Tom
For simple, cheap, low performance and fast to build with junk box parts,
hard to beat:
What I made long ago for myself (before time-nut days).
I still use it today for low end stuff, and it is all done with standard
74HC DIP parts.
The main IC is a 74HCT4046 Phase lock loop with internal Osc.
The internal osc output is divided by 16 using a 74HC93. The 10MHz ref is
divide by 10 using a 74HC90
The two 1 MHz signals are feed into it's phase comparator. A couple of
resistors and caps and I have a low tech 16 / 8 / 4 / 2 / 1 MHz tracking
ref.
With a couple of tweaks, I got the noise jitter down to a couple of ns as
measured with a scope.
16 MHz is pushing the limits of the internal Osc, but I did not have any
trouble getting there using less than the recommended osc cap.
ws
********************
"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.
