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Altera_Forum
Honored Contributor
Honored ContributorPLL usage
Hello all, I've noticed that many use PLL on the reference clock input even if they do not need to divide/multiply/shift this clock or do not have external clock to synchronize to the reference fr...
Altera_ForumHonored Contributor
Honored ContributorInteresting. I thought PLLs are sensitive to jitter.
Means that typical PLL is only as good as the reference clock that is supplied to it, because the phase detector seeks to continually adjust the VCO to match the incoming reference. Maybe loop filter with a long time constant can be used to reduce jitter.... And what will be if the PLL has a noisy analog power supply? Thanks
