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Last Updated on: Monday, July 11, 2016 01:59 PM

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Voltage Comparators Circuits

  • 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. (added 7/06)
  • PRECISION ULTRA LOWER POWER OSCILLATOR
    This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages.
  • Wide Band Zero Cross Detector
    This circuit was designed to convert a low Amplitude 40KHz signal into a clean square wave signal.  It will work with inputs as small as 5mv peak-to-peak or as large as 3 volts peak to peak.  The input frequency can range from a few kilohertz to about 150KHz.

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