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:
Jul. 02, 1985
Filed:
Aug. 25, 1982
Applicant:
Inventor:
James R Cricchi, Catonsville, MD (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365184 ; 365182 ; 365218 ;
Abstract
A non-volatile semiconductor memory is described incorporating a fixed threshold transistor and a variable threshold transistor in each memory cell. The fixed threshold transistor is used for row selection while the variable threshold transistor stores the data. A common memory gate line throughout the memory permits block erase to one logic state with opposite data being written in on a row-by-row basis. Information is read out from a selected row by a ramp voltage on the memory gate line which is capacitively coupled through variable threshold transistors having a channel in the body below the gate region.