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Homework Help: Filter Network - (answer does not match books)

  1. Jul 10, 2006 #1
    I'm not sure what I'm doing wrong here, as my answer does not match up with the books. Sorry about the scan, it looks kinda bad.

    !!! I made a mistake writing the books answer down. It should be:

    [tex] \bar G_v(j \omega ) = \frac{j \omega C (R_1+R_2)+1}{j \omega R_1 +1} [/tex]
    Any help would be awesome! Thanks!

    Last edited: Jul 10, 2006
  2. jcsd
  3. Jul 10, 2006 #2
    You sure it's not:

    [tex]\bar G_v(j \omega ) = \frac{j \omega C (R_1+R_2)+1}{j \omega C R_1 +1}[/tex]

    Anyway, I think your nodal equation is incorrect. KCL states that the sum of all currents flowing out of the node equals to zero. Vi/a and (Vi-Vo)/b are both currents flowing out of the node. So it's supposed to be Vi/a + (Vi-Vo)/b = 0.
  4. Jul 10, 2006 #3

    slapping myself in the head :smile:

    Thanks Rumpelstiltzkin !
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