Delay-Based Macromodels for Long Interconnects via Time-Frequency Decompositions

We introduce a new macromodeling scheme for electrically long interconnects characterized by tabulated frequency responses. The transfer function of the interconnect is modeled as a superposition of multiple single-delay atoms, which are identified via a selective inversion of a Gabor transform of the raw frequency data. Each atom is then approximated by a delayed rational function, leading to a highly-efficient SPICE-ready macromodel