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. 27, 2011
Filed:
Jul. 17, 2008
Cynthia Rae Eisner, Zichron Yaacov, IL;
Karen Frida Yorav, Haifa, IL;
Cynthia Rae Eisner, Zichron Yaacov, IL;
Karen Frida Yorav, Haifa, IL;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A novel and useful method of functional verification of power gated designs by compositional reasoning. The method of the present invention performs a sequential equivalence check between the power gated design and a version of itself in which power gating is disabled. A compositional approach is first used to look for conditional equivalence of each functional block of the circuit (and its corresponding functional block with power gating disabled) under a suitable set of assumptions, guaranteed by the neighboring functional blocks. Circular reasoning rules are then employed to compose the conditional equivalences proved on the individual functional blocks back into total equivalence on the whole circuit.