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audio amp

Discussion in 'Electronic Design' started by nimi, Sep 2, 2006.

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  1. nimi

    nimi Guest

    hi,
    i m trying to design a audio amplifier of frequency range 200 t0 12
    khz, with carbon mic.

    i hav to use op amp mostly, i facing a problem to how to choose
    specific op amp, and how to
    consider all its parameter, where to include any capacitor if any.
    if u hav an answer plz reply.
     
  2. Eeyore

    Eeyore Guest

    Well...... A good place to start would be to consider which aspects of the
    op-amp performance are important to you.

    How familiar are you with these ?

    Graham
     
  3. Did you notice 'carbon mic'? He doesn't need an op-amp; he can just put
    the mic in series with the loudspeaker.
     

  4. And use an adjustable power supply for a volume control, till the
    speaker starts to smoke. ;-)


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  5. Fred Bartoli

    Fred Bartoli Guest

    John Woodgate a écrit :
    So you have the speaker, hopefully speaking loud, then the carbon mic.
    But where do you connect the mic?
     
  6. Well, yes, but I thought he would learn more if I didn't mention that.
    (;-)
     
  7. In message <44f9b4fd$0$31271$>, dated Sat, 2 Sep
    2006, Fred Bartoli
    3 V battery, mic and loudspeaker, all in series. Works best with a 15
    ohm or higher loudspeaker.
     
  8. Eeyore

    Eeyore Guest

    I did but was planning to consider those aspects of his requirement later. In
    fact I was also going to discuss the alternative use of electret capsules since
    carbon mics are no longer used AFAIK.

    I doubt that's what his course work is about though.

    Graham
     
  9. Which reminds me...
    Does anyone do 'optical' microphones, where the movement of a mirror etc
    is measured by bouncing light off it or fringe counting in an
    interferometer?
     
  10. jasen

    jasen Guest

    In seriess with the speaker and dc source.
     

  11. B&K, Makers of fine instruments make a LF one
    http://www.bksv.com/1067.asp


    martin
     
  12. Eeyore

    Eeyore Guest

    The CIA ? MI5, MI6 ? Mossad ? etc.....

    Graham
     
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