[volt-nuts] The care and feeding of LM399's (was: Traveling Standards)

Rob Klein rob.klein at smalldesign.nl
Sat Aug 27 14:10:13 UTC 2011


Take a look at the first part (up to ~7:30) of this:
http://www.youtube.com/watch?v=2N6cjGS7lUE

(the rest is interesting stuff, too)


Rob.

Op 26-8-2011 21:27, Randy Scott schreef:
>> In this case I would use a more stable resistor.
>> A precision wirewound (NEOHM UPW50 or Riedon USR2) of 10k in parallel with a 41K2 15ppm 0.1% Metal film (RC55Y).
>
> Any benefit in switching to a precision current source instead of the resistor?  A LT3092, for example, potentially with a LT1634-1.25 reference on the SET pin (as in one of the example circuits in the LT3092 datahseet).
>
> Randy.
>
>
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