Relaxation-based transient sensitivity computations for large-scale MOSFET circuits using Adaptive Direct Approach

Transient sensitivity information is useful in circuit design community and the scales of modern circuits are big. This paper investigates transient sensitivity computations of large-scale MOSFET circuits using relaxation-based algorithms, including Waveform Relaxation (WR) and Iterative Timing Analysis (ITA). These algorithms have been strengthened for efficiency and robustness. This paper also proposes a novel method for sensitivity subcircuit computation, which is derived from the traditional Direct Approach and is called Adaptive Direct Approach. Some related time-saving techniques are proposed, too. All mentioned methods have been implemented and tested to justify their performances.