help me with diode equation ?

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

  1. unclebehrooz

    Thread Starter New Member

    Oct 1, 2012
    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


    Mar 31, 2012
    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
    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.