Fast Machine-Learning-Driven Supply Noise-Aware Macromodeling for High-Speed Nonlinear Drivers

Abstract

Emerging domains, such as artificial intelligence, 5G mobile, and automotive, are increasingly reliant on high-speed circuits for efficient processing, in which achieving high operating frequencies and data rates is crucial to enable productive data exchange and rapid responses. High-speed data as well as low noise margin in the high-speed serial links call for efficient models of drivers. In this article, we propose a fast machine-learning-driven macromodel for high-speed drivers, which can efficiently capture the nonlinear characteristics of drivers considering dynamic supply noise with low model complexity. A decoupling-superposition strategy is employed to effectively calculate the impact of power supply noise. Additionally, we introduce a piecewise-segmented method for macromodel solving to further enhance the speed of model utilization. Experimental results demonstrate that compared to HSPICE, the proposed macromodel achieves up to $50\times $ – $1200\times $ speedup while maintaining sufficient accuracy, even for signals with GHz data rate.