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Dear antia66,
y( Q" [8 \% X" q& q0 X* vIf damping factor is choosen 2, how about the natural freqency?8 }1 r9 G& v8 k; u' e
Will the natural freqency changed with damping factor ?
* r8 R* }" O5 O4 }2 gAs my understanding, choose bandwidth <= 1/10*reference freq is for linear model is valid or not, that is, if need widther bandwidth PLL, the parameter from continuous model cannot provide expected PLL behavior.% [1 F8 q7 _1 _
However, VCO related noise causes the bandwidth cannot choosed to too high bandwidth.
; n# v% G9 {4 v$ w4 G. {So, linear model is usually useful. |
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發表於 2010-1-20 15:40:27
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