在这些情况下，可向开关加入滤波器来改变信号的频率带宽，或者从发射到DUT的信号中消除有害频率的杂散信号。
In these cases, filters can be added to the switch to modify the signal frequency bandwidth, or spurious signals at unwanted fre quencies can be eliminated from the signal to the DUT.
同时随机化零矢量，通过约束保证平均开关频率等于采样频率。
Zero vectors are randomized with the sample frequency and the average switching frequency equals to sample frequency with some constraint.
介绍了数字化开关电容滤波技术，并设计了可以通过改变开关时钟频率来自由调整中心频率的开关电容带阻滤波器，使中心频率具有很高的精度和稳定度。
Meanwhile, the switched capacitor notch filter is designed, which can adjust center frequency freely by changing the switching clock frequency and make the center frequency highly accurate and stable.
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