Engineering Transfer function of Op-Amp circuit

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The discussion revolves around deriving the transfer function of an Op-Amp circuit for Bode plotting. Participants emphasize the importance of expressing the transfer function in terms of jw, avoiding complex conjugates, and ensuring the numerator is suitable for Bode plots. There is confusion regarding the representation of poles and the correct starting point for magnitude on the semilog plot, with clarification that a pole at the origin results in a continuous -20 dB/decade slope. The conversation highlights the significance of accurately calculating and plotting the gain and phase, with one participant successfully using a calculator to determine the magnitude at a specific frequency. Overall, the focus remains on achieving the correct form for effective Bode plotting.
  • #31
Maylis said:
View attachment 69736

Just to show you what was going on in my head.

Some great news as a result of telling me to find the magnitude at w=10^7 rad/s. I just imputed the function into my calculator, and I discovered that my calculator is able to find the magnitude of complex expressions. Then I just did 20 log [magnitude] and got 60 dB! I never knew.

Coolsville!
But - I literally can't make he
 
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  • #32
Maylis said:
View attachment 69736

Just to show you what was going on in my head.

Some great news as a result of telling me to find the magnitude at w=10^7 rad/s. I just imputed the function into my calculator, and I discovered that my calculator is able to find the magnitude of complex expressions. Then I just did 20 log [magnitude] and got 60 dB! I never knew.

Coolsville! Do you undrstand why w=1e7 is a good choice? Not too big, not too small? That's critical.

But - I literally can't make heads or tails of your latest attachment. It's sideways & half is missing.
 
  • #33
No I was just showing the number 10 on top with the db underneath that was all the image was supposed to be.

Does the phase plot look good?
 

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