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How to get |Vo/Vs| after finding Vo/Vs

  1. Dec 10, 2017 #1
    1. The problem statement, all variables and given/known data
    This is probably a stupid question, but I'm not too sure how to obtain the "Voltage gain |Vo/Vs| after finding Vo/Vs which I think is called the transfer function".

    I'm doing a question where I found the Vo/Vs but I'm not sure how to turn that into |Vo/Vs|

    2. Relevant equations

    3. The attempt at a solution


    The correct answer given to us is below

    The answer seems to have squared top and bottom and taken the square root of the bottom? Not entirely sure what's the general method for this.
  2. jcsd
  3. Dec 10, 2017 #2


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    Staff: Mentor

    Consider first the denominator. It is a complex number, and has a Real component and an Imaginary component. You can sketch it. To find the magnitude of a complex number, use Pythagoras.

    The numerator is also a complex number ....
  4. Dec 10, 2017 #3
    Ah. Got it! Took the magnitude of the top and the bottom. Thank you!
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