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發表於 2010-1-20 15:40:27
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Dear antia66,
& z9 g/ F8 X- {If damping factor is choosen 2, how about the natural freqency?# W" {- {1 f, U# r8 x* k& g
Will the natural freqency changed with damping factor ?
" V4 F" K! e. S8 G% T0 c. A/ SAs 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.
* }- h2 s j; a. {However, VCO related noise causes the bandwidth cannot choosed to too high bandwidth.- ]9 K' I3 Z. e6 }. V2 d5 v7 o
So, linear model is usually useful. |
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