[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


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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
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Never attribute to malice what can adequately be explained by incompetence.


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