In this thesis , theory of switched - current ( si ) technology and its application in the design and synthesis of active filters are researched deeply and systematically . some new switched - current building - blocks and exact approach methods of switched - current filters ( sif ) are proposed from modern lc networks and switched capacitor ( sc ) technology 论文深入探讨了开关电流技术及其在滤波器设计中的应用,并以现有无源网络和开关电容技术为基础,提出了一些基于开关电流技术的新型滤波器模块和滤波器设计方法。