanizaki, Hyogo, JP;
Other;
Abstract
In a memory cell array of an MRAM, a reference memory cell holding a reference value can generate accurate reference current of an intermediate value of data by uniformly supplying reference current to two sense amplifiers using two cells of a cell holding “H” data and a cell holding “L” data. Each bit line is connected to a data-storing memory cell and to the reference memory cell. When the data-storing memory cell connected to a bit line is accessed, the reference memory cell is accessed on the adjacent bit line. Only one row of reference memory cells is provided, reducing the chip area. Therefore, a non-volatile memory device that can reduce the area of a reference cell occupied on a chip while generating accurate reference current for determination can be provided.