| 摘要 |
The multipurpose beam sensor includes a differentiator(3) for generating signal to drive a light emitter(4) by differentiating rectangular pulses generated by a rectangular pulse generator(2), a light receiver(5) for converting light intensity to electrical signal, a schmidt circuit(7) for generating pulse train according to an output signal of the light receiver(5), a S/H circuit(8) for sampling and holding output signal of the light receiver(5).
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