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-   -   Spice JFET and MOSFET´s .model (http://www.diyaudio.com/forums/software-tools/215282-spice-jfet-mosfet-s-model.html)

Osvaldo de Banfield 28th June 2012 12:22 PM

Spice JFET and MOSFET´s .model
 
Accordingly to this stuff, and manufacturer´s data sheet, I have made my own .models for some common JFET´s And MOSFET´s for Spice soft. I want to share them. In few time I´do for other field effect transistors. Those has been tested in a simulation of a reality working circuit, my OSF. Enjoy.

.model 2SK117Y NJF(beta=6.323m vto=-0.547 is=-1n cgd= 8.0445p cgs=4.9555p lambda=65.89 mfg=TOSHIBA)
.model 2SK117GR NJF(beta=13.7m vto=-0.547 is=-1n cgd= 8.0445p cgs=4.9555p lambda=30.41 mfg=TOSHIBA)
.model 2SK117BL NJF(beta=30.55m vto=-0.547 is=-1n cgd= 8.0445p cgs=4.9555p lambda=13.64 mfg=TOSHIBA)

.model 2SK170GR NJF(beta=13.7m vto=-0.547 is=-1n cgd= 16.089p cgs=13.91p lambda=20m mfg=TOSHIBA)
.model 2SK170BL NJF(beta=28.283m vto=-0.547 is=-1n cgd= 1.119p cgs=11.881p lambda=9.72m mfg=TOSHIBA)
.model 2SK170V NJF(beta=47.14m vto=-0.547 is=-1n cgd= 1.119p cgs=11.881p lambda=5.833m mfg=TOSHIBA)

datjblvietnam 30th June 2012 06:15 AM

This is interesting .Thanks a lot !

Osvaldo de Banfield 5th July 2012 12:04 PM

More models
 
Here are more model generated of my own:

.model 2SJ103Y PJF(beta=1.053m vto=-1.342 is=1n cgd=8.0445p cgs=4.9555p lambda=34.8 mfg=TOSHIBA)
.model 2SJ103GR PJF(beta=2.283m vto=-1.342 is=1n cgd=8.0445p cgs=4.9555p lambda=16 mfg=TOSHIBA)
.model 2SJ103BL PJF(beta=5.092m vto=-1.342 is=1n cgd=8.0445p cgs=4.9555p lambda=7.2 mfg=TOSHIBA)

.model 2SK246Y NJF(beta=13.7m vto=-0.648 is=-1n cgd=16.089p cgs=13.91p lambda=35.14m mfg=TOSHIBA)
.model 2SK246GR NJF(beta=28.283m vto=-0.648 is=-1n cgd=1.119p cgs=11.881p lambda=16.22m mfg=TOSHIBA)
.model 2SK246BL NJF(beta=47.14m vto=-0.648 is=-1n cgd=1.119p cgs=11.881p lambda=7.274m mfg=TOSHIBA)

.model 2SK389GR NJF(beta=13.7m vto=-0.547 is=-1n cgd=14.74p cgs=10.25p lambda=6m mfg=TOSHIBA)
.model 2SK389BL NJF(beta=28.283m vto=-0.547 is=-1n cgd=14.74p cgs=10.25p lambda=2.9m mfg=TOSHIBA)
.model 2SK389V NJF(beta=47.14m vto=-0.547 is=-1n cgd=14.74p cgs=10.25p lambda=1.74m mfg=TOSHIBA)

kevinkr 12th July 2012 04:35 PM

:cop: 2SJ103 model corrected per Osvaldo's request.

Osvaldo de Banfield 12th July 2012 04:58 PM

Quote:

Originally Posted by kevinkr (Post 3089980)
:cop: 2SJ103 model corrected per Osvaldo's request.

Many thanks, Kevin.

Apologize by the inconvenience.

Here I add one more:

.MODEL 2SK2692 NMOS(mfg=TOSHIBA LEVEL=3 L=1n W=5.952 KP=62.5u VTO=1.265 CGSO=120p CGDO=20p)

Good luck!

tvrgeek 7th August 2012 01:24 PM

Wooo Hooo! Much thanks

Osvaldo de Banfield 7th August 2012 01:34 PM

Quote:

Originally Posted by tvrgeek (Post 3117748)
Wooo Hooo! Much thanks

Ok, boy. I did this work of my own, because I find that some models are by there, really didn't work properly. I did a all-FEt audio amplifier that worked fine in the proto-board, but when after I simulate it, there was too error from real circuit to the simulations. Following the models I did from the above mentioned stuff, the simulation was pretty close to the real circuit.

For example: The real circuit was giving near 10Vpp at 440Hz immediately after clipping with 12V power supply, and the first models I found and use, clip with 8.3V or so. With my self-made models, clipping was very near 10V, circa 9.8V. So model appears to be more accurate.

And none of them make difference between manufacturer's IDSS range, mine does.

Enjoy.

EUVL 20th August 2012 09:13 AM

The Cgd values for differtent grades of 2SK170 & 2SK246 are inconsistent, and I believe incorrect.


Patrick

Jay 20th August 2012 11:03 AM

Quote:

Originally Posted by Osvaldo de Banfield (Post 3117756)
For example: The real circuit was giving near 10Vpp at 440Hz immediately after clipping with 12V power supply, and the first models I found and use, clip with 8.3V or so. With my self-made models, clipping was very near 10V, circa 9.8V. So model appears to be more accurate..

Hopefully your device is original from Toshiba. Even so, I think the spread of the typical performance in JFET is quite large. Later I will compare yours with the ones from Fred Dieckmann that I found accurate. I'm not comfortable with low decimal places, incomplete parameters etc.

Osvaldo de Banfield 28th August 2012 12:23 PM

Quote:

Originally Posted by EUVL (Post 3133273)
The Cgd values for differtent grades of 2SK170 & 2SK246 are inconsistent, and I believe incorrect.


Patrick

Ok, yes, may be a error in my calculus, but in this case try your own values, and compare with mines.


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