说明：  ：简介了研制的随机振动信号处理虚拟仪器系统的组成。叙述了其中的抗混滤波器的作用与要 求，并在分析8 阶低通椭圆开关电容滤波器（MAX293 ）性能的基础上，研制了基于MAX293 的抗混滤 波器。尤其对遇到的“共振”现象作出了理论分析及实验验证，同时给出了解决方法。该抗混滤波器具 有电路简单、变带宽方便、过渡带衰减迅速等优点
(The composition of the developed virtual instrument system of processing a random vibration signal is introduced. The action and demand of the anti alias filter in the system are recounted. After analyzing the 8-order low pass elliptic switched capacitor filter (MAX293), the anti alias filter is developed based on it. Specifically, the“ resonance”phenomenon is analyzed theoretically and the analysis is proved by the experiment. The“ resonance”is avoided. The anti alias filter has the performance of the circuit being simple, the change of the pass band convenient, and the attenuation of the transition band sharp)