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. 14, 2011
Filed:
Aug. 05, 2008
Joachim Keinert, Altdorf, DE;
Juergen Koehl, Weil im Schoenbuch, DE;
Thomas Ludwig, Sindelfingen, DE;
Joachim Keinert, Altdorf, DE;
Juergen Koehl, Weil im Schoenbuch, DE;
Thomas Ludwig, Sindelfingen, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method to reduce the problem complexity maintains a relatively high quality port assignment by abstracting local connections in the macro when performing the port assignment. This is done for netlength, congestion as well as timing. The internal netlist of the macro is abstracted in such a way that the optimization of the external interconnect can be done in an efficient manner. Three levels of abstractions are described. A first level optimizes the top level interconnect, a second level optimizes the top level and macro interconnects, while a third level optimizes the top level timing.