FFT-based macromodeling of power delivery network with uncertainties using latency insertion method

The generation of frequency-domain macromodels for passive interconnects such as power delivery networks can be computationally expensive. In this work, macromodels are constructed through the Latency Insertion Method in the time-domain before conversion to the frequency domain via the Fast Fourier transform. Results show an improvement in the simulation time as well as good accuracy over the frequency range of interest. The method is used to characterize a power delivery plane with uncertainties in geometry and material properties.