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:
Aug. 11, 2009
Filed:
Sep. 29, 2005
Gaurav Shrivastav, Sunnyvale, CA (US);
Stimit K. Oak, Sunnyvale, CA (US);
Gaurav Shrivastav, Sunnyvale, CA (US);
Stimit K. Oak, Sunnyvale, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
A method for determining a maximum IR drop on a power grid of a circuit is disclosed. The method includes dividing a reference timing signal into multiple bins. Each one of the bins having a corresponding bin duration. The bins being divided by a corresponding fuzzy boundaries. Each one of the fuzzy boundaries having a corresponding boundary duration. Each one of the of bins is analyzed including selecting one of the bins, identifying a first set devices that transition to their corresponding maximum current states during the selected bin and identifying a second set of devices that transition to their corresponding maximum current states during at least one of the boundaries of the selected bin, but not within the selected bin. A maximum current demand equal to a sum of the maximum current states of the first and second plurality of devices is calculated. A system for testing a circuit is also disclosed.