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. 14, 2002
Filed:
Nov. 23, 1998
Hiroyuki Kobayashi, Tokyo, JP;
Yukihiko Shimazu, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An auto placement and routing device lays out wiring with consideration for influences of an increase in an effective coupling capacitance. A layout data generation unit allots signal lines ( to ) to grids ( ), respectively. The signal lines ( ) have a signal attribute B, and the signal lines ( ) have a signal attribute A. Thus, the signal line having the signal attribute A and the signal line having the signal attribute B are placed by turns so that the signal lines having the same signal attribute are not to be adjacent to each other. Accordingly, the potential transitions of the signal lines ( ) adjacent to an observed signal line ( ) do not take place at a time when the potential transition of the observed signal line ( ) takes place. This prevents an increase in the effective coupling capacitance of the observed signal line ( ) due to the potential transitions of the signal lines ( ) adjacent to the observed signal line ( ).