Accurate Timing Analysis using SAT and Pattern-Dependent Delay Models

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Accurate delay modeling beyond static models is critical to garnering better correlation with post-silicon analysis. Furthermore, post-silicon timing validation requires a pattern-dependent timing model to generate patterns. To address these issues, a timing analysis tool was proposed that integrates a data-dependent delay model into its analysis. The approach solves for the delay by using the concept of circuit unrolling and formulation of timing questions as decision problems for input into a SAT solver. The effectiveness and validity of the proposed methodology is illustrated through experiments on benchmark circuits