Nonlinear Two-Port Network DC Model for Fet

On base of the decomposition of function from many varyables on simple in dimensions functions a classification of nonlinear models is entered for a family of the formal models of nonlinear devices in class of Volterra-Wiener systems. DC models for FET are built as nonlinear two-port networks in classes A, AB, B and C operations. Bernstein polynoms are used for the monotone approximation of measured output and transfer characteristics, which can be used in further identification processes.