【单选题】【消耗次数：1】
差动霍尔式传感器的输出电压由两个霍尔信号电压叠加而成，因此，转子凸齿与信号发生器之间的气隙可以增大到：
①
（1±0.5）mm
②
（2±0.5）mm
③
（3±0.5）mm
参考答案：
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