www.circuitcellar.com is a magazine that last month had an acrtile on charge
pumps.

michael


-----Original Message-----
From: Mitch Robbins <robm@AM2.COM>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Sunday, April 05, 1998 11:25 AM
Subject: charge pump from pic


>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
>