Equation that relates the settling time of charge pump PLL to the frequency tolerance

[husseinadel]

AA
can anybody tell me an equation that relates the settling time of charge pump PLL
to the frequency tolerance reqired,,specially for type 2 ,3rd and 4th order PLL
thanks

 

[vfone]

Re: PLL design question

**broken link removed**

 

[husseinadel]

Re: PLL design question

h**p://www.national.com/an/AN/AN-1001.pdf

thanks for concern ,but i want a general expression if present

 

[eda_freak]

Re: PLL design question

Hi Friend,
Refer the book by BEST on phase locked loops or the one by by woolaver...both available for downloads from this forum...else contact me...

 

[biff44]

Re: PLL design question

Yes, and I would like a simple equation to predict what the stock market is going to do next week!

No such thing. PLL settling time is a non-linear event, and good estimates involve probablilities and tragectories. A wild guess relates settling time to control loop bandwidth, but you can be off by orders of magnitude with that guess.