Addressing High-speed Interconnect Issues in Asymptotic Waveform Evaluation

High-performance interconnect analysis is gaining in importance for the systems designer. Asymptotic Waveform Evaluation (AWE) has been efficiently applied to the simulation of interconnect networks. In this paper, high frequency errors and issues of instability in AWE simulation are addressed and solutions presented. An improved method for generating the Taylor´s moments for distributed interconnect networks is given, resulting in improved accuracy. The new moment method is further combined with Complex Frequency Hopping (CFH), a multi-point moment-matching technique, to generate as many extra poles as are needed for accurate simulation of high performance circuits. CFH allows for a complete accuracy/CPU trade-off at much less cost than full simulation of distributed networks.