Model topology formulation for nonlinear dynamic behavioral modeling

It remains difficult to generate models for analog circuits with both small and large-signal dynamic behavior. This paper describes a modeling methodology used in a new fully automated, behavioral modeling tool, ascend that starts from the netlist description of a circuit and generates differential algebraic equation (DAE) based behavioral models. These models are able to reproduce both small and large-signal dynamic behavior. The details of the model topology formulation algorithm are described, and a modeling example is given for a better illustration of the modeling procedure. The generated model contains some nonidealities of the original circuit and can be used in system validation.