Polynomial Approximation of Inhomogeneous Differential Equations for Modeling of Electronic Device

One of forms of description transient processes there are inhomogeneous differential equations in electronic devices. Such equations also are widely used in the theory of control for description of processes in a temporary realm and determination of transmission functions, which allows conducting researches in a frequency area. Therefore development of simple, rapid, reliable and effective methods of their decision remains an actual problem. The method of decision of inhomogeneous differential equations of n-order is described with the use of polynomial approximation. Dignity of method consists in that a method is analogical to the analytical methods of decision of equations, because approximation can be executed on great enough temporal intervals and a temporal step can be set to great enough. Demonstration over of method is brought on the example of decision of inhomogeneous differential equation of the third order. The offered method differs in simplicity, evidentness and comfort for realization on computer.