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本文应用有源滤波器参数敏感度函数,给出构成有源滤波器的电阻和电容误差对滤波器相位影响的计算方法。指出,在采用工程上易于实现的元件条件下,保证相位计测量通道中两滤波器的相位匹配误差不大于0.01°～0.02°。
In this paper, the parameter sensitivity function of active filter is used to calculate the influence of the resistance and capacitance error of the active filter on the phase of the filter. It is pointed out that the phase matching error of the two filters in the measuring channel of the phase meter should be not more than 0.01 ° ~ 0.02 ° under the condition of easy implementation of the components.