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:
Dec. 21, 2010
Filed:
Mar. 19, 2008
Osamu Moriyama, Kawasaki, JP;
Osamu Moriyama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A model generation method for generating a semiconductor device model used for power supply noise analysis, is performed by, calculating noise values for various circuit elements based on current source noise waveforms calculated in accordance with a current flowing from a power supply when a state of the elements changes, determining the time when the change of state of the elements causing the current source noise occurs in relation to successive timing windows each having a predetermined time width, and calculating noise by unit time and adding up for each divided unit time the noise value calculated for all elements whose timing window is present in the unit time, wherein a timing determination unit determines the worst case and other noise generation timing based on the noise generated in each unit time.