# RLC Transfer Function

1. Jan 8, 2008

### dashkin111

1. The problem statement, all variables and given/known data
We have a series RLC circuit with x(t) as the voltage source. We are to find the frequency response function H(w) from the input x(t) to the output y(t)=Vc(t) - ie the voltage across the capacitor.

2. Relevant equations

3. The attempt at a solution

$$H(\omega) = \frac{1}{1+j \omega R C - \omega ^{2} L C }$$

I just got it from doing the impedance of the capacitor over the total impedance. First does this look correct?

My second question arises in a more "general" approach of going at transfer function problems. Do I always just do the impedance part we are looking at divided by the impedance of the whole circuit?

2. Jan 9, 2008

### mjsd

yes.

not entirely sure what you mean by "general" approach; but it usually depends on the circuit