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Identification of Highly Efficient Delay-Rational Macromodels of Long Interconnects From Tabulated Frequency Data

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3 Author(s)
Piero Triverio ; Department of Electronics, Politecnico di Torino, Torino, Italy ; Stefano Grivet-Talocia ; Alessandro Chinea

We introduce a novel formulation of black-box models for long multiconductor interconnects, together with an identification algorithm from tabulated scattering parameters. The fundamental assumption requires a modal decomposition matrix that does not depend on frequency. The model structure includes low-order rational coefficients with suitable delay operators. The latter are included in a feedback loop; therefore, all infinite signal reflections are automatically accounted for. This feature may lead to significant speed up factors during circuit-based transient simulation with respect to other state-of-the-art solutions. The model is cast in a delayed descriptor form, leading to a straightforward conversion to an equivalent SPICE-compatible netlist. Finally, a purely algebraic stability test is presented based on a linear matrix inequality. The very high efficiency of the proposed models is demonstrated through several application examples.

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:58 ,  Issue: 3 )