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:
Jun. 16, 1998
Filed:
Jan. 31, 1996
Applicant:
Inventors:
Yutaka Hayashi, Kanagawa, JP;
Machio Yamagishi, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518503 ; 3651852 ;
Abstract
A non-volatile semiconductor memory device including a plurality of non-volatile memory cells and a plurality of reference cells provided for corresponding to storage states in the non-volatile memory cell, generating a reference current which is a current between two output currents of at least two reference cells or a current proportional to the current when data reading from the non-volatile memory cell, and comparing the reference current and a current from the non-volatile memory cell to read out a data stored in the non-volatile memory cell.