Analytical extraction of small and large signal models for FinFET varactors

In this work we report on the small and large signal behaviour of advanced nMOS varactors fabricated in FinFET technology. This is the first paper showing large signal network analyzer (LSNA) measurements performed on FinFET varactors. These nonlinear measurements are modeled with a lookup table based model that is constructed using an accurate multi-bias small signal equivalent circuit. The validity of the extracted small and large signal models is verified through the very good agreement between measurements and simulations.