On 3/6/07, Alexandre Guimar=E3es <listas@logikos.com.br> wrote:
>
> Hi,
>
> > Would it be silly of me to suggest a current mirror?
> > A pair of transistors, and a couple resistors.
>
>    Could you elaborate that ? It is not obvious to me how a current mirror
> can be used in this application.


Ok, picture a mirror made with a pair of PNP transistors, with emitters to
VCC.
Set up the sensing side to go 1mA (or some other convenient number) when -V
is at max.
On the other side, you get 0-1mA which you can then sense across a 1k
resistor to ground as 0-1V, or scale any other way that's convenient.
-- =

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