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How to find transfer function

  1. Sep 30, 2009 #1
    When i tried to find V_o(s)/V_i(s), i got a transfer function in s domain as,
    degree of denominator was greater than that of numerator.
    please help me find the transfer function of the attached circuit. i eventually need to find the impulse response.
     

    Attached Files:

  2. jcsd
  3. Sep 30, 2009 #2

    berkeman

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    Staff: Mentor

    Welcome to the PF. What transfer function do you get? Show us what you got.

    And why would it maybe be good if the denominator had a higher order than the numerator?
     
  4. Sep 30, 2009 #3
    Thank you for such quick response. I am sorry. What i derived has degree of numerator greater than degree of denominator. the transfer function that i got is, please refer to the attachment and let me know if i'm doing something wrong. thanks
     

    Attached Files:

  5. Sep 30, 2009 #4

    berkeman

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    Staff: Mentor

    I'm not sure (the problem statement schematic is a bit unusual for me), but I think Vi should be at V- input, and the other side of the xtal is grounded (connected to V+ input). Vi is not being fed in through the xtal. Does that give you a better result?
     
  6. Sep 30, 2009 #5
    Vi is connected through the RLC circuit parallel with C_p. Attached is the other equivalent of the circuit. I hope that gives a better idea of the circuit i am trying to analyze. The schematic diagram seems correct according to this attachment. I do not know whether it gives a better result. I have just been asked to find the impulse response. so i was trying to evaluate the transfer function first.
     

    Attached Files:

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