Difference between n-p-n transistor and two diodes in series

Discussion in 'General Electronics Chat' started by i_am_the_thorn, Feb 20, 2010.

  1. i_am_the_thorn

    Thread Starter New Member

    Feb 14, 2010
    10
    0
    What are the fundamental differences between a n-p-n type transistor and two diodes connected in series corresponding to the n-p-n transistor, apart from the metal connection in between....

    can we use some other connector instead of metal to make the behaviour of the two diodes similar to the n-p-n
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,136
    1,786
    The biggest difference is the thickness of the p-layer in an NPN transistor. It is very thin for a reason.
     
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  3. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    No the two junctions have to be physically close enough to create an electric field to sweep the charge carriers across the reverse biased junction. You can't do this by sticking two separate junctions together.
     
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