二极管d2用作栅极保护二极管。
因此，电压经过ESD保护二极管D1A 和D1B接近0V，二极管漏电流均不影响 传感器输出信号。
Thus, the voltage across ESD-protection diode D1A or D1B approaches 0V, and neither diode's leakage current affects the sensor's output signal.
由于两个二极管反向并联，所以此电路能够对任何极性的信号进行保护。
With two diodes in parallel back to back, the circuit will provide protection regardless of the signal polarity.
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