Bode Plots & High Pass, Low Pass, Band Stop and Pass Frequencies

Discussion in 'Homework Help' started by libnitz, Feb 20, 2016.

1. libnitz Thread Starter New Member

Jan 29, 2016
17
0
Hi,

I just need some confirmation on 3 questions

1. I was asked to calculate the poles and zeros. I believe

zeros: none
poles: 2 (or p1,2) = -1

2. I was also asked to calculate the slope of the magnitude response was w -> 0
Here is my sketched graph

From my pic, it shows that as w -> 0, H(s) -> 0.

3. What type of filter response does this network exhibit.
I believe it will be a Low Pass because as

s->0, H(s) -> 1 and as s-> infinity, H(s) -> 0?

Does this reasoning make it a low pass filter, high pass, band stop or band pass?

Any help is appreciated

2. shteii01 AAC Fanatic!

Feb 19, 2010
3,708
556
3.
Yes.
As w increases, s=jw will also increase. s is in the denominator so as s increases, the denominator also increases, so as s becomes bigger, $\frac{1}{s^2}$ will become smaller and smaller and smaller. So near 0 rad/s (or Hz) you will have some useful response, but as you move further away (toward infinity), the response will sharply drop.

libnitz likes this.
3. libnitz Thread Starter New Member

Jan 29, 2016
17
0
Thanks! I used the same reasoning as you wrote, however I was not too sure I got it right.

Could you also double check my calculations on this problem also?

MOD NOTE: You already have an active thread on this other problem.