[time-nuts] Ultra Low Phase Noise 5 to 10 MHz Frequency Doubler

Rick Karlquist richard at karlquist.com
Tue Feb 5 16:29:16 EST 2013


This circuit was already in extensive use 40 years ago at Zeta
Laboratories, where I used to work.  It's an OK circuit but
I don't see what advantage it has over a full wave bridge doubler.
The performance of this circuit is dependent on the source impedance
of whatever is driving it, and the drive level, and the tuning
of the output filter.  In most cases, you should provide an
input filter as well.

Rick Karlquist N6RK


Adrian wrote:
> Hello,
>
> I'm forwarding the message below on behalf of Luciano, because there
> appears to be a problem with the time-nusts list that does no longer
> transmit any of his messages.
>
> Adrian
>
> +++++++++++++++++++++
>
> Hi all,
>
> A new paper, an Ultra Low Phase Noise 5 to 10 MHz Frequency Doubler , is
> published in Timeok site.
> This project is born from three time-nuts user.
>
> The link is:
> http://www.timeok.it/files/high_performance_frequency_doublerv12.pdf
>
> Regards,
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