Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: GAIN and IMPEDANCE of a complex Circuit

  1. Oct 14, 2004 #1
    I am supposed to calculate the gain of the circuit given in the attachment. I have attached it in a word file.

    Z is the generic term for the effective resistance. I get that Z is

    Z = [jwL +(R/jwC)]/(R+1/jwC)

    Can someone tell me if this is correct?

    Also, now for the gain, it is supposed to output Voltage/input voltage. For this example, is Z the output voltage and jwL + Z the input voltage ?


    Attached Files:

    Last edited: Oct 14, 2004
  2. jcsd
  3. Oct 14, 2004 #2
    To view the attachment, just click on it and say open.

    Any help would be really useful.

    Thanks, James
  4. Oct 14, 2004 #3


    User Avatar
    Homework Helper


    Z = [jwL +(R/jwC)/(R+1/jwC)]

    GRRRRRR. Z is impedance, not voltage. The output voltage is Vo * Zab/Z. So the gain is the magnitude of Zab/Z.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook