A general realization method for wave digital filters

The problem of realizing wave digital filter structures from analog two-port lossless ladder networks has been widely studied via the wave flow diagram approach by several authors during recent years. These filter structures generally exhibit low sensitivities to multiplier coefficient variations and improved roundoff noise. This paper presents a simple and systematic design procedure, based on the wave flow diagram and a bilinear transformation, whereby any Foster type LC network can be easily realized in digital circuit structures. Examples using this procedure are given. It is believed that the method described in this paper is fully practical and affords a wide vista for designing wave digital filters based on any type ladder analog filter network.