A simplified design‐oriented analysis of switched‐capacitor active filters

Abstract

AbstractThe method presented in this paper provides a simplified approach to obtain the z‐domain equivalent circuit of an SC active filter by one‐for‐one substitution of each basic SC element with its z‐domain equivalent admittance, if a specific terminal condition is met. Then, traditional circuit analysis techniques can be used to derive the z‐domain transfer function of the filter. This method makes the analysis and the design of the SC active filter simple and similar to the S‐domain method. Two application examples are given.