# Bode plot application

Hello,
After long time i am able to find Laplace transform function but cant 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?

anorlunda
Staff Emeritus
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.

• SDRFG
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. Should both diagrams be correlated?

• SDRFG
no because one show for phase and another show for magnitude.

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!).

• SDRFG
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.

• SDRFG
how to learn bode plot??

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.

• SDRFG
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

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?

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