Why is my Simulink circuit producing a non-sinusoidal output?

[jean28]

Hey guys. I am trying to simulate some circuits in MATLAB's Simulink, and I always get some weird graph which is not sinusoidal at all. I wanted to know if anyone could tell me which block am I missing if I want to get a good sinusoidal wave.

Here are the pictures of the circuit and the graph I get:

http://i1226.photobucket.com/albums/ee410/jean28x/simulinkpic1.jpg

http://i1226.photobucket.com/albums/ee410/jean28x/simulinkpic2.jpg

 

[jean28]

Here is a better picture of the graph:

http://i1226.photobucket.com/albums/ee410/jean28x/simulinkpic3.jpg