[time-nuts] NIST frequency doubler
Dr Bruce Griffiths
bruce.griffiths at xtra.co.nz
Sat Jul 7 23:09:49 EDT 2007
Mike Feher wrote:
> Interesting. Diode doublers of this configuration have been around for about
> 40 years, and of course so have their FET counterparts. While I never did an
> investigation on any additive residual noise, since typically the 6 dB was
> enough to mask it, how is this better than the plain jane full wave diode
> doubler? 73 - Mike
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell, NJ, 07731
It has lower phase noise especially at lower frequency offsets.
About 10-12dB lower (@75Hz offset, 10MHz input) than a typical frequency
multiplier according to NIST.
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