10 Replies Latest reply on Jul 16, 2015 4:50 AM by user_14586677

    Sudden strong noise from the analog OpAmp

    anna.leshinsky

      Hi,

         

      I am building a device that works like a phonograph. I am using a piezo disc as a microphone and a pcos3 kit for the amplifying, filtering and processing . But I a getting a terrible sudden noise at the output of the OpAmp for some seconds.

         

      Maybe somebody knows the reason?

         

      I attached the amplifier circuit.

         

      THANKS!