Condenser microphone output

Discussion in 'The Projects Forum' started by racarrasco, Dec 5, 2015.

  1. racarrasco

    Thread Starter New Member

    Dec 5, 2015
    4
    0
    mic circuit.PNG

    Here is how the specifications show that the microphone is supposed to be powered and used.

    But here is how I have my microphone outputing a signal.
    mic-setup.png
    C1 and D1 are still the same as the the capacitor and the diode in the first figure, I couldn't find the exact elements in my circuit creator software. What is wrong (if any) with this configuration? We were still able to see a signal on an oscilloscope.
    Thank you.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
  3. racarrasco

    Thread Starter New Member

    Dec 5, 2015
    4
    0
    Thank you Bertus, I made a mistake with my circuit, this is how we configured it
    mic-setup.png
    And we did not modify the electret microphone, it was left like this. Do you think that the signal from the microphone is being inverted because it is this way?
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
    Hello,

    When R1=R2 , the signal output will be about half the amplitude.
    The phase will be 180° shifted on the lower side.

    Bertus
     
  5. racarrasco

    Thread Starter New Member

    Dec 5, 2015
    4
    0
    Thank you so much Bertus this clears up so much confusion in my project.
     
Loading...