ftd: an exact frequency to time domain conversion for reduced order RLC interconnect models

Authors:
Ying Liu;Lawrence T. Pileggi;Andrzej J. Strojwas
Affiliations:
Department of Electrical and Computer Engineering, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA;Department of Electrical and Computer Engineering, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA;Department of Electrical and Computer Engineering, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA
Venue:
DAC '98 Proceedings of the 35th annual Design Automation Conference
Year:
1998

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Abstract

Recursive convolution provides an exact solution for interfacing reduced-order frequency domain representations with discrete time domain models of piecewise linear voltage waveforms. The state-space method is more efficient, but not exact, and can sometimes produce large time domain errors. This paper presents a new algorithm, ftd (frequency to time domain), for incorporating linear frequency domain macro-models into time domain simulators. ftd provides accuracy equivalent to recursive convolution with efficiency that is superior to the state-space methods.