i am in awe of this PLL. absolute unit. just look at the jitter (please don't hit me i'll find a termination resistor somewhere i promise)pic.twitter.com/f3FLpPdDkH
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If your input clock is messy then it isn't uncommon for a PLL (especially with default settings) to either not lock at all, or (worse) to sometimes lose lock. Some phase detectors are worse in this regard than others. Solution is usually the same: Tune filter parameters.
But I'm sure you know all that. Tbh I'm just on twitter right now because I'm avoid some work, and tweeting about PLLs seems to work just fine for that purpose. :)
