[time-nuts] Does doubling a frequency alter the original ADEV of the frequency?

[davidh]

Charles,

Thanks for the reminder about this... it will neatly solve a problem I 
have at hand. Can you advise which core you used for the transformer?

Thanks,

david


On 10/07/2016 07:57, Charles Steinmetz wrote:
> James wrote:
>
>> Is there a preferred frequency doubler circuit which would do the
>> least harm to the ADEV of the oscillator?  The signal can be a square
>> wave and does not need to be a sine wave.  Thanks.  Jim Robbins
>
> A quadrature-fed DBM produces the lowest jitter and noise.  My
> implementation can be found at:
>
> <http://www.ko4bb.com/getsimple/index.php?id=download&file=02_GPS_Timing/4_App_Notes_and_Articles/Frequency_doubler_quadrature_DBM.pdf>
>
>
> A well-designed push-push frequency doubler is probably second (but note
> that many push-push designs you find on the web have various common
> design flaws).  My implementation can be found at:
>
> <http://www.ko4bb.com/getsimple/index.php?id=download&file=02_GPS_Timing/Frequency_doubler_push_push_JFET_schematic_description_discussion.pdf>
>
>
> Best regards,
>
> Charles
>
>