Static timing analyzer with source/drain identification by non-Z procedure

This paper describes an efficient signal flow determination algorithm for static timing analysis at the transistor-level. The false path problem on the transistor-level is closely related to determining transistors´ signal flow. The proposed non-Z procedure greatly contributes to solve such problems. According to the experimental results, the algorithm has determined signal flow direction for nearly 100% of transistors. High percentage of signal flow determination not only contribute to eliminating false paths, but also cuts down on timing analysis running time