[volt-nuts] How to keep voltage stable in the sub-100nV range?
Poul-Henning Kamp
phk at phk.freebsd.dk
Wed Nov 2 04:05:17 EDT 2016
--------
In message <5818975F.8000603 at yandex.com>, Charles Steinmetz writes:
>Of course, having to wait for settling to within 24 bits will put a real
>limit on how fast you can change the voltage (how long you have to wait
>after commanding a change before you can rely on the output voltage).
You can speed it up a LOT by intentionally overshooting the DAC for a
short period, provided you have very carefully calibrated the time
constants of the LP filters after it.
BTW: A good place to get some inspiration is the HP3245A service manual.
--
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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