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. 15, 2009
Filed:
Jul. 14, 2005
Kozo Nishimura, Osaka, JP;
Kozo Nishimura, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A comparing unit () in a readout control unit () compares one bit data stored in a memory body () with a value stored in a data storage unit B[m] which is prepared to store the one bit data. The data storage unit B[m] includes three memory cells MC[k] and the stored value of the data storage unit B[m] is obtained by a logical operation unit () operable to calculate an exclusive OR with respect to the three memory cells MC[k]. When mismatching is detected in the comparing unit (), a rewrite cell determination unit () determines one of the three memory cells MC[k], to which rewriting of the stored value is performed. In the case where the stored value in the data storage unit B[m], if the data storage unit B[m] has a memory cell MC[k] to which writing can be performed, the writing is performed in priority to erasing.