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:
Jul. 05, 2011
Filed:
Sep. 28, 2007
Yoshiyuki Iwakura, Kawasaki, JP;
Shogo Fujimori, Kawasaki, JP;
Tendou Hirai, Kawasaki, JP;
Hitoshi Chida, Kawasaki, JP;
Kazuyoshi Kanei, Kawasaki, JP;
Koutarou Nimura, Kawasaki, JP;
Yoshiyuki Iwakura, Kawasaki, JP;
Shogo Fujimori, Kawasaki, JP;
Tendou Hirai, Kawasaki, JP;
Hitoshi Chida, Kawasaki, JP;
Kazuyoshi Kanei, Kawasaki, JP;
Koutarou Nimura, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An object is to simplify a power supply noise analysis model of a circuit board. CAD data of the circuit board is obtained from a CAD apparatus, and overlapping power supply islands among power supply islands existing in different layers of the circuit board are extracted as a power supply pair. Nodes are arranged in the extracted power supply pair, and the nodes of the power supply pair are projected on the power supply islands to which the power supply pair belongs. A mesh region which encloses each node is determined for each power supply island, and impedance (L, R, C) between nodes is calculated. Then, a power supply noise analysis model is created based on the impedance between nodes in each layer, and a capacitance between layers.