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. 26, 2008
Filed:
May. 19, 2006
Applicant:
Toshiki Mori, Osaka, JP;
Inventor:
Toshiki Mori, Osaka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 11/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
Charge is trapped into a charge trapping region of one of two reference cells so as to achieve a state equivalent to memory cell characteristics having a smallest amount of current. Charge is trapped into a charge trapping region of the other reference cell so as to achieve a state equivalent to memory cell characteristics having a largest amount of current. Currents output from these reference cells are averaged by a current averaging circuit, and the resultant average current is output as a reference current R_REF