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:
Dec. 14, 1999
Filed:
Feb. 24, 1998
Applicant:
Inventor:
Ran Dvir, Kfar Saba, IL;
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365103 ; 365 94 ; 365104 ; 365168 ;
Abstract
A column of read-only-memory (ROM) cells is programmed to store two or more bits of information in each cell by forming a plurality of coding (bit) lines adjacent to the column of cells, and selectively connecting the cells to the plurality of coding lines so that the different logic conditions defined by the two or more bits are represented by the coding lines that are connected to a memory cell.