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. 29, 2012
Filed:
Jul. 09, 2009
Ken Wadland, Grafton, MA (US);
Sean Bergan, Andover, MA (US);
Randall Lawson, Westford, MA (US);
Keith Woodword, San Diego, CA (US);
Richard Woodward, San Diego, CA (US);
Ken Wadland, Grafton, MA (US);
Sean Bergan, Andover, MA (US);
Randall Lawson, Westford, MA (US);
Keith Woodword, San Diego, CA (US);
Richard Woodward, San Diego, CA (US);
Cadence Design Systems, Inc., San Jose, CA (US);
Abstract
Local constraints on placement of routing objects for direct connections between terminals in a circuit layout are determined from global constraints on the placement of the routing objects in a process referred to as global constraint budgeting. An autorouter finds paths in the layout to satisfy the local constraints and ignores the global constraints. The local constraints are updated before each routing pass to ensure that routes are completed on individual direct connections while also satisfying the global constraint.