Collector - Emitter Bias Calculation Help

Discussion in 'Homework Help' started by sparkey2000, Aug 5, 2008.

  1. sparkey2000

    Thread Starter New Member

    Mar 9, 2008
    8
    0
    Hi

    I have been trying to calculate this revision question. :confused:

    I have been able to calculate the base current however I need confirmation on how VCE is calculated.

    Many thanks

    Martin
     
  2. silvrstring

    Active Member

    Mar 27, 2008
    159
    0
    Martin,

    Vce = Vcc - Vrc - Vre. Other than that, your work looks good.

    But when using (Beta+1)*Ib=Ie, there will be a greater difference in calculations between the real Ie and Ic as Beta gets lower. I asked my professor about the C-E setup, and he used Beta*Ib = Ic, and then Ic = Ie. Because of the previously mentioned problem, my advice is to use Beta*Ib=Ic when in a low Beta situation. I guess if you really wanted to be a perfectionist, you could do both.

    Take care
     
    Last edited: Aug 6, 2008
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