how to caculate the filter's parameters

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Amy Wu

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Hi All,
i want to design a PLL,now i have met with some problems.i'd like to use an active filter,but don't know how to caculate the filter's parameters.can u help me?thanks a lot!
 

check National application note AN1001, you will find in it the equations by which you can design the loop filter.
 

please refer to the following book by national semi employee banerjee i believe.
It has good explanation


"PLL Performance, Simulation & design"

thanks
 

thank u for ur help.i have read the book u have recommended.i want to use a 3 order active filter with an opamp.the PLL BW is 100KHz,but i found it very hard to design a loop filter on chip.can u give me some more advices?
 

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