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Homework Help: Circuit analysis, determing impendance.

  1. Feb 20, 2009 #1
    1. The problem statement, all variables and given/known data

    I need to find the impedance of the following circuit:
    1zsysg.jpg

    2. Relevant equations

    [tex]\frac{1}{Z_eq}=\frac{1}{Z_1}+\frac{1}{Z_2}[/tex]
    [tex]Z=R[/tex]
    [tex]Z=\frac{1}{i \omega C}[/tex]

    3. The attempt at a solution

    This should be really simple, but I seem to have some troubles. So: [tex]\frac{1}{R}+i \omega C=\frac{1+i \omega CR}{R}[/tex] and then [tex]Z_eq=\frac{R}{1+i \omega CR}[/tex]. But the answer seems to be wrong.
     
  2. jcsd
  3. Feb 20, 2009 #2
    That's the answer I got when I calculated it. I tried it with test values it was consistent. Why do you think it's wrong?
     
  4. Feb 21, 2009 #3
    As I said this should be really simple, I just get the wrong answer for the calculation, that this impedance is part of. Maybe it helps if I post the whole problem?

    Edit: I found out my Laplace tranformation for the circuit was wrong. I got the right answer now. Thank you.
     
    Last edited: Feb 21, 2009
  5. Feb 21, 2009 #4
    Sorry I couldn't help more. Glad you figured it out :biggrin:
     
  6. Feb 22, 2009 #5
    You did plenty enough. I was sure the problem was there, but your confirmation made go trough every step. Thank for the help!
     
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