分析了电源电磁干扰产生的机理及电源滤波器的作用；
The function of power filter and the mechanism of electromagnetic interference is analyzed.
高频开关电源是严重的电磁干扰源，很多情况下需对其安装emi电源滤波器。
Switch power of high frequency is serious electromagnetic interference (EMI) source, so EMI source filter usually should be added in switch power.
通过采用高隔离度的DC - DC电源和低噪低漂移运放，使用光电隔离和滤波器等设计，采集装置具有了很强的抗干扰特性。
By using DC-DC power source, low drift operational amplifiers, optically coupled isolators and filter design, the system has a good characteristic of anti-disturbance.
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