On Wed, Apr 20, 2011 at 5:40 PM, Oli Glaser <oli.glaser@talktalk.net> wrote=
:

> It's only compliant over a certain range of voltages. A transistor
> current source needs to stay in the active region. You could try using a
> FET if you really need a lower minimum voltage.


Oh! Right, I totally forgot about the active region.
--=20
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