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Design >> Mixed-Signal Design >> Bets way to check if PLL locked?
https://designers-guide.org/forum/YaBB.pl?num=1398907295

Message started by bigball on Apr 30^th, 2014, 6:21pm

Title: Bets way to check if PLL locked?
Post by bigball on Apr 30^th, 2014, 6:21pm

Hi:

I have heard many different ways to check if PLL loop locked. One of my friends claimed that checking if TIE of the vco output clk settles is the only correct way. Any comment?

Thanks,
Bigball

Title: Re: Bets way to check if PLL locked?
Post by loose-electron on May 16^th, 2014, 1:51pm

when the control voltage is flat and the phase frequency detector is in phase mode

how you deal with that is up to you.