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:
Nov. 16, 1993
Filed:
Jul. 28, 1989
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365185 ; 365 45 ; 365168 ;
Abstract
The input data comprising binary data to be stored are converted into multi-state data. A voltage of a level based on the converted multi-state data is applied to a source region to perform write operation to a memory transistor. As a result, the threshold voltage of the transistor is set to a value corresponding to the potential of the source region. In read operation a drain current generated in the memory transistor is detected and the multi-state data corresponding to the current are obtained. These multi-state data are converted into binary data to be outputted as output data.