In article et,
Robert Baer wrote:
[...]
Wouldn't a zener running in (or near) the (easily seen on curve
tracer) negative resistance mode have lots of noise?


There's noise and then there's noise. Any signal we don't want we call
noise. A noise source for instumentation needs to have a flat spectrum.
The noise on a zener is a good example of the former and poor example of
the latter.

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