Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Supply voltages to N and P type semiconductors

  1. Oct 24, 2011 #1
    Ok, maybe someone can point me in the right direction ...hopefully anyway.

    I know this is probably a really stupid question, but as Mr Mackey in South Park said - "there are no stupid questions, just stupid people", so here it is.

    I was in class simulating N and P type CMOS devices using OrCAD. When I had the N type going, we supplied a positive voltage to it (0->5V sweep) and for the P type, we connected a negative voltage (0 -> -5V).

    So, simply, why is it a positive voltage for N type, and a negative voltage for P type.

    A basic question I am sure, but one I don't fully understand.

    Thanks in advance.

    Oh, sorry if this is explained somewhere ...I took a qucik look through the Transistor sticky at the top, but some of the links wouldn't open on this PCs

    Thanks again.

    Seán
     
  2. jcsd
  3. Oct 24, 2011 #2

    es1

    User Avatar

    This can be a super in-depth question if one really wants to get into it. But this is a pretty good layman's answer:

    http://answers.yahoo.com/question/index?qid=20080222020750AAXLSAn


     
  4. Oct 24, 2011 #3
    Actually, that's spot on!

    Cheers.

    Seán
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Supply voltages to N and P type semiconductors
  1. N-type semiconductor (Replies: 6)

  2. P type semiconductor (Replies: 5)

Loading...