Ken Kundert wrote on May 14th, 2014, 5:58pm:You have provided very little information to go on, so there is little help than we can give. But I would remind you that the PLL lock process can be chaotic. Very small changes can result in very different results. Is it possible that all of the results are correct?
-Ken
Oh, and do not ask simulations questions in the design boards.
Ken,
Sorry for posting questions on the wrong board.. actually it was my first post here
My problem is from transient simulation, with moderate accuracy, the PLL locks but with conservative accuracy, the PLL won't lock (see the attached figures showing the transient control voltage). If all the results are correct, my concern is what if in the real world, will the PLL work or not? I am just not sure if it is because my design is bad or something else.
I was also told that a tight accuracy may result in the converging problems and give flaky results. Will that be possible?
Many thanks for your advices!
Best,
Faye