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
    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 ?

  2. Shagas

    Active Member

    May 13, 2013
    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