In the signal integrity industry, S-parameters have become the most commonly distributed models for simulating passive components. Because S-parameters are frequency-domain values, many signal integrity engineers are finding it difficult to accurately implement these parameters in time-domain simulations. Addressing transient convolution specifically, this paper will demonstrate the need for a new impulse response model and propose a file format for it. The paper will also solve another difficult problem by presenting a groundbreaking new technique for converting band-limited S-parameters into causal, passive, and leakage-free impulse response models that preserve accuracy to the maximum frequency of the original S-parameters.

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