Input Noise Floor of preamplifiers

Discussion in 'General Electronics Chat' started by naumankalia, May 17, 2016.

  1. naumankalia

    Thread Starter New Member

    Feb 19, 2016
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    Hi all

    I am designing a variable gain pre-amplifier using AD604 at input stage and a band pass filter at AD604 output. I want to calculate theoretically the input noise floor of this whole preamp which will tell me the minimum input signal level detectable by it.

    Can any one kindly guide me how to do it?
     
  2. Lestraveled

    Well-Known Member

    May 19, 2014
    1,957
    1,215
    His first statement is the best, "this can be a real big can of worms so I just going to open it just a little."

     
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  3. naumankalia

    Thread Starter New Member

    Feb 19, 2016
    17
    0
    Thanks for help
     
  4. naumankalia

    Thread Starter New Member

    Feb 19, 2016
    17
    0
    Hi all

    This was indeed a very good tutorial related to Op-amp noise, however my problem is little bit more complicated as i have lot of resistor-capacitors as well as multiple of Op-Amps. Is there any software which can calculate theoretically the input/output noise levels of complicated circuits taking into account the parameters of different components used in it?
     
  5. #12

    Expert

    Nov 30, 2010
    16,298
    6,808
    I think you're looking for a circuit simulator like LTspice, but I'm not sure because I don't simulate.
     
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