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Last Updated on: Wednesday, April 28, 2010 03:53 PM

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40KHz Ultrasound Receiver
A X100 transistor amplifier is followed by a zero cross detector circuit, using a voltage comparator.  The output is a TTL logic signal, corresponding to the received 40KHz signal.
 

Click on Drawing Below to view PDF version of Schematic

Circuit 40KHz Ultrasound Receiver Circuit designed by David Johnson, P.E. (June 30, 2006)

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