[time-nuts] 10 MHz -> 16 MHz

Luca iw2lje at gmail.com
Sun Sep 30 03:01:44 EDT 2018


Simple 100 kHz ref frequency PLL  (like old cmos series) with 16 MHz VCXO (
very simple 16MHz xtal with varicap arrangement).
All parts in the ordinary spare generic stuff drawer......



Il domenica 30 settembre 2018, Bruce Griffiths <bruce.griffiths at xtra.co.nz>
ha scritto:

> Full wave rectify the sinewave input, extract the 8th Harmonic with a
> passive filter.
> Drive the input of a divide by 5 circuit via a suitable impedance
> converter network.
> Could even use a CMOS 74XX74 flipflop plus a few passive components as the
> divider.
>
> Bruce
>
> > On 30 September 2018 at 16:57 Tom Van Baak <tvb at LeapSecond.com> wrote:
> >
> >
> > What's a clever, simple, reliable (pick 2 of 3) way to get 16 MHz out of
> 10 MHz? Low phase noise isn't a big requirement and jitter doesn't need to
> be sub-nanosecond. The main requirement is perfect cycle count accuracy.
> This is for driving a 16 MHz microcontroller from a 10 MHz Rb/Cs/GPSDO. 10
> MHz input is likely sine; 16 MHz output is 3v3 or 5v CMOS.
> >
> > Thanks,
> > /tvb
> >
> >
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