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:
Apr. 18, 2000
Filed:
Aug. 04, 1997
Mutsumi Shimazaki, Tokyo, JP;
Mitsubshiki Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Upon a transient analysis simulation, if a time step between calculation points is relatively small, a forced quit error occurs, which leads to deterioration of development efficiency. A voltage v.sub.n at a calculation point t.sub.n is obtained by solving a circuit equation. A change rate in the voltage v.sub.n in a step [t.sub.n-1, t.sub.n ] is assumed to be maintained in another step [t.sub.n, t.sub.n+1 ], and a calculation point t.sub.n+1 is temporarily determined so that v.sub.n+1 -v.sub.n is equal to a predetermined value .DELTA.v. The step t.sub.n+1 -t.sub.n is then judged if it falls within a dynamic range of a computer. If the step does not fall within the dynamic range, the calculation point t.sub.n is moved backward by a predetermined decrement, and the procedure is re-performed. If t.sub.n+1 -t.sub.n falls within the dynamic range, a voltage at the calculation point t.sub.n+1 is calculated.