Bode Plot Application: Increase Frequency Response & Magnitude Understanding

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Discussion Overview

The discussion revolves around understanding Bode plots, particularly in the context of frequency response and magnitude. Participants explore how to draw Bode plots for specific functions and the relationship between magnitude and phase diagrams.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant expresses difficulty in understanding Bode plots and seeks guidance on advancing their understanding.
  • Another participant provides a link to a Wikipedia article, suggesting that the original poster should study it before returning with specific questions.
  • A participant presents the function (s+1)/(s+2) and asks how to draw its Bode plot.
  • There is a question about whether the magnitude and phase diagrams should be correlated.
  • Some participants argue that the magnitude and phase plots are not equal but are correlated as they represent the same circuit.
  • A mathematical relationship is mentioned, indicating that the magnitude and phase functions are derived from the same frequency-dependent circuit.
  • Participants discuss the need for basic math knowledge to produce graphical representations of magnitude and phase for frequency-dependent networks.
  • There is a request for clarification on the meaning of "s" in the context of the transfer function.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the understanding of Bode plots, with some expressing confusion and others providing differing explanations about the correlation between magnitude and phase diagrams.

Contextual Notes

Participants mention the need for basic math knowledge to understand the concepts discussed, and there are unresolved questions regarding the specific steps to create Bode plots and the interpretation of the transfer function.

SDRFG
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Hello,
After long time i am able to find Laplace transform function but can't understand the bode plot which give information of frequency response and magnitude i think
plaese anyway here how can push my thinking ahead in it?
 
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https://en.m.wikipedia.org/wiki/Bode_plot

You can't get a whole semester course from an online forum. I suggest that you try hard to understand the wiki article linked. After that, you can return here with more specific questions and we will try to help.
 
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ok, there is function s+1/s+2

how to draw bode plot?
You can't get a whole semester course
i was not able to understand at that time.
Bode_High-Pass.PNG
 
Should both diagrams be correlated?
 
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no because one show for phase and another show for magnitude.
 
SDRFG said:
no because one show for phase and another show for magnitude.
Sorry - but this is not an answer to my question (I did not ask if both are "equal").
The complete BODE diagram for each frequency dependent network consists of TWO drawings: (a) Magnitude vs. frequency and (b) phase vs. frequency.
You have shown two such diagrams - however, it seems that they are not for the same circuit (because the must be correlated!).
 
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i have no idea get it from wiki.
any way how they should be correlated..
 
As I wrote already: Each frequency-dependent circuit (most simple example: RC lowpass) can be split into a magnitude and a phase function.
That is pure mathematics: H(jω)=|H(ω)|*exp(φ(ω)).
So you have two functions which are, of course, correlated because they come from the same circuit.
 
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how to learn bode plot??
 
  • #10
SDRFG said:
how to learn bode plot??
Simple answer: Learn how to produce a graphical representation of magnitude and phase of a simple frequency-dependent network (R-C combination).
Start with H(jw)=Vout/Vin and calculate magnitude and phase functions. This requires some basic math knowledge.
 
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  • #11
Start with H(jw)=Vout/Vin and calculate magnitude and phase functions. This requires some basic math knowledge.
i have got Vo/Vi=s+1/s+2
 
  • #12
SDRFG said:
i have got Vo/Vi=s+1/s+2
I suppose you mean (s+1)/(s+2), correct?
* Do you know the meaning of "s"?
* Are you able to write down the expressions for magnitude and phase?
 
  • #13
after that i dnt not no please teach me after what is s and s=jw may be zero poles
no i frget i will remijnd if you follow
 

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