Voltage transfer functuon of network

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Homework Help Overview

The discussion revolves around the voltage transfer function of an electrical network involving resistors and capacitors. Participants are examining the formulation of the transfer function and the implications of certain terms in the equation.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are questioning the presence of the (s/RC) term in the numerator of the transfer function. There are discussions about the conversion of components to their Thevenin equivalents and whether the adjustments made to the voltage source were appropriate. Some suggest alternative methods, such as writing nodal equations.

Discussion Status

The discussion is active, with participants providing feedback on the original poster's approach and suggesting areas for reconsideration. There is no clear consensus on the correct formulation, as different interpretations of the problem are being explored.

Contextual Notes

One participant notes a potential issue with the original poster's representation of the circuit components, specifically regarding the adjustments made to the voltage source when calculating the Thevenin equivalent.

jmher0403
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I don't have access to computer right now so here's the link to my working

http://tinypic.com/r/2nhowoo/5
.
According to the answer I shouldn't have (s/RC) term on the numerator, otherwise all good.

Can anyone please point out where i have gone wrong?
 
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You are going to post your image sideways to make it hard to read? I'm not going to bother.
 
[STRIKE]Your math looks okay to me. The s/RC term should be there.[/STRIKE]

EDIT: I take that back! When you converted the first resistor and capacitor to impedance Z, you didn't also adjust V1 accordingly. Essentially you are taking the Thevenin equivalent of v1 and the first R/C section. You need to find both the Thevenin impedance Z and the Thevenin voltage that replaces V1.
 
Last edited:
A strange approach, trying to replace the first R-C section with a series-Z.

Why not just write nodal equations?
 

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