本文提出了单电容有源RC滤波电路的四类拓扑及八种基本一阶RC网络。将这些网络和拓扑相结合,能产生62个二阶滤波电路,其中的54个未见报导。若用更复杂的一阶RC电路,这种滤波电路的数量将会成倍增加。文中还对滤波电路的性能进行了比较,实验结果证明了理论分析的正确性。 This paper presents four types of topology of single-capacitor active RC filter circuit and eight basic first-order RC networks. Combining these networks with the topology can produce 62 second-order filter circuits, of which 54 have not been reported. With a more complex first-order RC circuit, the number of such filter circuits will increase exponentially. The paper also compares the performance of the filter circuit, the experimental results show the correctness of the theoretical analysis.