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Dependent sources - can the gain (g) be negative?

  1. Sep 13, 2012 #1
    2zpnig5.png

    So the goal in this case is to find k, the gain of the dependent source shown as a diamond.

    Formula for dependent voltage sources:
    V=g*V0

    In this case
    V=k*Va

    I would get a negative value for k, because k=V/Va=-10V/(0.2A*10Ω)=-5

    But can you have a negative value for k? Is that possible? Or did I get the signs wrong?

    Thanks in advance.
     
    Last edited: Sep 13, 2012
  2. jcsd
  3. Sep 14, 2012 #2

    CWatters

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    Science Advisor
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    Sure you can have negative gain.

    Vo= -K * Vin

    implies an inverting amplifier with gain = K

    If K = 5 and Vin= 2 then Vo = -10
     
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