help me with diode equation ?

Discussion in 'Homework Help' started by unclebehrooz, Oct 1, 2012.

  1. unclebehrooz

    Thread Starter New Member

    Oct 1, 2012
    2
    0
    our Professor asked me to prove the equation of dynamic resistance of diode , he want me to explain him where did the equation come from !


    the equation is this : [r]_{}[/AC]=[n.[V]_{}[/T]]/[/_{}[/Q]]

    r is for resistance
    [V]_{}[/T] stands for thermal voltage
    _{}[/Q] is the I at operating point of diode

    so if you know how it has made , please let your friend knows it too :)
     
  2. WBahn

    Moderator

    Mar 31, 2012
    17,777
    4,805
    It's hard to follow your notation. How about making it a bit easier for those whom you are asking for free assistance and format your equations using tex. There's a sticky at the top of the Homework Help forum that tells you how.
     
    unclebehrooz likes this.
  3. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    657
    Here's a hint: Dynamic resistance is dV/dI (change in voltage divided by change in current).
    Do you know the diode equation?
     
    unclebehrooz likes this.
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