1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Simple question about KVL Equation in a BJT Circuit

  1. Sep 17, 2011 #1
    1. The problem statement, all variables and given/known data

    I am trying to find the KVL equation for this BJT in order to find Ib.
    http://www.ece.auckland.ac.nz/oasis/a/att/qtatt/2028/2/261/IM010 [Broken]


    2. Relevant equations



    3. The attempt at a solution

    My current equation looks like this.
    Vcc - IcRc - IbRb - Vbe = 0

    I am not entirely sure if this is correct.
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Sep 17, 2011 #2

    rude man

    User Avatar
    Homework Helper
    Gold Member

    1. Is the drop across Rc really just IcRc? (Hint: you're close, but no cigars).
    2. More importantly, what is the relationship between Ib and Ic for a BJT?
     
  4. Sep 17, 2011 #3
    I just thought about it.
    The base current and collector current equals to the emitter current.

    So, the drop across the Rc is actually IeRc?
     
  5. Sep 17, 2011 #4

    rude man

    User Avatar
    Homework Helper
    Gold Member

    Yes. Add the IbRc term to your original equation, don't use Ie.

    Now for part 2?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Simple question about KVL Equation in a BJT Circuit
Loading...