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I'll be happy to design a PCB, and have bare PCB prototypes made.
Sourcing parts and purchasing them will be another, larger project!
Joel Setton
On 30/01/2015 14:24, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
On 30 January 2015 at 12:25, Will wrote:
The boards are factory reject
Frank (and all!),
These are all very valid questions.
The context is a hobby activity, and the purpose of the reference
voltage is to have something which is good enough to calibrate, for
example, a 30-year old DVM after restoring or repairing it. With
currently available reference chips, 3 1
the DVMs I have seen with
the LM199 / LTZ1000 use "soft calibration" in which the calibration
coefficient is stored in memory, and the voltage measurement is
performed in ratiometric mode. Building a 10V reference is a rather
different problem.
As before, comments and suggestions will
help would be appreciated!
Joel Setton
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nyone have any experience with
such a project? It looks good on paper, but what kind of stability can I
reasonably expect?
Many thanks!
Joel Setton
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not to change a good thing.
Just my $0.02 worth!
Joel Setton
On 10/04/2014 18:55, Steven J Banaska wrote:
As Tom said the 10M input impedance is used for the high voltage ranges
because it is a resistive divider (9.9M/100k) that can handle high voltages
without much drift. Caddock THV or HVD are
