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TFETs (Read 5663 times)
nosrat
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Re: TFETs
Reply #15 - Jun 14th, 2016, 2:17am
 
Thanks a lot Mr. Geoffrey
In the verilog –A code for the model, I  have done the changes you asked:

 real   Ids, Qs, Qd, Qg;
  (*  desc="Cgd"  *)   real Cgd;
  (*  desc="Cgs"  *)    real Cgs;


And  for  print command in  Hspice, I have used below lines:

.DC  Vg 0 0.5 0.001
.print dc Cgd
.print dc Cgs


But after running simulation, this warning appears on ‘file.lis’:
 **warning** (cgdntfet.sp:35) Unrecognized output type cgs on line above; The line is ignored.

ac output variable type=s      not allowed for transient or dc

So still I couldn’t print them (Cgd , Cgd).
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Geoffrey_Coram
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Re: TFETs
Reply #16 - Jun 14th, 2016, 6:12am
 
You need to reference the element - how does the simulator know what you mean by Cgd?  

I think you want
.print dc x1:Cgs
.print dc x1:Cgd

For a BSIM4 transistor, you'd have had something like
.print dc m1:cgdb
I asked you to show an example for a BSIM4 transistor so you would look up the proper syntax (which I had to look up for you).
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nosrat
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Re: TFETs
Reply #17 - Jun 15th, 2016, 3:17am
 
Dear Mr. Coram

Thanks for your excellent comments

I have done it  and gotten  Cgd/Cgs –Vg numerical values  in output  file.lis , but  for drawing graphic curve when simulation is completed, I  put file.sp  in the Avan Wave to see the curve. But then, the Avan Wave stops working. I think this problem happens when we write . print dc  xn1:Cgd  in  netlist. Is it possible to you to help me on this one, too? Sorry for bothering you this much …

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Geoffrey_Coram
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Re: TFETs
Reply #18 - Jun 15th, 2016, 8:42am
 
nosrat wrote on Jun 15th, 2016, 3:17am:
Avan Wave stops working.


Sounds like a problem for the vendor ...

but you could try changing .print to .plot, if you're trying to get a plot.
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zeropond
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Re: TFETs
Reply #19 - Apr 6th, 2017, 9:38am
 
Hello Smiley
I am zeropond. I am a new member of this forum site. But, I have only known that the TFET is tunnel field effect transistors are those transistors which interest band to band tunneling. In tunneling band to band is formation when electron in the valence band semiconductor tunnels accros band gap of the conducting band without traps.
Thank You Smiley
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