Variable accuracy parameter modeling in statistical timing

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United States of America Patent

PATENT NO 9646122
SERIAL NO

15235168

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Abstract

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Systems and methods compute a mean timing value of an integrated circuit design for variables using a first timing calculation of relatively higher accuracy; and calculate a first timing value of the integrated circuit design for the variables, using a second timing calculation having a relatively lower accuracy. Such systems and methods calculate second timing values of the integrated circuit design for additional sets of variables using the second timing calculation; and calculate finite differences of each of the second timing values to the first timing value. Thus, these systems and methods calculate a statistical sensitivity of the first timing value to the additional sets of variables based on the finite differences. Further, such systems and methods calculate a statistical sensitivity of the mean timing value to the additional sets of values based on the statistical sensitivity of the first timing value to the additional sets of values.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Foreman, Eric A Fairfax, US 85 747
Hemmett, Jeffrey G St. George, US 55 459
Kalafala, Kerim Rhinebeck, US 87 557
Schaeffer, Gregory M Poughkeepsie, US 26 176
Shuma, Stephen G Underhill, US 53 285
Suess, Alexander J Hopewell Junction, US 33 197
Visweswariah, Chandramouli Croton-on-Hudson, US 112 1856
Wood, Michael H Hopewell Junction, US 38 359

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