Signal integrity analysis has become imperative for high-speed designs. In this paper, we present a new technique to advance Krylov-space-based passive model-reduction algorithms to include distributed interconnects described by telegrapher's equations. Interconnects can be lossy, coupled, and can include frequency-dependent parameters. In the proposed scheme, transmission-line subnetworks are treated with closed-form stamps obtained using matrix-exponential Fade, where the coefficients describing the model are computed a priori and analytically. In addition, a technique is given to guarantee that the contribution of these stamps to the modified nodal analysis formulation leads to a passive macromodel.

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Keywords Circuit simulation, Distributed networks, Frequency-dependent parameters, High-speed interconnects, Krylov-subspace techniques, Model reduction, Transmission lines
Persistent URL
Journal IEEE Transactions on Microwave Theory and Techniques
Dounavis, A. (Anestis), Gad, E. (Emad), Achar, R, & Nakhla, M.S. (2000). Passive model reduction of multiport distributed interconnects. IEEE Transactions on Microwave Theory and Techniques, 48(12), 2325–2334. doi:10.1109/22.898981