# Homework Help: Asymptotic magnitude Bode plot for a network function

Tags:
1. Apr 19, 2017

### Cocoleia

1. The problem statement, all variables and given/known data
I am working on the following problem:

3. The attempt at a solution
I have the solutions, I just don't understand:

I know that the pole should be the root of the denominator? but in all the examples I was given they used s and not jw, so what is the variable in the network function ? I am capable of deriving the network function, just a bit unsure of what the best method for finding the poles is.
I also have an example in the book where they say:

I've been trying to follow this logic. If we look at where ω<p1, I can see that they approximated both terms of the denominator by 1 and somehow got rid of the negative sign. For p1<ω<p2, it looks like they approximated the whole denominator by just jωC1R1...
I don't understand how or why they did what they did in the solutions. Thanks.

2. Apr 24, 2017

### PF_Help_Bot

Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.