# Series and Parallel RLC parameters

1. May 21, 2017

### baby_1

1. The problem statement, all variables and given/known data
I want to find different parameters of series and parallel RLC
for series RLC we have this transfer function

and we know that transfer function of second order system is something like this:we can assume H0=1

but is wrong(when you use only denominator you find out that ).However the same approach works fine for parallel RLC.

what is my mistake?

2. Relevant equations

3. The attempt at a solution

2. May 21, 2017

### Staff: Mentor

For a series RLC, from the denominator I find $Q=\omega_o\frac L R$

What is your transfer function for the series circuit?

3. May 21, 2017

### baby_1

Hi,
Sorry , I mean that this approach works for Series RLC but not works for parallel RLC
Here is my calculation

we know that

So in deliminator , but with numerator it is different

The same approach