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. 05, 2013
Filed:
Nov. 23, 2009
Kazunori Kasuga, Kawasaki, JP;
Kazunori Kasuga, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A nonvolatile memory includes a memory cell array including a plurality of memory cells, each of the memory cells capable of storing electric charges nonvolatilly, a first sense amplifier for comparing a voltage produced by one of the selected memory cells to be read out with a first threshold value for distinguishing between a write state and an erase state of the selected memory cell, a second sense amplifier for comparing the voltage produced by one of the selected memory cell with a second threshold value having a greater voltage than the first threshold voltage, and a write unit for rewriting data of the selected memory cell when the first and the second sense amplifiers produce different sense outputs from each other.