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:
Sep. 30, 1997
Filed:
Dec. 18, 1995
Applicant:
Inventor:
Fung Fung Lee, Milpitas, CA (US);
Assignee:
Altera Corporation, San Jose, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
326 41 ; 326 39 ; 326 47 ;
Abstract
Logic regions in a programmable logic array integrated circuit are interconnected in a closed loop or ring by carry and/or cascade connections. Because such a loop or ring has no ends, a user's logic that uses carry or cascade connections can be placed anywhere along the ring. This eliminates a prior art constraint on the placement of a user's logic on the integrated circuit.