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DTMF Detection circuit

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  • sunil_phd
    Hi! I am interested in detecting DTMF tones generated by my PC s sound card using the Holtek s HT9170B Tone receiver IC. I have tried the circuit given in
    Message 1 of 1 , Jun 6, 2002
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      Hi!

      I am interested in detecting DTMF tones generated by my PC's sound
      card using the Holtek's HT9170B Tone receiver IC. I have tried the
      circuit given in HT9170B data sheet, but unsuccessful.

      Please help me in finding correct interface between PC's sound card
      and Tone In of HT9170B.

      Thanks and looking for urgent help.

      Sunil Jha
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