Title :
Computing delay correlations in SSTA
Author :
Wu, Zeqin ; Maurine, Philippe ; Azemard, Nadine ; Ducharme, Gille
Author_Institution :
LIRMM, Univ. of Montpellier II, Montpellier, France
Abstract :
Statistical Static Timing Analysis (SSTA) is becoming necessary, but has not been widely adopted due to various weaknesses. In this paper, we address one of the challenging problems in SSTA: computation of correlations between cell delays. With the help of conditional moments, cell-to-cell and path-to-path delay correlations are computed by propagating iteratively means and variances of cell delays. This technique of computation allows considering the effects of cell topology, input slope and output load values. Numerical results are presented to quantify its accuracy.
Keywords :
delay circuits; integrated circuit design; statistical analysis; SSTA; cell delays; cell topology; cell-to-cell delay; computing delay correlations; conditional moments; path-to-path delay correlations; statistical static timing analysis; Analysis of variance; Delay estimation; Engines; Integral equations; Probability density function; Probability distribution; Propagation delay; Random variables; Timing; Topology;
Conference_Titel :
IC Design and Technology (ICICDT), 2010 IEEE International Conference on
Conference_Location :
Grenoble
Print_ISBN :
978-1-4244-5773-1
DOI :
10.1109/ICICDT.2010.5510277
