# Can't do simple RC circuit

1. Apr 4, 2009

### Rib5

1. The problem statement, all variables and given/known data

I think I am turning retarded. For some reason I can't get the right values for a simple voltage division in the s-domain. Find Vout in terms of Vin
http://img11.imageshack.us/img11/6325/tardf.jpg [Broken]

2. Relevant equations

3. The attempt at a solution

So I do H(s) = (1/s) / ((1/s) + 1 ) = 1/(s+1)
Then Inverse Laplace transform it and get Vin*e^(-t). But shouldn't Vout=Vin(1-e^(-t)) ?

So I think I am ending up with the voltage drop across the resistor instead of the capacitor like it should be...

Last edited by a moderator: May 4, 2017
2. Apr 5, 2009

### Kruum

Can you post the whole problem? I'm quite sure you have left something important out. One error I can see right now is, you haven't laplace transformed the pulse signal.

3. Apr 5, 2009

### Rib5

Thanks so much! That's what I was forgetting.

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