Hi Depending on the noise floor of the phase detector (which probably is not super duper), even the noise *inside* the PLL bandwidth may not be all that great.
Bob > On Jan 8, 2018, at 2:23 PM, Bruce Griffiths <bruce.griffi...@xtra.co.nz> > wrote: > > Yes, but the PN noise (outside the PLL bandwidth) will be much higher than > with a classical multiplier. > > Bruce > >> >> On 09 January 2018 at 02:14 Chris Wilson <ch...@chriswilson.tv> wrote: >> >> Hello Bruce, Sorry, this went to you direct as well, in error. >> >> Thanks for the very fast reply! Would it be possible to use one of >> these frequency multiplier IC's? Sounds simpler, but maybe there are >> down sides? >> >> >> http://uk.farnell.com/on-semiconductor/nb3n502dg/pll-clock-multiplier-8soic/dp/2101849 >> >> on 08/01/2018 13:11 you wrote: >> >>>> >>> Divide the 10MHz by 2 and use a filter to extract the fifth >>> harmonic from the 5MHz square wave output. >>> >>> Amplify the 25MHz output from the filter if required... >>> >>> Bruce >>> >>> On 09 January 2018 at 00:31 Chris Wilson <ch...@chriswilson.tv> >>> wrote: >>> >>> 08/01/2018 11:28 >>> >>> Is there an easy way to get 25 or 27 MHz from my Trimble Thunderbolt >>> as a reference clock at 1v P to P square wave for a Si5351a >>> synthesizer chip please? I have the David Partridge divider board >>> from >>> way back that is still going strong, but 25 MHz is not an option as >>> it >>> divides only. Thanks, please keep replies to the level an idiot might >>> comprehend :) >>> >>> -- >>> Best Regards, >>> Chris Wilson. >>> mailto: ch...@chriswilson.tv >>> >>>> >> -- >> Best Regards, >> Chris Wilson. >> >> _______________________________________________ >> 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. _______________________________________________ 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.