Sean,
For very low voltage application it's important for which Vd the Vgs
threshold is defined.
If you take a closer look you'll see that Vgs=3D0 is for Vd=3D100mV. (I saw=
 it
as 200mV somewhere)
That was the numbers meaning I've gave.

Do you know other mosfets with Vgs near zero (saying at least  0.2V-0.5V)?
I need something less fancy, not in pair.

thx,
Vasile

On Tue, Nov 24, 2015 at 3:14 AM, Sean Breheny <shb7@cornell.edu> wrote:

> Very interesting device, but the Vgs_max is 10V, not 200mV, and the Rds_o=
n
> is >100K ohms for Vgs=3D0V, and 500 ohms for Vgs=3D4V. In fact, it looks =
like
> what they are doing is, first, exploiting the subthreshold operation (whi=
ch
> is not a new technique but it is a bit of a stretch to call it "ON") and
> then using a floating gate, as I suggested, to fine tune the Vgs
> characteristic to obtain very good matching for multiple FETs in the same
> device and tight tolerances in general:
>
> http://www.aldinc.com/ald_epadfaq.php
>
> Sean
>
>
> On Mon, Nov 23, 2015 at 2:22 AM, embedded systems <piclist9@gmail.com>
> wrote:
>
> > Hi Sean,
> > I've searched for low Vgs/Vd mosfets for RF (and other kind of)
> > harvesting. I found this one:
> > http://www.aldinc.com/pdf/ALD110800.pdf
> >
> > Unfortunately not available in my corner of the world.
> > However, around us is a lot of wasted energy. Only if will be able to
> > collect just the 50/60Hz hum and our microcontrollers will run for free=
..
> >
> > best,
> > Vasile
> >
> > On Sun, Nov 22, 2015 at 10:39 PM, Sean Breheny <shb7@cornell.edu> wrote=
:
> >
> > > 0V threshold I can understand (it's either depletion mode or has a
> > floating
> > > gate inside that biases it toward ON) but what do you mean by 0.2V
> drain?
> > > You mean 200mV maximum Vds in the OFF state? That I have not seen.
> > >
> > > On Sat, Nov 21, 2015 at 7:06 AM, embedded systems <piclist9@gmail.com=
>
> > > wrote:
> > >
> > > > There are a lot of mosfets with gate threshold voltage between 2V a=
nd
> > 4V.
> > > > The short answer is yes.
> > > >
> > > > BTW, there are a few mosfets with 0V threshold voltage and 0.2V dra=
in
> > > > voltage.
> > > >
> > > > Vasile
> > > >
> > > > <http://mailman.mit.edu/mailman/listinfo/piclist>
> > > >
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