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Noise contribution from an amplifier

Question asked by KKelec on Jul 8, 2013
Latest reply on Jul 10, 2013 by krisf



I am a little confused on how I should measure the total noise contribution from various noise sources when I am using a differential amplifier. The IC that I am using is AD 8009 and I do not know which noise sources to consider (from out of thermal(johnson), input current noise and input voltage noise) and how they should be added to give the final noise in the output, say in terms of the final output voltage.


noisedoubt.jpgThis is the circuit whose noise I want to estimate. The input to this circuit comes from a transimpedance amplifier giving a differential output voltage.


Thanks for the help.