The reference capacitor can charge at a third clock phase, thus the input signal is released from the capacitor dependently from the voltage.

参考电容器可以在第三时钟相位放电，这样输入信号依赖电压从电容器被释放。

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While it is charging, a voltage comparator constantly compares the voltage across the capacitor to a reference voltage.

当充电时，一个电压比较器就不断地将通过电容器的电压和一个参照电压进行比较。

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Vref:This is the reference output. It provides charging current for capacitor CT through resistor RT.

这是参考输出。它提供了电容CT充电电流通过电阻RT。

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