From: Jim <jim@jpes.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Wed, 8 Jan 2020 08:09:17 -0800
Subject: RE: [EE]: LTSpice Question
Thread-Topic: [EE]: LTSpice Question
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 Bob,

 Yes, I'm aware of that functionality.  It's just that I don't know if
any of the parts that are in the drop down=20
 list are depletion mode FET's, and if so, which one?  I could go
through each one and check, but the list is rather=20
 long and it would take some time to get through them all.  =20

 I think I'll just check online for depletion mode FET models, and use
one there.  It probably will be quicker.

 Thanks to all for your input.

 Regards,

 Jim

> -------- Original Message --------
> Subject: Re: [EE]: LTSpice Question
> From: Bob Blick <bobblick@outlook.com>
> Date: Tue, January 07, 2020 6:08 pm
> To: "Microcontroller discussion list - Public." <piclist@mit.edu>
>=20
>=20
> Hi Jim,
> Have a schematic open or start a new one. Click on the gate icon in the t=
oolbar, then select "njf" from the chooser that opens up. Drop the part ont=
o your schematic, it should look like a FET, then right-click on it and hit=
 "choose a new JFET". A new selector should pop up with a dozen or more JFE=
T parts to choose from.
> Friendly regards, Bob
>=20
> ________________________________________
> From: piclist-bounces@mit.edu <piclist-bounces@mit.edu> on behalf of Jim
> Sent: Tuesday, January 7, 2020 3:32 PM
> To: Microcontroller discussion list - Public.
> Subject: RE: [EE]: LTSpice Question
>=20
>=20
>  Bob,
>=20
>  Thanks for the info.  A JFET might even work to test the theory.
>  Do you happen to know the part number for a JFET that is included in
> the Spice program?
>  I haven't chosen a specific FET or a particular vendor yet, so their
> models are viable at this point.
>  However, if I can't find one within the program, I may have to go that
> route.
>=20
> Thanks and Regards,
>=20
> Jim
>=20
> Regards,
>=20
> Jim
>=20
> > -------- Original Message --------
> > Subject: Re: [EE]: LTSpice Question
> > From: Bob Blick
> > Date: Tue, January 07, 2020 3:22 pm
> > To: "Microcontroller discussion list - Public." <piclist@mit.edu>
> >
> >
> > The vendor of your MOSFET should be able to supply SPICE models of thei=
r parts.
> >
> > Incorporating them into LTSPICE is easy using an .include statement
> >
> > As far as I know the only depletion mode FETs in the standard LTSPICE l=
ibrary are JFETs.
> >
> > Best regards, Bob
> >
> > ________________________________________
> > From: piclist-bounces@mit.edu <piclist-bounces@mit.edu> on behalf of Ji=
m
> > Sent: Tuesday, January 7, 2020 11:55 AM
> > To: Microcontroller Public
> > Subject: [EE]: LTSpice Question
> >
> >
> >  All,
> >
> >  I have a need to simulate a circuit using a Depletion Mode MOSFET usin=
g
> > LTSpice.
> >  I have looked at the list of MOSFETs included in the application, but =
I
> > don't see any Depletion Mode FETs.
> >  Does anyone have any idea what part number in LTSpice could be a
> > Depletion Mode MOSFET?  Or does anyone have a model of
> >  an N Channel Depletion Mode MOSFET that will run under LTSpice?
> >  The parameters of the particular part number aren't an important issue
> > at this time.  I just need a functional model
> >  for a quick proof of concept for a new circuit for a new product at
> > work.   I can't elaborate on this further at the
> >  moment, but later, if all works out, I'll let everyone know that is
> > interested what the circuit is intended to do, and
> >  if it does what it's supposed to.
> >
> >  Anyway, if anyone knows if any of the MOSFET part numbers listed in
> > LTSpice are Depletion Mode FET's, please let me
> >  know.
> >
> >
> >  Thanks and Regards,
> >
> >  Jim
>=20
> --=20
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