New Proposed Algorithms for Nth Order Butterworth Passive Filter Computer-Aided Design

Abstract

Abstract Modeling techniques are presented which allow C++ program to be used for nth order Butterworth passive LPF design. Synthesis of passive networks (ladder networks) is implemented to design any order Butterworth passive Filter. It is shown how these models can be simply interconnected to produce a complete passive LPF design program. CAD program of nth order Butterworth filter is flexible design approach of filters' frequencies and components. New proposed algorithms are presented to achieve the highest flexibility of design the selected order, components and frequencies. Typical examples, for various orders Butterworth passive LPF are presented. The presented algorithms are developed for fast, simple, accurate and flexible design. Experiments show that this method is fast and capable of generating circuits which are more economical than those generated by traditional design approaches because of the high flexibility of choosing the cheapest components.