VCO Behavioral modeling based on the Nonlinear Integral approach

This paper presents a new behavioral model for VCO circuits based on a modeling approach originally adopted for the description of the nonlinear dynamic behavior of electron devices. The new VCO model allows a great accuracy in the description of dynamic nonlinear operations and enables many limitations of existing modelling approaches to be overcome. The computational efficiency and the great accuracy of the model makes it suitable for system-level simulations. Results about the model prediction under small- and large-signal conditions and about its efficiency in comparison with transistor-level simulations are provided in the paper.