Algebraic Manipulation

  • Thread starter Schniz2
  • Start date
  • #1
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Homework Statement



Somehow the upper two statements are manipulated to get the lower one but i cant work out how.... (see attatched image)

Homework Equations



N/A

The Attempt at a Solution



Oh you dont want to see mypages of scribble. I cant get close to that expression!
 

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Answers and Replies

  • #2
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In the first two equations you have expressions that are both equal to VCC/3, so you can equate the two expressions on the left sides.

Doing that, you can solve for RBB as a constant multiple of RE.

Then, substitute in either of your first two equations to get the desired equation in VBB, Vf, and VCC.
 
  • #3
19
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ahh, finally got it... the last time i tried to do it that way i got and extra factor somehow and that's what was messing me up.

thanks!
 

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