文章针对基于微控制器和PC的高速数据采集系统 ,在讨论了信号调理电路功能及必要性的基础上 ,给出了包括信号放大、衰减、隔离和滤波的设计方案 ,并对滤波电路的拓扑设计进行了研究。此外 ,针对广泛存在的电力信号采集与分析 ,以电能质量为分析、研究对象 ,给出了基于Sallen Key和状态变量拓扑的滤波方案。对高速数据采集系统精度的提高和采集设备的保护具有实际意义。 In this paper, based on the high speed data acquisition system based on microcontroller and PC, the design scheme of signal amplification, attenuation, isolation and filtering is given on the basis of discussing the function and necessity of signal conditioning circuit. The topology of the filter circuit Design was studied. In addition, for the wide range of power signal acquisition and analysis, power quality analysis and research object, based on Sallen Key and state variable topology filtering scheme. It is of practical significance to improve the accuracy of high-speed data acquisition system and the protection of collection equipment.