[time-nuts] HP5065A C-field current voltage mod
Poul-Henning Kamp
phk at phk.freebsd.dk
Sun Sep 6 07:47:35 EDT 2015
--------
In message <1557706566.2101400.1441521513941.JavaMail.yahoo at mail.yahoo.com>, Pe
rry Sandeen via time-nuts writes:
> TheTL 431 is listed as a low noise shunt regulator. It doesn’t
>measure temperature at all. Theonly noise spec I could find is about
>7 uV. A LM723 data sheet specified 2.5 uV noise. The REF 012A
>specifies 5 uVnoise. The first two are around 50 cents from Mouser.
>The REF102A is about 10X more.
Stuff like that seldom happen by chance :-)
TL431 is amazing and very versatile, but it does not look like the
right solution to me in this case.
--
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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