[time-nuts] Frequency dividers

Bruce Griffiths bruce.griffiths at xtra.co.nz
Thu Apr 2 22:35:45 UTC 2009

Rich and Marcia Putz wrote:
> Hi All;
> All this frequency divider conjecture makes me think someone ought to come up with a modern design regenerative divider! 
> Perhaps a double balanced mixer and a couple of high speed OP amps!
> Regards; Rich
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Wide band opamps are far too noisy for such state of the art
applications particularly in the flicker noise region.
A well designed discrete component RF amplifier with negative RF
feedback will have much lower phase noise.
Some MMICs can have phase noise that is almost as low as a discrete
component amplifier.
Schottky diode based double balanced mixers have lower phase noise than
active double balanced mixers.


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