9 Replies Latest reply on May 19, 2016 9:58 AM by user_1377889

    Why i am not able to see my Filter output?

    user_504416177

      Hello Every One,

         

      I am again having a problem and i don't know why :(

         

      The Program is very simple:

         

      I build a program for a Bridge. What i am doing is described below:

         

      1. I am using a waveDAC in order to excite my bridge.

         

      2. output of the bridge is comming into a 12-Bit SAR ADC.

         

      3. output of the ADC if going to the LPF.

         

      4. LPF output is being written into DAC.

         

      Problem: The problem is that my final output is not correct. I am feeding a 10 Khz signal and my cuttoff frequency is 15Khz. But i am not getting a sine signal as i supposed to get.

         

      I also attached and output pic and my program file.

         

      Yellow wave: Excitation Signal.

         

      Purple or Pink Wave: Signal entering into ADC.

         

      Blue Wave: Filter Output seeing through DAC Ch1.

         

      Looking forward for your suggestions!

         

      Best Regards

         

      Awais