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about PLL loop bandwidth

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JellyWalker

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When mentioned that "loop bandwidth should exceed 10% of reference frequency", here does "loop bandwidth" stand for the bandwidth of OPEN Loop transfer function or Closed loop transfer function....or just the loop filter bandwidth? In case it is one of them, then is it 3-db bandwidth or unity gain bandwidth? thanks
 

Hi,
Closed loop transfer function bandwidth
Rania
 

agee with rania

it is the closed loop bandwidth

khouly
 

the difference between open loop and close loop should be small
 

Hello,

I think closed loop transfer function and 3dB corner are right for your question.
 

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