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:
Feb. 28, 1984
Filed:
Nov. 02, 1981
Applicant:
Inventors:
Yung J Chen, Weston, MA (US);
Eden Y Mei, Huntington Beach, CA (US);
Assignee:
McDonnell Douglas Corporation, Long Beach, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365210 ; 365203 ; 365218 ;
Abstract
A sensing system for a nonvolatile memory transistor array employs reference transistors which are substantially identical to the memory transistors within the array and employs means to program the threshold voltage levels of the reference transistors to a lower level than that of the memory transistors within the array such that the changes in the electrical characteristics of both the memory and the reference transistors are proportional over time, the system thereby being rendered self-tracking.