rajasekhar
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Posts: 7
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Hi, This is typical 2nd harmonic leakage in any differential circuit, even in a perfectly balanced differential pair also you would see 2nd harmonic at tail node. So this is not new problem. Coming to PLL how does 5Ghz ripple bothers you, if not mistaken the highest Bandwidth I have seen around 200MhZ (in case of reference less CDR ). You may see very less AM-PM conversion in case of you have wide tuning range or highly non linear varactor.
Thanks, Raj.
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