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Does PNP transistor share the same formulas as an NPN transistor?

  1. Jul 14, 2012 #1

    Femme_physics

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    The formulas in question are:

    Beta = Ic/Ib
    Ie = Ib ( 1 + beta )
    Ie = Ib + Ic
     
  2. jcsd
  3. Jul 14, 2012 #2
    Yes, of course. Though the polarity is reversed. The terminals are named such that those equations are obeyed for both pnp and npn transistors.
     
  4. Jul 14, 2012 #3

    Femme_physics

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    Ahh...got it, so really the only difference is that +Vbe in NPN becomes +Veb in PNP

    Thanks
     
  5. Jul 14, 2012 #4

    sophiecentaur

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    You could ask yourself why the equations shouldn't apply. If you can't come up with a good reason then they would apply.
     
  6. Jul 14, 2012 #5
    This diagram show everything
    96_1250754356.png
     
  7. Jul 15, 2012 #6

    Femme_physics

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    Thanks for the validation :)
     
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