Simple Diode Circuit Problem

Discussion in 'Homework Help' started by Student01, May 9, 2009.

  1. Student01

    Thread Starter Active Member

    Apr 15, 2009
    35
    0
    Could someone please tell me how to solve this? I know it's simple, but the answer I'm getting is different to the one in the book.

    [​IMG]

    Here's my method:
    Io = (Vs - Vd) /R = (IoxR - Vd)/R = (3-0.7)/1k = 2.3mA
    Vd = Vt x ln(Id/Is) = 2.5e-2 x ln (2.3m/1e-13) = 0.596 V

    The correct answer is: 0.603V
     
  2. vvkannan

    Active Member

    Aug 9, 2008
    138
    11
    Should not the diode current be 3ma?

    2.5 x e-2 ln (3/(e-10)) =0.603
     
  3. Student01

    Thread Starter Active Member

    Apr 15, 2009
    35
    0
    Ooooh. Thanks, vvkannan. :)
     
Loading...