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P-N Junction Diode Problem HELP

  1. Apr 27, 2010 #1
    1. The problem statement, all variables and given/known data

    A pn junction diode has saturation current Is= 1e-12 A. What is the current through this diode if a positive voltage 0.68 V is applied to it? (Unit: A)

    2. Relevant equations


    3. The attempt at a solution

    I dont even know where to begin, but i just need a good explanation and how to solve this problem to help me visually learn it. I can't find much info on the web about this problem.

  2. jcsd
  3. Apr 27, 2010 #2


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    You have the value of Is and Vd = 0.68V. The voltage VT is dependent of temperature. It is 26mV at 300 K.
    Do the math.
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