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hmc439 loop filter design

Question asked by arvabj on Dec 25, 2014
Latest reply on Apr 29, 2015 by MarcC

I am interested in using the HMC439 Phase-Frequency Detector (PFD) for a PLL application. Our application needs different VCO and narrower loop filter than the one shown in the datasheet (page-7, application circuit). I am not able to find a PLL design tool that will help me plug-in PFD gain/ offset, VCO parameters or loop-bandwidth requirements to calculate RC component values for the loop filter. I downloaded one PLL design tool from Hittite but it does not have a HMC439 PFD model.

 

I would appreciate any help in designing custom PFD + Loop filter using HMC439 + THS4031 with any off-the-shelf VCO modules.

 

Thanks,

AB

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