Mehdi Abderezai
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Posts: 3
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Hi, I have a question about the noise extraction of a charge pump + PFD. The published tutorial states to extract the current noise of CP when applied an offset phase to the PFD, and then convert noise current back into time Jitter by multiplying by Period/Kdet
For example, the noise is 10nA, the Period is 10ns, And the Charge Pump Delivers 50uA when turned on. That makes jitter = (10ns * 10nA)/50uA = 2ps?
And if so, this implies that if I double the period, the jitter will double, which does not make sense to me.
Thanks.
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