Need Help regarding RF Transmitter

Discussion in 'Wireless & RF Design' started by coolbird457, Apr 24, 2009.

  1. coolbird457

    Thread Starter New Member

    Apr 24, 2009
    4
    0
    i am working on a project named wireless mic...

    in first stage i got a simple common emitter to get an amplified audio signal.

    now i need 100MHz radio signal to superimpose the amplified audio signal
    upon it.

    so plz help me how can i design a Transmitter circuit with antenna...

    i 'd be grateful.
     
  2. deepak007

    Active Member

    Sep 30, 2007
    59
    0
    hi

    please take a look at the threads "radio transmitter problem" "rf transmitter" .
     
  3. PRS

    Well-Known Member

    Aug 24, 2008
    989
    35
    What kind of modulation are you wanting to use?
     
  4. coolbird457

    Thread Starter New Member

    Apr 24, 2009
    4
    0
    hello,

    i need frquency modulation ...


    basically its a wirless mic. for which the only legal frequency is 27 MHz

    here.

    can u plz tell me how can i get it or cite some good site for circuit samples (of 27 MHz)?
     
  5. PRS

    Well-Known Member

    Aug 24, 2008
    989
    35
    I know of no samples except someone -- from my bad memory -- posted a circuit on this forum of an rf transmitter/receiver using a capacitor microphone. It was really simple, using the fact that a capacitor mic creates a voltage proportional to the frequency. Look in the archives; use the search thing.

    Check out what 007 said. I think it's just what you want.
     
  6. coolbird457

    Thread Starter New Member

    Apr 24, 2009
    4
    0
    Thanks to both of you....
     
  7. radiohead

    Active Member

    May 28, 2009
    474
    31
  8. radiohead

    Active Member

    May 28, 2009
    474
    31
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