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:
Apr. 16, 2002
Filed:
Oct. 11, 2000
Applicant:
Inventor:
Robert Patti, Warrenville, IL (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 7/02 ;
U.S. Cl.
CPC ...
G11C 7/02 ;
Abstract
A multi-level memory in which each storage cell stores multiple bits. The memory includes a plurality of storage words, a data line, a plurality of reference lines, and a read circuit. Each storage word includes a data memory cell and a plurality of reference memory cells. A stored charge determines a conductivity value measurable between the first and second terminals of each memory cell. The read circuit generates a digital value indicative of the value stored in the data memory cell of a storage word that is connected to the data and reference lines by comparing the conductivity of the data line with a continuous conductivity curve determined by the conductivities of the reference lines.