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Circuit Bench

  • Tone switch (CB9224E)

           This circuit recognizes a tone determined by the tuned input circuit (R3 / R4 / C2). The circuit...

  • 2 Hz Generator (CB25777E)

      This CMNOS crystal-based circuit generates a 2 Hz signal. It was found in the October 1994 issue of...

  • Crystal Oscillator LM339 (CB17186E)

      This is one of the possible configurations using the LM139, 239 or 339 voltage comparators. The...

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