Why do we need A Resistor in this Circuit ?

Discussion in 'General Electronics Chat' started by tallo, May 31, 2013.

  1. tallo

    Thread Starter New Member

    Mar 4, 2011
    12
    0
    Hi everyone,

    In the sound detector circuit we use Microphone to convert the audio signal to electrical signal and then pass it through a high pass filter to remove dc offset
    but i can use only capacitor to do this job ! why we need a resistor in parallel with it ?

    thanks
     
  2. Shagas

    Active Member

    May 13, 2013
    802
    74
    Post the schematic

    If you just use a capacitor then you are just coupling the signal to remove DC offset , If you are using a cap in series and resistor in parallel then it's going to become a high-pass filter (I think)
     
    Last edited: May 31, 2013
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