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:
Apr. 02, 2002
Filed:
Oct. 02, 2000
Bruce B. Pedersen, San Jose, CA (US);
John C. Costello, San Jose, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
A macrocell for a programmable logic device includes circuitry for allowing a neighboring macrocell to borrow various numbers of the product terms of the macrocell. The macrocell can continue to make full use of its product terms that are not thus borrowed. This includes logically combining and registering the unborrowed product terms. The macrocell may include circuitry for feeding back to the AND array of the programmable logic device a combinatorial or registered signal of the macrocell, and also outputting such a combinatorial or registered signal from the macrocell. When a combinatorial signal is fed back, the register of the macrocell can be used for another signal of the macrocell.