GAIN and IMPEDANCE of a complex Circuit

  • Thread starter JamesJames
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  • #1
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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 ?

James
 

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Answers and Replies

  • #2
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To view the attachment, just click on it and say open.

Any help would be really useful.

Thanks, James
 
  • #3
ehild
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Zab=(R/jwC)/(R+1/jwC),

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



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 ?

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

ehild
 

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