[time-nuts] have 10MHz need 19.5Mhz

[Chris Albertson]

Looks like the CDCE913 is the simplest one chip solution.  The frequency in
the subject line is in error.  What is needed is 19.2MHz.

So inside the CDCE913 we divide by 25 then multiply by 23.   Or said
differenty 9.2MHz = (23/25) 10MHz.
The CDCE193 is a 14 pin chip that will do the above.  It has non volatile
EPROM so you can program 23/25 ratio into it once and you don't need a uP
in the final circuit.   But you do need a 1.8 volt power supply.

This chip appears to be generally useful.  It can synthesize just about
anything and phase lock it from a 10MHz reference.

The price is right, TI offer samples.



On Sun, Jun 2, 2013 at 11:59 AM, Chris Albertson
<albertson.chris at gmail.com>wrote:

>
> Recent talk about NTP servers.  It seems the limit to their accuracy is
> the quality of the crystal that drives the CPU clock.  Most of them make
> really good thermometers.  I'd like to try and replace the crystal on a
> Raspberry Pi with a signal derived from a time nut quality 10MHz standard.
> --
>
> Chris Albertson
> Redondo Beach, California
>



-- 

Chris Albertson
Redondo Beach, California