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:
Mar. 03, 1998
Filed:
Feb. 07, 1996
Joseph P Kerzman, New Brighton, MN (US);
Kenneth L Engelbrecht, Blaine, MN (US);
Robert J Palermo, Shoreview, MN (US);
Douglas A Fuller, Eagan, MN (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
A method and apparatus for efficiently optimizing a circuit design by substituting identified cells within the circuit design with logically equivalent cells having different drive strengths. The present invention eliminates the need to update the design database and to place and route the circuit design during each design iteration. Rather, an improved extraction tool is provided which incorporates a cell substitution list, and updates the RC file therefrom. The updated RC file is used by the timing analysis tool to determine if the updated design will meet the design specification. After the design meets the design specification, a final place and route may be performed.