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??

 

Spectrum analyzer?
The bigger question might be what to do about it. How do you develop the voltage you are measuring?

 

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