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Push-pull amplifier

  1. Feb 9, 2008 #1
    1. The problem statement, all variables and given/known data
    1. Calculate Vcc and Vee(should be around 14-16).
    2. Calculate the input resistance. (You should get a high value).
    3. Determine the voltage gain. No calculation is needed.

    [​IMG]


    Ucesat = 1 V
    Poutmax = 10 W
    Rl = 8 ohm
    Icq9=Icq11=40mA
    Re=0.47 ohm
    R8=R9=1000 ohm
    Vbe=0.7V


    2. The attempt at a solution
    1. I used P=U^2/(2*R)=>U=sqrt(P*2*R)=sqrt(10*2*8)=12.65V
    Vcc=U+Ucesat=12.65+1=13.65 but this is less than 14.

    2.Here i don't know how to start.

    3.I don't know how to solve this either.
     
  2. jcsd
  3. Feb 21, 2008 #2
    Can you please repost a clear circuit. It's hard to see. Thanks.
     
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