spice model for 2SK711

Tekko · 4th August 2011, 04:29 PM

Does anyone have a spice model for 2SK711 that will work with LTspice ?

ingenieus · 5th August 2011, 09:10 AM

It seems that such a thing is nowhere to be found. Google only returns sites that promises everything but delivers nothing - great big advertisements to sell stuff. Even the Toshiba site came up dry. It may be hidden there, but there's nothing on the page for the 2SK711.

http://www.semicon.toshiba.co.jp/ope...partKey=2SK711

jackinnj · 5th August 2011, 01:08 PM

Put the Id vs Vds chart from the datasheet on your lap, plug in a JFET of known parameters into the simulator and perform DC sweep. Change the parameters until you've got a set which resemble those in the datasheet. It only takes a couple minutes.

The standard SPICE model of the 2SK170 in my simulator (Multisim) seems to be for a "V-Grade" device so I adjusted the parameters until I get the Idss for the BL and GR varieties -- copy these down and use for your own device library. It's nice if you have a curve-tracer to check your work, but you can do the same analysis with a pair of power supplies and a DVM and graph in Excel.

ingenieus · 5th August 2011, 04:06 PM

Here is an example of how to trace curves in LTspice.

To use, rename the file and take off the '.txt' part.

jackinnj · 5th August 2011, 10:54 PM

Here;s a comparison of the SPICE model for the 2SK711 with some commonly used JFETS:

4th August 2011, 04:29 PM	#1
Tekko diyAudio Member Join Date: Jan 2005	spice model for 2SK711 Does anyone have a spice model for 2SK711 that will work with LTspice ? __________________ The point of life is to build atleast one audio amplifier before you die.

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5th August 2011, 09:10 AM	#2
ingenieus diyAudio Member Join Date: Apr 2011	It seems that such a thing is nowhere to be found. Google only returns sites that promises everything but delivers nothing - great big advertisements to sell stuff. Even the Toshiba site came up dry. It may be hidden there, but there's nothing on the page for the 2SK711. http://www.semicon.toshiba.co.jp/ope...partKey=2SK711

5th August 2011, 01:08 PM	#3
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Put the Id vs Vds chart from the datasheet on your lap, plug in a JFET of known parameters into the simulator and perform DC sweep. Change the parameters until you've got a set which resemble those in the datasheet. It only takes a couple minutes. The standard SPICE model of the 2SK170 in my simulator (Multisim) seems to be for a "V-Grade" device so I adjusted the parameters until I get the Idss for the BL and GR varieties -- copy these down and use for your own device library. It's nice if you have a curve-tracer to check your work, but you can do the same analysis with a pair of power supplies and a DVM and graph in Excel.

5th August 2011, 10:54 PM	#5
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Here;s a comparison of the SPICE model for the 2SK711 with some commonly used JFETS:

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