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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