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MOSFET DC characteristics
Posted Mar 24, 2011, 8:48 a.m. EDT 1 Reply
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hi all,
I am trying to simulate the DC characteristics of MOSFET but when i solve the model i get following errors
Error: 9111
Unknown function
- Function: flgauss
Failed to evaluate variable.
- Variable: Ndoping
- Defined as: (((NDimpl*flgauss(x,y,x1,0,ch))-NAsub)+(flgauss((x2-x),y,x1,0,ch)*NDimpl))
Failed to evaluate variable.
- Variable: p_init
- Defined as: ((((ni^2)/(sqrt(((ni^2)+((Ndoping^2)/4)))+(abs(Ndoping)/2)))*(Ndoping>=0))+(((abs(ndoping)/2)+sqrt(((ni^2)+((ndoping^2)/4))))*(ndoping<0)))
Failed to evaluate variable.
- Variable: phi_init
- Defined as: (((Vt*(((-log((p_init/ni)))*(Ndoping<0))+(log((n_init/ni))*(Ndoping>=0))))-X_si)-(0.5*Eg_si))
Failed to evaluate expression.
whats wrong with this model can anyone please guide me
Regards
waseem
I am trying to simulate the DC characteristics of MOSFET but when i solve the model i get following errors
Error: 9111
Unknown function
- Function: flgauss
Failed to evaluate variable.
- Variable: Ndoping
- Defined as: (((NDimpl*flgauss(x,y,x1,0,ch))-NAsub)+(flgauss((x2-x),y,x1,0,ch)*NDimpl))
Failed to evaluate variable.
- Variable: p_init
- Defined as: ((((ni^2)/(sqrt(((ni^2)+((Ndoping^2)/4)))+(abs(Ndoping)/2)))*(Ndoping>=0))+(((abs(ndoping)/2)+sqrt(((ni^2)+((ndoping^2)/4))))*(ndoping<0)))
Failed to evaluate variable.
- Variable: phi_init
- Defined as: (((Vt*(((-log((p_init/ni)))*(Ndoping<0))+(log((n_init/ni))*(Ndoping>=0))))-X_si)-(0.5*Eg_si))
Failed to evaluate expression.
whats wrong with this model can anyone please guide me
Regards
waseem
1 Reply Last Post Mar 24, 2011, 8:51 a.m. EDT
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Posted:
1 decade ago
Hi
it says that your function "flgauss", used for Ndoping, which itself is used in the initialisation of "p" and "phi", is not defined
I would start to check the formula for your "Ndoping", are you missing a () or is something not well defined therein ?
--
Good luck
Ivar
it says that your function "flgauss", used for Ndoping, which itself is used in the initialisation of "p" and "phi", is not defined
I would start to check the formula for your "Ndoping", are you missing a () or is something not well defined therein ?
--
Good luck
Ivar