Balancing Accuracy Against Practicality When Correlating Simulation Results

Abstract

Today, circuit speeds are increasing, component sizes are decreasing, and I/O buffers are becoming more complex. Consequently, accurate modeling is becoming more difficult, expensive, and complicated. Good engineering judgment is needed when deciding whether a model is accurate enough. Judgment involves understanding accuracy and precision, the methods of correlation used, and design safety margins. Correlation has two main objectives: the proof of a new EDA tool or theory, and the release of a new product to manufacturing. Each requires different levels of accuracy.