Jean-Marie Bussat wrote:Ooooh! Thanks a lot !!!
Hello,
Does anybody have or can tell me where I can find the spice
model of a 2N3819 model JFET transistor.
Thanks in advance for your help.
Regards,
Jean-Marie
--VoilÃ
P.S. Warning the adress in the from field is wrong, please
use the one below (or remove __NOSPAM__). +---------------------------------------------------------------+
| Jean-Marie Bussat - Laboratoire d'Annecy-le-vieux de Physique |
| des Particules - BP 110 - 74941 ANNECY-LE-VIEUX - FRANCE |
| Email: bus...@lapp.in2p3.fr |
| Tel: +33 (0)4 50 09 17 65 Fax: +33 (0)4 50 09 89 13 | +---------------------------------------------------------------+
.model J2N3819 NJF(Beta=1.57m Lambda=4m Vto=-1.954
+ Cgd=1.5p M=.3821 Pb=1 Fc=.5 Cgs=1.5p Is=173.3f
+ N=1 Xti=3 Kf=37.24E-18 Af=1)
A+ Stef.
El jueves, 11 de junio de 1998 a las 2:00:00 UTC-5, Stephane TOSTI escribió: >> Jean-Marie Bussat wrote:
Ooooh! Thanks a lot !!!Voilà
Hello,
Does anybody have or can tell me where I can find the spice
model of a 2N3819 model JFET transistor.
Thanks in advance for your help.
Regards,
Jean-Marie
--
P.S. Warning the adress in the from field is wrong, please
use the one below (or remove __NOSPAM__).
+---------------------------------------------------------------+
| Jean-Marie Bussat - Laboratoire d'Annecy-le-vieux de Physique |
| des Particules - BP 110 - 74941 ANNECY-LE-VIEUX - FRANCE |
| Email: bus...@lapp.in2p3.fr |
| Tel: +33 (0)4 50 09 17 65 Fax: +33 (0)4 50 09 89 13 |
+---------------------------------------------------------------+
.model J2N3819 NJF(Beta=1.57m Lambda=4m Vto=-1.954
+ Cgd=1.5p M=.3821 Pb=1 Fc=.5 Cgs=1.5p Is=173.3f
+ N=1 Xti=3 Kf=37.24E-18 Af=1)
A+ Stef.
On Sat, 26 Feb 2022 11:14:20 -0800 (PST), jrg lbt <jrglbt09@gmail.com>
wrote:
El jueves, 11 de junio de 1998 a las 2:00:00 UTC-5, Stephane TOSTI escribió:
Ooooh! Thanks a lot !!!
from 1998 . . . .
RL
El jueves, 11 de junio de 1998 a las 2:00:00 UTC-5, Stephane TOSTI escribió: >> Jean-Marie Bussat wrote:
Ooooh! Thanks a lot !!!Voilà
Hello,
Does anybody have or can tell me where I can find the spice
model of a 2N3819 model JFET transistor.
Thanks in advance for your help.
Regards,
Jean-Marie
--
P.S. Warning the adress in the from field is wrong, please
use the one below (or remove __NOSPAM__).
+---------------------------------------------------------------+
| Jean-Marie Bussat - Laboratoire d'Annecy-le-vieux de Physique |
| des Particules - BP 110 - 74941 ANNECY-LE-VIEUX - FRANCE |
| Email: bus...@lapp.in2p3.fr |
| Tel: +33 (0)4 50 09 17 65 Fax: +33 (0)4 50 09 89 13 |
+---------------------------------------------------------------+
.model J2N3819 NJF(Beta=1.57m Lambda=4m Vto=-1.954
+ Cgd=1.5p M=.3821 Pb=1 Fc=.5 Cgs=1.5p Is=173.3f
+ N=1 Xti=3 Kf=37.24E-18 Af=1)
A+ Stef.
On Sat, 26 Feb 2022 11:14:20 -0800 (PST), jrg lbt <jrglbt09@gmail.com>
wrote:
El jueves, 11 de junio de 1998 a las 2:00:00 UTC-5, Stephane TOSTI escribió:
Jean-Marie Bussat wrote:Ooooh! Thanks a lot !!!
VoilÃ
Hello,
Does anybody have or can tell me where I can find the spice
model of a 2N3819 model JFET transistor.
Thanks in advance for your help.
Regards,
Jean-Marie
--
P.S. Warning the adress in the from field is wrong, please
use the one below (or remove __NOSPAM__).
+---------------------------------------------------------------+
| Jean-Marie Bussat - Laboratoire d'Annecy-le-vieux de Physique |
| des Particules - BP 110 - 74941 ANNECY-LE-VIEUX - FRANCE |
| Email: bus...@lapp.in2p3.fr |
| Tel: +33 (0)4 50 09 17 65 Fax: +33 (0)4 50 09 89 13 |
+---------------------------------------------------------------+
.model J2N3819 NJF(Beta=1.57m Lambda=4m Vto=-1.954
+ Cgd=1.5p M=.3821 Pb=1 Fc=.5 Cgs=1.5p Is=173.3f
+ N=1 Xti=3 Kf=37.24E-18 Af=1)
A+ Stef.
.model 2N3819 NJF(Beta=1.304m Betatce=-.5 Rd=1 Rs=1
+ Lambda=2.25m Vto=-3 Vtotc=-2.5m Is=33.57f Isr=322.4f
+ N=1 Nr=2 Xti=3 Alpha=311.7u Vk=243.6 Cgd=1.6p M=.3622
+ Pb=1 Fc=.5 Cgs=2.414p Kf=9.882E-18 Af=1 mfg=Vishay)
from current LTspice distribution.
2N3819 was always poorly defined w/r data sheet.
Many vendors, many wafers, many processes were used.
On Sat, 26 Feb 2022 11:14:20 -0800 (PST), jrg lbt <jrglbt09@gmail.com>
wrote:
El jueves, 11 de junio de 1998 a las 2:00:00 UTC-5, Stephane TOSTI escribió:
Jean-Marie Bussat wrote:Ooooh! Thanks a lot !!!
VoilÃ
Hello,
Does anybody have or can tell me where I can find the spice
model of a 2N3819 model JFET transistor.
Thanks in advance for your help.
Regards,
Jean-Marie
--
P.S. Warning the adress in the from field is wrong, please
use the one below (or remove __NOSPAM__).
+---------------------------------------------------------------+
| Jean-Marie Bussat - Laboratoire d'Annecy-le-vieux de Physique |
| des Particules - BP 110 - 74941 ANNECY-LE-VIEUX - FRANCE |
| Email: bus...@lapp.in2p3.fr |
| Tel: +33 (0)4 50 09 17 65 Fax: +33 (0)4 50 09 89 13 |
+---------------------------------------------------------------+
.model J2N3819 NJF(Beta=1.57m Lambda=4m Vto=-1.954
+ Cgd=1.5p M=.3821 Pb=1 Fc=.5 Cgs=1.5p Is=173.3f
+ N=1 Xti=3 Kf=37.24E-18 Af=1)
A+ Stef.
.model 2N3819 NJF(Beta=1.304m Betatce=-.5 Rd=1 Rs=1
+ Lambda=2.25m Vto=-3 Vtotc=-2.5m Is=33.57f Isr=322.4f
+ N=1 Nr=2 Xti=3 Alpha=311.7u Vk=243.6 Cgd=1.6p M=.3622
+ Pb=1 Fc=.5 Cgs=2.414p Kf=9.882E-18 Af=1 mfg=Vishay)
from current LTspice distribution.
2N3819 was always poorly defined w/r data sheet.
Many vendors, many wafers, many processes were used.
2N3819 was always poorly defined w/r data sheet.
Many vendors, many wafers, many processes were used.
Wow, that's an amazingly crappy part, even for a JFET.
The Fairchild datasheet shows a 15:1 range of pinchoff voltages, and
that's from just one vendor.
They must have made them in saucepans. Actual _good_ JFETs, such as the CPH3910, have much much tighter specs (and much lower noise).I always assumed it reflected the manufacturing processes available at the time. By that time, the planar diffused process was pretty common, and it was much better controlled than using the grown-junction or alloy-junction processes. Good engineers
In article <8ea114da-661e-405f-b96a-3a371d063c76@electrooptical.net>,
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
2N3819 was always poorly defined w/r data sheet.
Many vendors, many wafers, many processes were used.
Wow, that's an amazingly crappy part, even for a JFET.
The Fairchild datasheet shows a 15:1 range of pinchoff voltages, and
that's from just one vendor.
I've always thought of 2N3819 as the JFET analog of the 2N3055 BJT.
It's a convenient part number into which you can reasonably throw a
whole lot of different JFET products. Test what you fab, and if they
don't meet tighter specs for a targeted part number, just call them
2N3819.
On Thursday, April 7, 2022 at 1:30:18 PM UTC-7, Phil Hobbs wrote:learned how to design circuits that could tolerate the variations in those processes and the variations produced by varying operating temperatures and voltages. Ion implantation produced much tighter ranges, but it was still not a common manufacturing
They must have made them in saucepans. Actual _good_ JFETs, such as theI always assumed it reflected the manufacturing processes available at the time. By that time, the planar diffused process was pretty common, and it was much better controlled than using the grown-junction or alloy-junction processes. Good engineers
CPH3910, have much much tighter specs (and much lower noise).
jfeng@my-deja.com wrote:engineers learned how to design circuits that could tolerate the variations in those processes and the variations produced by varying operating temperatures and voltages. Ion implantation produced much tighter ranges, but it was still not a common
On Thursday, April 7, 2022 at 1:30:18 PM UTC-7, Phil Hobbs wrote:
They must have made them in saucepans. Actual _good_ JFETs, such as theI always assumed it reflected the manufacturing processes available at the time. By that time, the planar diffused process was pretty common, and it was much better controlled than using the grown-junction or alloy-junction processes. Good
CPH3910, have much much tighter specs (and much lower noise).
IIRC the usual planar JFET of that era has a Vp range of around 3:1.
This piece of crap's range is 15:1.
Cheers
Phil Hobbs
IIRC the usual planar JFET of that era has a Vp range of around 3:1.My recollection is that there were not very many other commercial JFETs for comparison. And the specs for the MOSFETs were even more poorly controlled because they did not understand the manufacturing hygiene required to control the surface states.
This piece of crap's range is 15:1.
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