Noise analysis (flicker noise) of pico Ammeter readings

Discussion in 'General Electronics Chat' started by vikatmev, Aug 21, 2014.

  1. vikatmev

    Thread Starter New Member

    Aug 21, 2014
    M given project to do noise analysis of pico ammeter ADC output. here the input is 1pA DC signal. for which i have nearly 100000 output samples. sampling rate is 3.5Kps. these readings have error percentage nearly 0.178%. So i need to do its noise analysis like i have to detect which types of noises it contain? separation of those noises and actual signal and their plots. frequency ranges of the noises etc. Initially i need to do this in matlab later in VHDL. i dont understand how to proceed. how to do noise analysis? means which parameters we should analyse and how??
  2. ronv

    AAC Fanatic!

    Nov 12, 2008
    Spectrum analyzer?
    The bigger question might be what to do about it. How do you develop the voltage you are measuring?
  3. alfacliff

    Well-Known Member

    Dec 13, 2013
    at those levels, 1PA, every componant will contribute ssignificant noise, how do you intend to filter out the noise from the measurement process itsself?