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:
Aug. 13, 2002
Filed:
Oct. 10, 2000
Applicant:
Inventor:
Sterling Whitaker, Albuquerque, NM (US);
Assignee:
University of New Mexico, Albuquerque, NM (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 1/700 ;
U.S. Cl.
CPC ...
G11C 1/700 ;
Abstract
A high-speed, ultra-dense, via contact programmable ROM based on multiplexor cells is presented. High density is achieved by fully encoding n-bits of address space and programming the core with 2 bits of information per contact through the use of higher order logic techniques. Subfunction encoding is used to make substantial improvement to the area required for ROM structures. The programming is accomplished using via contacts between the top two metal layers. No transistors are used in the programmed core for the ROM, reducing the bit line load and helping to maintain a high level of performance.