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. 07, 2006
Filed:
May. 12, 2003
David J. Hathaway, Underhill Center, VT (US);
Lawrence Kenneth Lange, Wappingers Falls, NY (US);
Chandramouli Visweswariah, Croton-on-Hudson, NY (US);
Patrick M. Williams, Poughkeepsie, NY (US);
David J. Hathaway, Underhill Center, VT (US);
Lawrence Kenneth Lange, Wappingers Falls, NY (US);
Chandramouli Visweswariah, Croton-on-Hudson, NY (US);
Patrick M. Williams, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Disclosed is a method for achieving timing closure in the design of a digital integrated circuit or system by selecting portions of the circuit or system to be optimized and portions of the circuit or system in which the effects of such optimization are to be analyzed during the optimization process. Optimized portions will include gates whose design parameters are to be changed, a first analyzed portion includes gates whose delays and edge slews are to be recomputed, and a second analyzed portion includes gates whose ATs and RATs are to be recomputed during optimization. Constraints are imposed at selected boundaries between these portions to prevent unwanted propagation of timing information and to ensure the validity of timing values used during optimization. Through this selection, the size of the problem posed to the underlying optimization method will be reduced, allowing larger circuits or systems to be optimized and allowing optimization to be performed more quickly.