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Old 28th June 2012, 12:22 PM   #1
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Default 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)
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Last edited by Osvaldo de Banfield; 29th June 2012 at 01:03 PM.
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Old 30th June 2012, 06:15 AM   #2
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This is interesting .Thanks a lot !
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Old 5th July 2012, 12:04 PM   #3
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Default 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)
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Old 12th July 2012, 04:35 PM   #4
kevinkr is offline kevinkr  United States
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2SJ103 model corrected per Osvaldo's request.
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Old 12th July 2012, 04:58 PM   #5
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Quote:
Originally Posted by kevinkr View Post
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!
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Last edited by Osvaldo de Banfield; 12th July 2012 at 05:02 PM.
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Old 7th August 2012, 01:24 PM   #6
tvrgeek is offline tvrgeek  United States
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Wooo Hooo! Much thanks
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Old 7th August 2012, 01:34 PM   #7
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Quote:
Originally Posted by tvrgeek View Post
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.
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Old 20th August 2012, 09:13 AM   #8
EUVL is offline EUVL  Europe
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The Cgd values for differtent grades of 2SK170 & 2SK246 are inconsistent, and I believe incorrect.


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Old 20th August 2012, 11:03 AM   #9
Jay is offline Jay  Indonesia
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Quote:
Originally Posted by Osvaldo de Banfield View Post
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.
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Old 28th August 2012, 12:23 PM   #10
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Quote:
Originally Posted by EUVL View Post
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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