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Late Breaking Results: Training-Free CCS Library Generation via Voltage Domain Transformation and PCHIP Interpolation
DescriptionAccurate timing-library generation across PVT conditions has become increasingly expensive in advanced technology nodes. This paper introduces a robust, training-free method for inferring CCS library entries at target PVT corners by interpolating voltage waveforms, rather than currents, using shape-preserving interpolation. By working in the voltage domain, the approach avoids the instability and outliers often seen in ML-based current prediction and produces physically consistent results. Experiments on the ASAP7 and CAD Contest datasets show that our method outperforms leading ML regressors, reducing CCS error by more than 100×. The result is faster, safer digital signoff with minimal additional characterization overhead.