Proofreading Transistors

Discussion in 'Feedback and Suggestions' started by ashare, Apr 1, 2011.

  1. ashare

    Thread Starter New Member

    Mar 7, 2011
    1
    0
    Hi,

    I was going through the transistor page on the website. I feel the information provided in the first paragraph is wrong- http://www.allaboutcircuits.com/vol_3/chpt_4/3.html

    I am referring to the mention of 'pointing' and 'non-pointing' ends of the circuit symbol.
     
  2. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    It's true that that part is a bit confusing. If we refer to the node where the emitter arrow ends as "the pointing end", then it is true that in the NPN transistor has P-type diffusion in the middle and the PNP transistor has P-type diffusion in the endpoints.
    In that way, the e-book is wrong.
     
  3. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    It helps to be specific...

    Actually, I disagree. The verbage is not clear, but it says what it means to say.

    How about this...

    The important thing to note it is the transistor shown in both illustrations is a PNP, and the description refers solely to a PNP transistor. The description is confusing, but is consistent with a PNP BJT.

    If you think you can tweak the verbage to make it clearer please do.
     
    Last edited: Apr 1, 2011
  4. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    That looks much better. The analysis was too deep to begin with for the context of the specific article anyway.
     
  5. debjit625

    Well-Known Member

    Apr 17, 2010
    790
    186
    I agree with Bill....
     
  6. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    Oh Lord! Another thread closed! :D
     
Loading...