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:
Nov. 16, 2010
Filed:
Sep. 17, 2007
Kenichi Ushiyama, Kawasaki, JP;
Kenichi Ushiyama, Kawasaki, JP;
Fujitsu Semiconductor Limited, Yokohama, JP;
Abstract
In a circuit design method, a computer calculates power of each of cells, calculates an IR drop value by calculating a voltage decreased due to an IR drop for each cell by using the power for each cell, determines whether a difference between a current IR drop value and a previous IR drop is equal to or less than a predetermined value, and defines a voltage after the IR drop occurs for each cell by using the IR drop value when the difference is greater than the predetermined value. The computer repeats calculating the power, calculating the IR drop value, and defining the value after the IR drop occurs until the difference becomes equal to or less than the predetermined value.