Help needed with transfer function for two stage rc ladder network!

Discussion in 'Homework Help' started by AaronR84, Oct 20, 2013.

  1. AaronR84

    Thread Starter New Member

    Sep 14, 2013
    13
    0
    Hello to all, I am working on a lab experiment and find myself beating my head up against a wall trying to find the transfer function for cct D in the attached image. With R = 1kohm and C = 0.1uF (Both R's and C's) the magnitude of the transfer function should be 1/3 at a frequency of 10000 rad/s. I know this to be true from my multisim simulation. Every method I have used to calculate the transfer function has been incorrect so far, I even asked the TA from lab for the transfer function, and the her's was also incorrect. Can someone please help me out?

    Thanks so much in advance, Aaron.
     
  2. LvW

    Active Member

    Jun 13, 2013
    674
    100
    Aaron - you have mentioned circuit D only.
    Therefore, I assume you have solved circuit C.
    I am sure you have realized that C and D have the same structure - so what is the problem with D ?
     
    AaronR84 likes this.
  3. AaronR84

    Thread Starter New Member

    Sep 14, 2013
    13
    0
    I am going about obtaining the transfer function the same way for cct c and d, by performing kcl @ Vo and @ the node between Vo and Vi, but I keep going wrong somewhere on D. I will try recalculating cct D while looking more closely at what I did on cct C and post my calculations up if I don't get any further. Thanks for the help!
     
  4. AaronR84

    Thread Starter New Member

    Sep 14, 2013
    13
    0
    Eureka! I looked over how I got H(s) for cct C and then cct D came out correct, THANKS!
     
  5. LvW

    Active Member

    Jun 13, 2013
    674
    100
    My gratulation!
     
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