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From: firstname.lastname@example.org (Bill Sloman)
Subject: Re: generating calibration voltage
Date: 10 Jan 2003 03:22:49 -0800
References: <email@example.com> <firstname.lastname@example.org> <email@example.com>
NNTP-Posting-Date: 10 Jan 2003 11:22:49 GMT
firstname.lastname@example.org (dB) wrote in message news:<email@example.com>...
> firstname.lastname@example.org (Bill Sloman) wrote in message news:<email@example.com>...
> > firstname.lastname@example.org (dB) wrote in message news:<email@example.com>...
> > The current isn't all that constant, and the OP is asking for
> > a precise calibration voltage.
> ..... and Tom Torfs previously wrote .....
> I would like to generate a +/- 500uV ..... , exact value doesn't
> matter as long as it's stable)
You may make it as a lawyer, but not as an engineer - constant current
diodes are not all that stable against changes in temperature and
> > And how do you propose to "adjust" the constant current diodes?
> I don't.
> > > Match the constant current diodes if necessary. Adjust the values in
> > > the divider to taste.
Ah. You meant *select* approximately matched constant current diodes.
Maybe you wouldn't make it as a lawyer either.
Embedding a single constant current diode in a diode bridge still
strikes me as a better solution than "matching", however you do it,
not that the constant current diode is much of a solution in the first
> Thank you for your constructive observations.
I aim to please.
Bill Sloman, Nijmegen
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