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Design >> RF Design >> Loop filter phase margin in PLL
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Message started by pashtp on Dec 21st, 2018, 8:35am

Title: Loop filter phase margin in PLL
Post by pashtp on Dec 21st, 2018, 8:35am

What should be the phase margin of Loop filter in PLL?

Title: Re: Loop filter phase margin in PLL
Post by James_T on Jan 2nd, 2019, 8:59am

In PVT, the phase margin must be larger than 45 degrees for stability.
It's just like OPAMP phase margin.

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