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Phase Noise and Jitter Measurements
› divide by 2, then multi by 2, affect phase noise?
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divide by 2, then multi by 2, affect phase noise? (Read 3070 times)
apple_fandai
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Posts: 1
divide by 2, then multi by 2, affect phase noise?
Mar 25
th
, 2004, 8:02am
Hi,
I design a PLL. If I add a divid by 2 and a multiply by 2 circuit at the output of VCO, the frequency relationship of PLL don't change. Is it harmful to phase noise of PLL? How these two circuits will affect the phase noise of whole PLL?
Thanks! :)
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Andrew Beckett
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Posts: 1742
Bracknell, UK
Re: divide by 2, then multi by 2, affect phase noi
Reply #1 -
Mar 28
th
, 2004, 11:23am
Well, unless the divider and multiplier are noiseless,
I'd have thought that was obvious?
Andrew.
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