a window comparator, outputting a pulse series shape drive signal with given duty ratio based on the detection signal of the sensor and the level comparative result of the magnetic hysteresis level signal;
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a window comparator
窗口比较器
以上为机器翻译结果，长、整句建议使用 人工翻译 。
With a simple window comparator and LEDs the distance between the detector and the object in a wall can be displayed approximately.
用窗口比较器和LED可大致显示墙体中被测物体与探测器之间的距离。
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