What's the simplest way to generate 16 MHz from 10 MHz? This will be for clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low price and low parts count is a goal; jitter is not a concern but absolute long-term phase coherence is a must. The ICS525 (as in TAPR Clock-Block) is a good candidate but I was wondering if there's something cheaper, less functional, and maybe not SSOP. Any suggestions? Thanks, /tvb

Tom. OK the challenge simple. CD4046 16 MHz vco and div by 8 using a 2 Mhz ref. Thats pretty easy as they say. As an alternative and very easy 10 MHz div 2 2MHz X 4 X 2. This requires BPF but pretty easy also. Lastly an injection osc. 10 Mhz div to 2 Mhz differentiate and feed to a 16 Mhz osc. Thats actually the easiest of the approaches. Regards Paul On Wed, Jan 2, 2013 at 1:54 PM, Tom Van Baak <tvb@leapsecond.com> wrote: > What's the simplest way to generate 16 MHz from 10 MHz? This will be for > clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low price > and low parts count is a goal; jitter is not a concern but absolute > long-term phase coherence is a must. > > The ICS525 (as in TAPR Clock-Block) is a good candidate but I was > wondering if there's something cheaper, less functional, and maybe not > SSOP. Any suggestions? > > Thanks, > /tvb > > > _______________________________________________ > 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. >

Since injection locking is possible when the ratio of the 2 frequencies involved is a rational number, a 16 MHz oscillator can be directly injection locked to a 10MHz signal without the need for dividers etc. Bruce paul swed wrote: > Tom. > OK the challenge simple. CD4046 16 MHz vco and div by 8 using a 2 Mhz ref. > Thats pretty easy as they say. > As an alternative and very easy 10 MHz div 2 2MHz X 4 X 2. This requires > BPF but pretty easy also. > Lastly an injection osc. 10 Mhz div to 2 Mhz differentiate and feed to a 16 > Mhz osc. > Thats actually the easiest of the approaches. > Regards > Paul > > > On Wed, Jan 2, 2013 at 1:54 PM, Tom Van Baak<tvb@leapsecond.com> wrote: > > >> What's the simplest way to generate 16 MHz from 10 MHz? This will be for >> clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low price >> and low parts count is a goal; jitter is not a concern but absolute >> long-term phase coherence is a must. >> >> The ICS525 (as in TAPR Clock-Block) is a good candidate but I was >> wondering if there's something cheaper, less functional, and maybe not >> SSOP. Any suggestions? >> >> Thanks, >> /tvb >> >> >> _______________________________________________ >> 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. > >

Bruce is right about that fact. Thanks. Square up the 10 Mhz. Diff the leading edge (It actually doesn't matter) maybe 2-5pf cap and 300 ohm R to ground. Feed this into a transistor that is in the bottom end of a one transistor oscillator. There are actually several ways to inject. Think of a totem pole of 2 transistors. Use google and do a search and you will see what I am talking about. There were some articles that the spread spectrum hams used that describe it. On Wed, Jan 2, 2013 at 2:48 PM, Bruce Griffiths <bruce.griffiths@xtra.co.nz>wrote: > Since injection locking is possible when the ratio of the 2 frequencies > involved is a rational number, a 16 MHz oscillator can be directly > injection locked to a 10MHz signal without the need for dividers etc. > > Bruce > > > paul swed wrote: > >> Tom. >> OK the challenge simple. CD4046 16 MHz vco and div by 8 using a 2 Mhz ref. >> Thats pretty easy as they say. >> As an alternative and very easy 10 MHz div 2 2MHz X 4 X 2. This requires >> BPF but pretty easy also. >> Lastly an injection osc. 10 Mhz div to 2 Mhz differentiate and feed to a >> 16 >> Mhz osc. >> Thats actually the easiest of the approaches. >> Regards >> Paul >> >> >> On Wed, Jan 2, 2013 at 1:54 PM, Tom Van Baak<tvb@leapsecond.com> wrote: >> >> >> >>> What's the simplest way to generate 16 MHz from 10 MHz? This will be for >>> clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low >>> price >>> and low parts count is a goal; jitter is not a concern but absolute >>> long-term phase coherence is a must. >>> >>> The ICS525 (as in TAPR Clock-Block) is a good candidate but I was >>> wondering if there's something cheaper, less functional, and maybe not >>> SSOP. Any suggestions? >>> >>> Thanks, >>> /tvb >>> >>> >>> ______________________________**_________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/**mailman/listinfo/time-nuts<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<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<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. >

Hi I think I'd second the thought of join with an ARM or something like it that will be happy with 10 MHz in. Next choice would be a PIC24 / dsPIC33 that's also happy with 10 MHz in. The money you will pay for the clock conversion chip(s) will go a long way spent on a CPU. Bob On Jan 2, 2013, at 1:54 PM, Tom Van Baak <tvb@LeapSecond.com> wrote: > What's the simplest way to generate 16 MHz from 10 MHz? This will be for clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low price and low parts count is a goal; jitter is not a concern but absolute long-term phase coherence is a must. > > The ICS525 (as in TAPR Clock-Block) is a good candidate but I was wondering if there's something cheaper, less functional, and maybe not SSOP. Any suggestions? > > Thanks, > /tvb > > > _______________________________________________ > 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.

Am 02.01.2013 19:54, schrieb Tom Van Baak: > What's the simplest way to generate 16 MHz from 10 MHz? This will be for clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low price and low parts count is a goal; jitter is not a concern but absolute long-term phase coherence is a must. > Probably not the simplest way, but straightforward & maybe you can recycle parts of it: http://www.hoffmann-hochfrequenz.de/downloads/vnwa_sync_1.1.pdf http://www.hoffmann-hochfrequenz.de/downloads/vnwa_sync_1.1_layout.png That's how I did (optional) 10 MHz ---> 32 MHz for my DG8SAQ VNWA. parts are cheap & available @ digikey. regards, Gerhard

I looked at the TI chip that really seems simple. On Wed, Jan 2, 2013 at 3:58 PM, Gerhard Hoffmann <dk4xp@arcor.de> wrote: > Am 02.01.2013 19:54, schrieb Tom Van Baak: > >> What's the simplest way to generate 16 MHz from 10 MHz? This will be for >> clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low price >> and low parts count is a goal; jitter is not a concern but absolute >> long-term phase coherence is a must. >> >> > Probably not the simplest way, but straightforward & maybe you can recycle > parts of it: > > > http://www.hoffmann-**hochfrequenz.de/downloads/**vnwa_sync_1.1.pdf<http://www.hoffmann-hochfrequenz.de/downloads/vnwa_sync_1.1.pdf> > > http://www.hoffmann-**hochfrequenz.de/downloads/**vnwa_sync_1.1_layout.png<http://www.hoffmann-hochfrequenz.de/downloads/vnwa_sync_1.1_layout.png> > > > That's how I did (optional) 10 MHz ---> 32 MHz for my DG8SAQ VNWA. > parts are cheap & available @ digikey. > > > regards, Gerhard > > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. >

The optimum width of the injection pulse is equal to 1/2 the period of the output frequency of the injection locked oscillator. In this case a pulse width of around 31.25ns Bruce paul swed wrote: > Bruce is right about that fact. Thanks. > Square up the 10 Mhz. Diff the leading edge (It actually doesn't matter) > maybe 2-5pf cap and 300 ohm R to ground. Feed this into a transistor that > is in the bottom end of a one transistor oscillator. There are actually > several ways to inject. Think of a totem pole of 2 transistors. > Use google and do a search and you will see what I am talking about. There > were some articles that the spread spectrum hams used that describe it. > > On Wed, Jan 2, 2013 at 2:48 PM, Bruce Griffiths > <bruce.griffiths@xtra.co.nz>wrote: > > >> Since injection locking is possible when the ratio of the 2 frequencies >> involved is a rational number, a 16 MHz oscillator can be directly >> injection locked to a 10MHz signal without the need for dividers etc. >> >> Bruce >> >> >> paul swed wrote: >> >> >>> Tom. >>> OK the challenge simple. CD4046 16 MHz vco and div by 8 using a 2 Mhz ref. >>> Thats pretty easy as they say. >>> As an alternative and very easy 10 MHz div 2 2MHz X 4 X 2. This requires >>> BPF but pretty easy also. >>> Lastly an injection osc. 10 Mhz div to 2 Mhz differentiate and feed to a >>> 16 >>> Mhz osc. >>> Thats actually the easiest of the approaches. >>> Regards >>> Paul >>> >>> >>> On Wed, Jan 2, 2013 at 1:54 PM, Tom Van Baak<tvb@leapsecond.com> wrote: >>> >>> >>> >>> >>>> What's the simplest way to generate 16 MHz from 10 MHz? This will be for >>>> clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low >>>> price >>>> and low parts count is a goal; jitter is not a concern but absolute >>>> long-term phase coherence is a must. >>>> >>>> The ICS525 (as in TAPR Clock-Block) is a good candidate but I was >>>> wondering if there's something cheaper, less functional, and maybe not >>>> SSOP. Any suggestions? >>>> >>>> Thanks, >>>> /tvb >>>> >>>> >>>> ______________________________**_________________ >>>> time-nuts mailing list -- time-nuts@febo.com >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/**mailman/listinfo/time-nuts<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<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<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. > >

Tom, This may not be the answer you are looking for, but the simplest way may be to use a uC that has a PLL for clock generation. Didier On Wed, Jan 2, 2013 at 12:54 PM, Tom Van Baak <tvb@leapsecond.com> wrote: > What's the simplest way to generate 16 MHz from 10 MHz? This will be for > clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low price > and low parts count is a goal; jitter is not a concern but absolute > long-term phase coherence is a must. > > The ICS525 (as in TAPR Clock-Block) is a good candidate but I was > wondering if there's something cheaper, less functional, and maybe not > SSOP. Any suggestions? > > Thanks, > /tvb > > > _______________________________________________ > 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. >

How about simply using a 16MHz GPSDO? We have shipped FireFly-1A units with 16MHz Ocxo.. Those can also generate 16MHz out of a 1PPS reference. Bye, Said Sent From iPhone On Jan 2, 2013, at 12:58, Gerhard Hoffmann <dk4xp@arcor.de> wrote: > Am 02.01.2013 19:54, schrieb Tom Van Baak: >> What's the simplest way to generate 16 MHz from 10 MHz? This will be for clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low price and low parts count is a goal; jitter is not a concern but absolute long-term phase coherence is a must. >> > > Probably not the simplest way, but straightforward & maybe you can recycle parts of it: > > > http://www.hoffmann-hochfrequenz.de/downloads/vnwa_sync_1.1.pdf > > http://www.hoffmann-hochfrequenz.de/downloads/vnwa_sync_1.1_layout.png > > > That's how I did (optional) 10 MHz ---> 32 MHz for my DG8SAQ VNWA. > parts are cheap & available @ digikey. > > > regards, Gerhard > > _______________________________________________ > 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.