[time-nuts] 10Mhz Sine from Square Wave Synthesizer

Luciano Paramithiotti timeok.it at gmail.com
Mon May 20 12:03:36 EDT 2013

Hi Andy,

The simplest way is to use a low pass filter with a notch capability for
the second and third harmonics.
You can find the schematic and response for 5 and 10 MHz here:




see: www.timeok.it

On Mon, May 20, 2013 at 1:30 AM, Andy Bardagjy <andy at bardagjy.com> wrote:

> Hi folks, I recently picked up a Symmetricom SA.22c rubidium oscillator.
> According to the datasheet, it outputs a square wave with programmable
> frequency (well you can pick among some set of frequencies).
> I'd like to build up a small circuit locked to the square wave output which
> outputs a 10MHz sine wave for use as my "house clock" for my various
> instruments (spec an, counter etc). I of course could distribute the square
> wave, but am concerned about harmonics, among other things.
> The FE-5680A uses a AD9830A DDS to synthesize its output. Is a DDS the
> right way to go - in terms of performance, phase noise and so on?
> I suppose I could do this with a tank or some other analog circuit, but..
> Andy Bardagjy
> bardagjy.com
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

visit : www.timeok.it

More information about the time-nuts mailing list