northfish
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A question confused me for quite a while: In a generic RF PLL with phase detector, Loop filter, VCO and loop divider /N, if the division ratio N is scaled down to N/2, the reference frequency is 2xfref, while ALL OTHER components are kept the same, how will the PLL output spectrum change? Close-in phase noise floor? Far-out phase noise?
Please comment on it.
thanks!
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