1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Determine the reverse saturation current for the diode

  1. May 1, 2015 #1
    Determine the reverse saturation current for the diode below, given that VS = 5V, R = 360Ω produces a diode current of 10mA. Use h = 1.3 and VT = kT/q = 25mV.
    WMPfQgx.jpg

    I believe this is the formula needed.
    Id = Is(e^(VD/(h*25mV))-1)

    The problem I had was I've done several questions similar to this but I was always given the Is (the reverse saturation I believe). But this time it's the reverse.

    I've tried to solve this by retracing from

    10mA = Is(e^(0.7/(1.3*25mV))-1)

    (0.7V was supplied one time, since i needed to find other VD when Id(mA) = 1, 5, 10, 20)

    and the answer I got was 4.43x10^-12

    Seemed right until I put the numbers back in and tried getting the VD. I think i got somewhere around 662V or something instead of 0.7.

    Any idea how to go about this?

    Much thanks in advance!
     
  2. jcsd
  3. May 1, 2015 #2

    NascentOxygen

    User Avatar

    Staff: Mentor

    That's the value of IS that I calculate.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Determine the reverse saturation current for the diode
Loading...