Have to say a search for PLL book by Best generates lots of stuff. None of it about PLLs. Better hint please? I think Lyons may be a bit better. Regards Paul WB8TSL
On Tue, Mar 21, 2017 at 7:39 AM, Attila Kinali <att...@kinali.ch> wrote: > On Mon, 20 Mar 2017 21:32:28 -0700 > James Peroulas <ja...@peroulas.com> wrote: > > > I'm trying to understand how to design and analyze the loop filters in a > > digital PLL. Specifically, because of digital processing delays, the > phase > > offset measured at time t will only produce a change on the VCXO input at > > time t+T, where T is the sampling period of the digital loop. > > You have the same delays in analog filters as well. As a rule of thumb > you can assume that the delays are in the same order of magnitude as > with the equivalent analog filters, not accounting for the delays due to > pre- and post-processing of the signal. > > The analysis of digital PLLs works the same as with analog ones, you > just exchange the Laplace transform with the Z-transform. You can add > arbitrary delays due to pre/post-processing as a simple multiplication > by 1/z for each clock cycle of delay. > > > I've found plenty of texts describing analog loop filters. Are there any > > recommendations for digital loop filter PLL design? > > The PLL book by Best contains two chapters on how to design digital PLLs. > I can also recommend "Understanding digital signal processing" by Lyons, > which is a very hands-on description how to do filters and perform other > signal processing tasks. > > > Attila Kinali > > -- > It is upon moral qualities that a society is ultimately founded. All > the prosperity and technological sophistication in the world is of no > use without that foundation. > -- Miss Matheson, The Diamond Age, Neil Stephenson > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.