Collector - Emitter Bias Calculation Help

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sparkey2000

Joined Mar 9, 2008
8
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
 

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silvrstring

Joined Mar 27, 2008
159
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
 
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