How to find the Phase Noise for the DIVIDER

Dear all,

I want to  simulate the phase noise of my divider which take input differential clock source (ideal).

Can any body tell how can I do the phase noise simulation. ( please point to any suitable documents)

 I want to do following simulations with the divider

1)  simulate without any phase noise  in the  clock

2) simulate with certain amount phase noise  in the  clock

3) Lastly, I want to make some trasnsistors of the divider NOISELESS and then do the phase noise simulation

I could make the flicker noise of desired MOS transistors zero but How can I make thier thermal NOISe zero.