VARIABLE ACCURACY PARAMETER MODELING IN STATISTICAL TIMING

摘要

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.

主权项

1. A method for performing statistical static timing analysis for an integrated circuit design comprising:
computing at least one mean timing value of said integrated circuit design using a relatively high-accuracy timing calculation; and computing at least one statistical sensitivity of said at least one mean timing value by taking a finite difference of relatively lower-accuracy timing calculations.