DISCRETE NMOS & PMOS, Low V, Low I

Not being a discrete MOS user, I am unfamiliar with what is currently
available.

I need NMOS and PMOS, VDS <= 5V, ID <=500uA

(And truly small... need capacitance as low as possible.)

Operating frequency <= 100KHz

Suggestions?

Thanks!

...Jim Thompson

 

The smallest VMOS types are the Supertex VN01 and VP01
and the ubiquitous 2n7000 2n7002 we know and love. But
these are 500mA-capable parts, with non-trivial die size
and capacitance. If you want really small size and low
capacitance, you'll need to go to some of the discrete
parts we discuss in AoE chapter 3. Or you can go to the
discrete parts found in the old cd4007 ICs. Many of us
are sad not to have good small MOSFETs to work with.

 

Or open one up and use a focused ion beam to mill off the bits you don't
want.

Cheers,

Phil Hobbs (Gearing up to do that with some of my antenna gizmos--wish
me luck)

 

www.google.com same as the rest of us.

Jim

 

So you have no experience with such small device either?

You were SO helpful.

...Jim Thompson

 

There are lots of new JFETs with |Vp|<1V these days, maybe you should
look into those.

 

I need them to be MOSfets.

...Jim Thompson

 

Why, what are you working on?

 

As usual, I can't say.

Which is terribly unfortunate for my image on this newsgroup :-(

Everyone defines me strictly by my political views, when I'm probably
the busiest designer lurking here.

...Jim Thompson

 

I forgot to mention ALD's EPAD devices. Some are
quite small, e.g. the ALD110902, a dual MOSFET with
Ciss = 2.5pF, which is low for a discrete device.
http://www.aldinc.com/ Mouser has 'em for $1.80

 

http://www.linearsystems.com/datasheets/3N165-6.pdf
http://www.linearsystems.com/datasheets/3N170-1.pdf

or perhaps

http://www.linearsystems.com/datasheets/SD214.pdf

or

http://www.linearsystems.com/datasheets/SST824.pdf

 

You can probably safely say something in a general way,
e.g., a battery-power piezo-sensor amplifier, etc.

It's your choice to trash other members on this newsgroup
and regularly insult whole groups of people, just for the
fun of it - your fun that is. Not funny, not appreciated!

 

Trying to find a _low_ current cascoding method that doesn't introduce
cross-product distortion, yet has an effective beta --> very large.

But it's so much fun ;-)

...Jim Thompson

 

Thanks! I'll look these up.

...Jim Thompson

 

CD4007?

John

 

Or these:

http://www.calogic.net/html/mosfet.html

John

 

Yes, as Winfield said, fun for you, but deadly for your victims,
when implemented by Blitzkrieg.

Personally, I find that most sane people around here can recognize
an asshole when they see one, pardon my Minnesota Slang.

And it's not just you - the second member of your mutual
admiration society seems to be Bill Sloman, followed closely
by Michael, Keith, At least one of the Johns, and all manner
of neocon interlopers and troublemakers.

Sure, you like freedom when _you've_ got it, but Freedom in
general, like for people outside of the inner party circle,
well, they don't deserve Freedom, because they (in your
twisted view of the world) are only ignorant beasts of burden.

You wouldn't know real Liberty if it jumped up and bit you in
the ass.

Thanks,
Rich

 

Have you asked your favorite foundries? Some will bond out sample
devices for you, to kick the tires or to lash up something. For really
good customers they might even be free. Usually they won't offer fancy
packages such as SC75 but more likely SO-something and you can't be too
picky about geometry.

 

Gee Rich, that's a gratuitious personal insult, at the level Jim
Thompson aspires to - though his capacity for being rude falls well
short of deadly.

I know you don't appreciate being written off as gullible because
you've been suckered by the "The Global Warming Swindle", but I don't
go out of my way drag your name into arguments in which you aren't
involved, and I'd think better of you if you had the sense not to
exhibit exactly the kind of bad behaviour you are complaining about.

<snip>

 

Not fun, merely tiresome. You and your coterie are trolls of the worst
kind. You are mean and vindictive, but your biggest sin is that you are
just plain boring.

Jim