[time-nuts] Have 10 MHz need 19.2 MHz

[Chris Albertson]

I'm glad I asked this question.  I was hoping to get ideas I'd never think
of.
It's going to be hard to beat that TI PLL chip especially because TI offers
free samples.

The injection idea seems almost like cheating.  I might use part of the
idea below to divide down 10MHz then inject that into the 19.2 crystal and
let the crystal itself do the rest.


On Fri, Jun 7, 2013 at 10:23 AM, Perry Sandeen <sandeenpa at yahoo.com> wrote:

> List,
>
>
> Another hardware possibility.
>
> Double the 10 MHz to 20 MHz.
>
> With another circuit of 74HC390’s divide 10 MHz to
> 200 KHz.  Then double it twice to 800 KHz
> with LM 1496 DBM’s.  Apply the two
> frequencies to a LM 1496 DBM and use a LPF to get the 19.2 MHz.
>
> Hardware complicated?  A bit.  However one doesn’t have to search for a
> microprocessor that you program
> and may not be available in a couple of years.  The IC’s are cheap and
> have been and will be around forever.
>
> IMHO sometimes an older *brute force* circuit
> proves that more can be less in implementing what you desire to accomplish.
>
> Regards,
>
> Perrier
>
>
> ________________________________
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.




-- 

Chris Albertson
Redondo Beach, California