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Wavelet-based high-order adaptive modeling of lossy interconnects

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2 Author(s)
Grivet-Talocia, S. ; Dipt. di Elettronica, Politecnico di Torino, Italy ; Canavero, F.

This paper presents a numerical-modeling strategy for simulation of fast transients in lossy electrical interconnects. The proposed algorithm makes use of wavelet representations of voltages and currents along the structure, with the aim of reducing the computational complexity of standard time-domain solvers. A special weak procedure for the implementation of possibly dynamic and nonlinear boundary conditions allows one to preserve stability as well as a high approximation order, thus leading to very accurate schemes. On the other hand, the wavelet expansion allows the computation of the solution by using few significant coefficients which are automatically determined at each time step. A dynamically refinable mesh is then used to perform a sparse time-stepping. Several numerical results illustrate the high efficiency of the proposed algorithm, which has been tuned and optimized for best performance in fast digital applications typically found on modern PCB structures

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Electromagnetic Compatibility, IEEE Transactions on  (Volume:43 ,  Issue: 4 )