Design of parasitic-insensitive four-phase wave SC filters

Design of four-phase wave SC filters using modular building blocks is presented. The proposed building blocks and filters are all parasitic-insensitive. The number of operational amplifiers is essentially low in comparison with earlier presented parasitic-insensitive wave SC filters. Since adaptor equations of wave digital filters are realised, the sensitivities to element variations are low. The simulation results are in good agreement with the theory.