To Bob kb8tq. You wrote: > Hi > The noise floor of the double balanced mixer (used as a phase > detector at 100 MHz) is in the -165 go -170 dbc / Hz range. I've > used the parts you are talking about. Their floor is *way* higher. > Bob I stated the MC100EP140 would not match the Hittite HMC984LP4E. It has -231 dBc/Hz noise. -231 dBc is *way* lower than -170 dbc. About 60 dB lower. You might be interested in trying it. Only $13.25 at Arrow: https://octopart.com/search?q=HMC984LP4E Thanks, Mike

Hi As noted in another post, the phase detector guys talk about a figure of merit that is not directly comparable to the floor of a DBM. If I translate the -170 dbc/ Hz at 100MHz on the DBM, to the PLL chip FOM, I would add 80 db. That would make it a -250 dbc FOM vs the -231. Since the FOM stuff does not really apply to a DBM approach, you would never see this done. One works one way, the other works in a very different fashion. Bob > On Jul 8, 2022, at 8:19 PM, Mike Monett via time-nuts <time-nuts@lists.febo.com> wrote: > > To Bob kb8tq. You wrote: > >> Hi > >> The noise floor of the double balanced mixer (used as a phase >> detector at 100 MHz) is in the -165 go -170 dbc / Hz range. I've >> used the parts you are talking about. Their floor is *way* higher. > >> Bob > > I stated the MC100EP140 would not match the Hittite HMC984LP4E. It has > -231 dBc/Hz noise. > > -231 dBc is *way* lower than -170 dbc. About 60 dB lower. > > You might be interested in trying it. Only $13.25 at Arrow: > > https://octopart.com/search?q=HMC984LP4E > > Thanks, > > Mike > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

I checked the Hittite/AD part at Mouser, $21 and change. Problem is, they have a few, but it is marked obsolete/discontinued. Also, a devilish package to work with. . . On 2022-07-08 22:19, Mike Monett via time-nuts wrote: > To Bob kb8tq. You wrote: > >> Hi > >> The noise floor of the double balanced mixer (used as a phase >> detector at 100 MHz) is in the -165 go -170 dbc / Hz range. I've >> used the parts you are talking about. Their floor is *way* higher. > >> Bob > > I stated the MC100EP140 would not match the Hittite HMC984LP4E. It has > -231 dBc/Hz noise. > > -231 dBc is *way* lower than -170 dbc. About 60 dB lower. > > You might be interested in trying it. Only $13.25 at Arrow: > > https://octopart.com/search?q=HMC984LP4E > > Thanks, > > Mike > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com ------------ When in trouble, when in doubt, Run in circles, scream and shout. (Naval War College Football Team) ---------------------- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304

On Sonntag, 10. Juli 2022 01:24:49 CEST djl via time-nuts wrote: > I checked the Hittite/AD part at Mouser, $21 and change. Problem is, > they have a few, but it is marked obsolete/discontinued. Also, a > devilish package to work with. . . For a one-off project, lifetime doesn't really matter, does it? The package is QFN, even with center pad. That is inconvenient, but not too bad. It's just kind of small, 4mm edge length. You'd certainly need a microscope and hot air to solder it or a quite fine soldering tip if you would want to deadbug it. Were I to use it, and wanted to breadboard a prototype, I'd certainly make a suitable breakout board for easier handling. > On 2022-07-08 22:19, Mike Monett via time-nuts wrote: > > To Bob kb8tq. You wrote: > >> Hi > >> > >> The noise floor of the double balanced mixer (used as a phase > >> detector at 100 MHz) is in the -165 go -170 dbc / Hz range. I've > >> used the parts you are talking about. Their floor is *way* higher. > >> > >> Bob > > > > I stated the MC100EP140 would not match the Hittite HMC984LP4E. It has > > -231 dBc/Hz noise. > > > > -231 dBc is *way* lower than -170 dbc. About 60 dB lower. > > > > You might be interested in trying it. Only $13.25 at Arrow: > > > > https://octopart.com/search?q=HMC984LP4E > > > > Thanks, > > > > Mike > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe send an email to time-nuts-leave@lists.febo.com > > ------------ > When in trouble, when in doubt, > Run in circles, scream and shout. > (Naval War College Football Team) > ---------------------- > Dr. Don Latham AJ7LL > PO Box 404, Frenchtown, MT, 59834 > VOX: 406-626-4304 > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com