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:
Aug. 27, 2002
Filed:
Dec. 10, 1999
Hideaki Ishii, Kawasaki, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
After auto-placement, nets are classified into groups each having logically equivalent signals, terminal placement range of each net is determined, and overlap regions of respective pairs of the ranges in the same group is obtained. In each net of each pair having this overlap region, such an input terminal in the overlap region is found out that an wiring length between an output terminal and the input terminal is maximum (S and S ), and a decrement &Dgr; in wiring length is calculated assuming that the two input terminals found out are exchanged (S ). If &Dgr;>0 (S ), then the two input terminals are exchanged with each other (S ). Such processing is repeated until &Dgr;≦0.