ABSTRACT
Wave digital filters (WDF) are designed to simulate analog electronic circuits, and do not use any biquadratic structures. The idea dates to 1970, but the seminal paper published on the topic did not arrive until A. Fettweis’s “Wave Digital Filters: Theory and Practice” in 1986. In electronics, a two-port network is any circuit with an input port and an output port. Two-port theory allows to fully and easily characterize and describe the behavior of the circuit inside the two-port box without knowing anything about the actual circuit itself. The two-port box is sometimes thought of as a “black box” where we can’t see the circuit inside to glean any information about its operation. The WDF components may be connected in any combination of series and parallel topologies. Those familiar with passive analog circuits are familiar with the ladder shapes of these circuits. The simulation of the interconnections of the components is just as important as the simulation of the components themselves.
