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:
Jun. 20, 2006
Filed:
Jul. 22, 2004
Jimmy Lawson, San Jose, CA (US);
David Karchmer, Los Altos, CA (US);
Marwan A. Khalaf, San Carlos, CA (US);
Jimmy Lawson, San Jose, CA (US);
David Karchmer, Los Altos, CA (US);
Marwan A. Khalaf, San Carlos, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
A mask-programmable logic device includes some circuitry that is electrically programmable as in conventional programmable logic devices. This allows a user to adjust certain characteristics of programmed devices whose logic functions have been proven and need not change, but which operate in an environment that changes, necessitating different characteristics, without having to redesign the programming metallization layers, and therefore without involving the device manufacturer. The programmable elements may include input/output elements, which may need adjustment because the signal characteristics of the larger system change, or clock circuitry, which may need adjustment because environmental conditions such as changes in the expected operating temperature may affect clock signals in the larger system.