On the performance of weighting schemes for passivity enforcement of delayed rational macromodels of long interconnects

This paper focuses on robust black-box macromodeling of electrically long interconnects. These structures can be represented by very compact and efficient models that combine in their constitutive equations both closed-form delay operators and low-order rational coefficients. We present a simple perturbation approach for efficient passivity enforcement of these delayed rational macromodels, and we show how suitable norm weighting schemes may significantly improve in-band accuracy preservation.