Help Solving an Aim-Spice HFET Modeling Issue with VAX

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The discussion revolves around troubleshooting an HFET model in Aim-Spice, specifically focusing on IV modeling issues. The user provides a detailed model configuration and requests assistance in identifying potential mistakes. Key questions include the nature of errors encountered, whether they are related to SPICE compilation or behavioral anomalies, and how to manage the decrease in Di current value. Participants are encouraged to clarify the specific errors to facilitate effective troubleshooting. The conversation emphasizes the importance of accurate model parameters for successful simulation outcomes.
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Good day!

Please help me with HFET model for Aim-Spice!

I have a problem with IV modeling...

VAX
vds 1 0
vids 1 100
A1 100 2 0 Mhemt l=0.3u w=150u
vgs 2 0
.MODEL Mhemt PHFET
+d1=0.03e-6
+delta=3
+deltad=4.5e-9
+di=0.01e-6
+epsi=1.0841e-10
+eta=1.4
+lambda=0.05
+m=3
+mu=0.4
+nmax=2e16
+rd=0
+rs=0
+sigma0=0.03
+vs=0.8e5
+vto=0.7

please find a mistake in listing...

p.s soory for my english
 
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ArtemSH said:
Good day!

Please help me with HFET model for Aim-Spice!

I have a problem with IV modeling...

VAX
vds 1 0
vids 1 100
A1 100 2 0 Mhemt l=0.3u w=150u
vgs 2 0
.MODEL Mhemt PHFET
+d1=0.03e-6
+delta=3
+deltad=4.5e-9
+di=0.01e-6
+epsi=1.0841e-10
+eta=1.4
+lambda=0.05
+m=3
+mu=0.4
+nmax=2e16
+rd=0
+rs=0
+sigma0=0.03
+vs=0.8e5
+vto=0.7

please find a mistake in listing...

p.s soory for my english

Welcome to the PF. What error are you getting? Is it a SPICE compiler error, or a behavioral anomoly?
 
As the DI value of current becomes smaller, this effect should not be. How can I make with a decrease in Di current value decreased?

[PLAIN]http://imgsnack.com/images/1msm.png
 
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