Engineering RC circuit Transfer Function/bode plot

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The discussion focuses on deriving the transfer function for an RC circuit and comparing theoretical results with measured data. The user struggles with complex algebra necessary to express the transfer function in a suitable form for amplitude and phase calculations. Key points include the transformation of the transfer function into a standard format and the need to simplify it for Bode plot analysis. Users discuss methods for determining gain and phase, as well as discrepancies between theoretical predictions and empirical results. Overall, the conversation emphasizes the importance of algebraic manipulation in analyzing circuit behavior and generating accurate frequency response plots.
  • #31
Jolly good show indeed!

I have plotted the phase!

What do you think?

View attachment phase.pdf

Thanks for all your help rude man!
 
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  • #32
Mitchy190 said:
Jolly good show indeed!

I have plotted the phase!

What do you think?

View attachment 46508

Thanks for all your help rude man!

You're welcome.

Except I'm confused about one thing - your plots look 100% right but the expressions you allegedly used are not.

The phase is not tan-1(1+ωRC) - tan-1(1+ωR3C). I suspect you used the right expression by accident or something similar. Check your Excel for the formulas you actually used.

BTW I wish I had your knowledge of Excel!
 
  • #33
rude man said:
You're welcome.

Except I'm confused about one thing - your plots look 100% right but the expressions you allegedly used are not.

The phase is not tan-1(1+ωRC) - tan-1(1+ωR3C). I suspect you used the right expression by accident or something similar. Check your Excel for the formulas you actually used.

BTW I wish I had your knowledge of Excel!

The formulaes I used are, which are correct right?

arctan(ω*R*C) - arctan(ω*R3*C)

Thanks! Wish I had your knowledge in physics!
 
Last edited:

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