[time-nuts] DMTD - analog multiplier vs. diode mixer ?

paul swed paulswedb at gmail.com
Tue Jan 5 20:17:38 UTC 2016

I have some guesses but I look forward to others.
I think the analog multipliers are complicated in pins and support
circuitry especially if single power supply.
I used lower frequency Analog Devices units in early experimentation on the
wwvb d-psk-r.
Granted they worked. They were also pricey. But thats relative.
They can deliver gain as compared to a mixer and thats a plus.

On Tue, Jan 5, 2016 at 2:56 PM, Poul-Henning Kamp <phk at phk.freebsd.dk>

> My little HP5065 project is continually running into the jitter of
> my HP5370B counter which is annoying me, so I'm looking int DMTD.
> Everybody seems to be using traditional diode-mixers for DMTD,
> and to be honest I fail to see the attraction.
> Why wouldn't a analog multiplier like AD835 be better idea ?
> What am I overlooking ?
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.
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