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2 stage amplifier question

  1. Jun 9, 2016 #1
    1. The problem statement, all variables and given/known data
    Calculate the voltage gain for each stage and the overall voltage gain.

    2. Relevant equations
    Ao (Gain) = - Rf/R1
    3. The attempt at a solution

    For the first stage I got:
    Gain = - 15/10 = - 1.5
    For stage 2 I got:
    Gain = -5.13.3 = -1.55
    Multiplying the 2 together to get an overall positive gain of -1.5 x -1.55 = 2.34
     

    Attached Files:

  2. jcsd
  3. Jun 9, 2016 #2

    LvW

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    Any question?
     
  4. Jun 9, 2016 #3
    Is this the correct method and answer?
     
  5. Jun 15, 2016 #4
    Do I multiply or add the voltage gains for each step?
     
  6. Jun 15, 2016 #5

    LvW

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    Vout/Vin=(Vout/Vx)*(Vx/Vin).
    Sounds logical, doese it not?
     
  7. Jun 15, 2016 #6
    Thank you, yes it does.......
     
  8. Jun 16, 2016 #7

    rude man

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    Homework Helper
    Gold Member

    You can add if you go dB's.
    Meantime, go with post 5.
     
  9. Jun 16, 2016 #8
    Thank you very much!
     
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