[time-nuts] DMTD - analog multiplier vs. diode mixer ?
bruce.griffiths at xtra.co.nz
Tue Jan 5 20:19:13 UTC 2016
You could also consider a DDMTD as useed in CERN's White rabbit project.Apart from the sine to logic level conversion its all digital. With care in the design the jitter should be sub picosecond.
On Wednesday, 6 January 2016 9:01 AM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
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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