American V-King Scientific Publishing
In this paper, towards analog and digital elliptic filters, use of transfer function through the choice of a particular filter structure from a set of design specifications to achieve the step change in transfer function analysis. Elliptic filter design with two optimization criteria maximally flat amplitude response and small amplitude ripple response, and the excellent performance of the filter available. There are many different filter design methods discussed in this paper, is the first for the analog method, used in analog filters. The specified frequency response with amplitude response and phase response which obtained through the rational transfer function approximation.