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4-20mA photodiode circuit

  1. May 27, 2010 #1
    1. The problem statement, all variables and given/known data
    Okay so I've got a photodiode with reverse current linear dependence of 0.3uA/Lux and dark current of 20nA. I need to design a circuit (4-20mA current transmission system) with 4mA at zero light intensity and 20mA at 4x10^4 Lux.

    3. The attempt at a solution
    Struggling! I don't necessarily need a concrete solution, I'd just appreciate some direction!
    Cheers.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
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