Transformation of Ladder Based All Pass and Biquad Filters into Active All Pass and Biquad Filter using CFOA

摘要

In this paper ladder based all pass and biquad filters are transformed into CFOA based all pass and biquad filters. The ladder based approach is used for design of prototypes. The new circuits have attractive properties of greater linearity, high dynamic rate, high slew rate and high signal bandwidth. A new technique for the conversion has been proposed. The technique uses signal flow graph and converts the existing LC ladder based filter into CFOA based configurations. The design of all pass and Biquad filter has been realized using the proposed technique. The proposed configuration is implemented using CFOA as an active device and all the capacitors are grounded. The new configurations are suitable for various signal processing applications. Simulation has been carried out using simulation software PSpice (v10.2). The simulation results have been demonstrated and discussed.