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在反馈放大电路设计时，采用数字电位器X9C503与外部按键配合，达到了A、B两相电路的对称性。
In order to ensure A phase and B phase circuits are symmetric, digital potentiometer X9C503 with exterior pressed key in the feedback amplification circuit is designed.
在电路设计中主要包括开关电容采样的全差分运放组成的采保增益电路和两相时钟控制的带预放大器的锁存比较器。
The key circuit design includes a sample-and-hold gain circuit using switched-capacitor to sample or hold the signal and a preamplifier-latch comparator using two-phase clock.
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