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

Charles Steinmetz csteinmetz at yandex.com
Sat Jul 9 17:57:57 EDT 2016

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:


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:


Best regards,


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