There are many Loop filter configurations in ADIsim PLL tools.Which one is best choice for low frequency offset phase noise.
Please work through the ADISimPLL tutorial and attempt this yourself first. If you still have trouble, post your *.pll file or specific questions and we can try to assist you.
Perhaps a simple one. If the frequency offset is less than the loop bandwidth, choosing a filter with additional poles probably won't help you. The low frequency offset noise is generally dominated by the reference, dividers and phase detector. Avoiding active components like opamps may help. Keep resistor values low to minimise thermal noise. There will be a limit to how low you can go depending on the desired loop gain and available charge pump current.
Thanks for feedback.
I want to design a PLL+VCO+Prescaler that working on 19Ghz.VCO Output.
Can you please help to generate a ADIsimPLL simulation file (Version 5.00.03) with following parts ?
PLL :HMC704 ,
Loop filter configuration : using HMC 704 EVB.
VCXO 100MHz Reference:-90dBC/Hz@10Hz,:-123dBC/Hz@100Hz,,:-145dBC/Hz@1kHz,:-160dBC/Hz@10kHz,:-170dBC/Hz@100kHz
Thank you very much.
Attached is my *.pll file for your review..
I do not have VCO:HMC733 and Prescaler:HMC447 library in my *.pll file .
Can you please add this two library(HMC733 and HMC447) into my *.pll file then send to me?
100MHz already build in table.
Bye the way,The VCO frequency out is 14.0-19.5GHz in my project .
Thanks for helps.
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