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:
May. 06, 2008
Filed:
Jan. 03, 2007
Michael D. Hutton, Mountain View, CA (US);
Bruce Pedersen, Sunnyvale, CA (US);
Sinan Kaptanoglu, Belmont, CA (US);
David Lewis, Toronto, CA;
Tim Vanderhoek, Toronto, CA;
Michael D. Hutton, Mountain View, CA (US);
Bruce Pedersen, Sunnyvale, CA (US);
Sinan Kaptanoglu, Belmont, CA (US);
David Lewis, Toronto, CA;
Tim Vanderhoek, Toronto, CA;
Altera Corporation, San Jose, CA (US);
Abstract
A programmable logic element grouping for use in multiple instances on a programmable logic device includes more than the traditional number of logic elements sharing secondary signal (e.g., clock, clock enable, clear, etc.) selection circuitry. The logic elements in such a grouping are divided into at least two subgroups. Programmable interconnection circuitry is provided for selectively applying signals from outside the grouping and signals fed back from the logic elements in the grouping to primary inputs of the logic elements in the grouping. The programmable interconnection circuitry limits possible application of at least some of these signals to one or the other of the subgroups, and/or provides for possible application of at least some of these signals to a greater percentage of the primary inputs to one of the subgroups than to the other.