Christoph Maier wrote:
By sheer coincidence, I used a circuit to get enough voltage for a green
LED from only 700mV as proof-of-concept for wine:
http://www.kernel-panic.org/Members/cmaier/hamburger-lugnut-log/archive/2007/02/04/both-linuxes-emulate-windows-xp/
(by the way, Plone still doesn't work quite right, *&[EMAIL PROTECTED])
but you'd need an AC waveform for the charge pumps to work.
It's not easy at all to build a DC to AC converter that works from
700mV.
What do you mean by DC to AC converter?
If all you need is to generate an AC waveform, MOSFET ring oscillators
work just fine at .7 V. They're a little slow by VLSI standards, but
probably faster than anything a home hobbyist is likely able to measure.
If you need to actually boost the voltage, that's a different ball game.
You can probably do it with MOSFET's and passives if you try hard enough.
However, Schottky or germanium diodes are probably an easier solution if
much lossier.
-a
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