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:
May. 21, 1985
Filed:
Dec. 28, 1981
Applicant:
Inventors:
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
371 21 ; 371 20 ; 365201 ; 324 / ;
Abstract
A means for testing the threshold voltage changes in a programmable and erasable floating gate memory cell by accessing directly and exclusively the cells in the core, and the amplifiers that sense the operation of the cells, so as to measure the relative currents therein as an indication of threshold voltage parameters.