>I'm looking at the potential of using a pic output, possibly PWM, to drive
a
>charge pump/switched capacitor circuit for generation of negative voltages.
>I need approx 10mA at -15v.  I'm trying to avoid that extra chip or 2.   A
>home brew 7660?
>
>I'm sure someone has been there before.  Has anyone had any luck in this
>area, have circuit concepts, good references, or theory.
>
>TIA
>Mitch Robbins
>

I did it, but to generate -5V for op-amp supply with just 2 caps and 2
diodes.

Octavio
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Octavio Nogueira  - e-mail:   nogueira@mandic.com.br
http://www.geocities.com/~oct_nogueira
"ProPic" Production PIC Programmer Windows under US$20
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