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. 19, 2000
Filed:
May. 26, 1999
Applicant:
Inventors:
Robert Bielby, Pleasanton, CA (US);
Krishna Rangasayee, Mountain View, CA (US);
Brad Ishihara, Sunnyvale, CA (US);
Assignee:
Altera Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
326 38 ; 326 39 ; 326 40 ;
Abstract
A programmable logic device has buffers that may be selectively programmed for Schmitt-triggered and threshold-triggered operation. The programmable Schmitt-triggered buffers are connected to circuit nodes that are sensitive to noisy environments. The programmable threshold-triggered buffers are connected to circuit nodes that have critical timing requirements.