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Frequency Selective Model Order Reduction via Spectral Zero Projection

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3 Author(s)
Alam, M. ; Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX ; Nieuwoudt, A. ; Massoud, Y.

As process technology continues to scale into the nanoscale regime, interconnect plays an ever increasing role in determining VLSI system performance. As the complexity of these systems increases, reduced order modeling becomes critical. In this paper, we develop a new method for the model order reduction of interconnect using frequency restrictive selection of interpolation points based on the spectral-zeros of the RLC interconnect model's transfer function. The methodology uses the imaginary part of spectral zeros for frequency selective projection and provides stable as well as passive reduced order models for interconnect in VLSI systems. For large order interconnect models with realistic RLC parameters, the results indicate that our method provides more accurate approximations than techniques based on balanced truncation and moment matching with excellent agreement with the original system's transfer function.

Published in:

Design Automation Conference, 2007. ASP-DAC '07. Asia and South Pacific

Date of Conference:

23-26 Jan. 2007