[time-nuts] tutorial on phase noise and PLLs?

[Jim Lux]

I'm looking for a real short (3-4 slides or a website, really) 
description of why the phase noise of a PLL (microwave) looks the way it 
does, explaining (in sort of qualitative terms) how the phase noise 
transitions from the VCO (outside the loop bandwidth) to the reference 
(inside the loop bandwidth)..
And in particular, what the phase noise curve looks like if the loop 
bandwidth is chosen incorrectly, or if the VCO or reference has more or 
less noise than expected.

I figured before I wrote one up, if someone knows of one that's already 
out there, I could just point people to it.