Parallel digital models of continuous systems and their application to digital filters synthesis

A method of parallel digital models of continuous systems and their use to digital filtering is discussed. Parallel digital models are based on the approximation of an input sampled function. The spline function is used instead of real sampled one. Convenient methods how to build parallel models are described. In addition, two particular methods for synthesis of digital filters are presented. Theoretical results have been veryfied on concrete applications.