ivp wrote:
>=20
> I've looked around and found switched capacitor and capacitor-diode
> designs for positive doublers, positive triplers but not greater than
> unity
> inverters. Some of those designs I've used before and found them quite
> adequate. A Schottky diode-capacitor inverter is pretty close to -5V
> but I think a tripler would be better than a doubler so I can adjust down
> to -10V
>=20
> For the time being I'm using an SMPS IC to make it but would like to
> know if it's possible with discretes, and without an inductor if that's
> possible. Unless the omission of an inductor means the inclusion of a
> heap of other components
>=20
Since you start from positive 5V to generate -15V to finally adjust it to
-10V, you should build a quadrupler, not a tripler (6 caps, 6 diodes). A lo=
t
of components to replace 1 cap, 1 schottky diode and 1 inductor (well maybe
1 more diode to leave the PIC quiet)...

-----
Best regards,

Philippe.

http://www.pmpcomp.fr Pic Micro Pascal for all!=20
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