Stats

  • Locked Locked
  • Replies 1
  • Subscribers 166
  • Views 11376
  • Members are here 0
More Content
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Designing SiC MOSFET Model

ojaspice

Hi, 

I keep getting these error messages with my netlist when i try to simulate in a simple double pulse test circuit.

Netlist:

*SICPOWER1200
.SUBCKT SICPOWER1200 1 2 3
********* ********* ********* ********* ********* ********* ********* ********* ********* *********
.FUNC I1 (VGS,VDIS) {IF(VDIS<(VGS-3.5)/0.54,(1.08*(VGS-3.5)*VDIS-0.941*(VGS-3.5)**0.82),0)}
.FUNC I12 (VGS) {IF(VDIS>=((VGS-3.5)/0.54),(0.27*(VGS-3.5)**2),0)}
.FUNC I2 (VGS,VDIS) {IF(VDIS<(VGS-6.15)/0.54,(2.7*(VGS-6.15)*VDIS-0.941*(VGS-6.15)**0.47),0)}
.FUNC I22 (VGS) {IF (VDIS>=((VGS-6.15)/0.54),(0.405*(VGS-6.15)**2),0)}
.FUNC CGD (VGD) {(1.72*EXP**(-12)) / 0.6617 + 0.9312*SQRT(ABS(12.3-VGD))*(1-TANH(VGD-12.3))}
VDI DI DI1 0
CDS 11 22 55N
COX DI 33 2.6P
CGD DI1 11 VALUE = {CGD (V(2)-V(1))}
GICH1 22 23 VALUE = {I1 (V(2)-V(3),V(DI)-V(1))}
GICH1 23 24 VALUE = {I12 (V(2)-V(3))}
GICH1 24 25 VALUE = {I2 (V(2)-V(3),V(DI)-V(1))}
GICH1 25 DI VALUE = {I22 (V(2)-V(3))}
CGS 33 22 1.6N
RDRIFT DI1 11 257M
.ENDS SICPOWER1200

Error:

**** EXPANSION OF SUBCIRCUIT X_X1 ****
.FUNC I1
------$
ERROR(ORPSIM-16265): Missing or mismatched ()
+ VGS VDIS {IF(VDIS<(VGS-3.5)/0.54,(1.08*(VGS-3.5)*VDIS-0.941*(VGS-3.5)**0.82),
+ 0)}
.FUNC I12
------$
ERROR(ORPSIM-16265): Missing or mismatched ()
+ VGS {IF(VDIS>=((VGS-3.5)/0.54),(0.27*(VGS-3.5)**2),0)}
.FUNC I2
------$
ERROR(ORPSIM-16265): Missing or mismatched ()
+ VGS VDIS {IF(VDIS<(VGS-6.15)/0.54,(2.7*(VGS-6.15)*VDIS-0.941*(VGS-6.15)**0.47),
+ 0)}
.FUNC I22
------$
ERROR(ORPSIM-16265): Missing or mismatched ()
+ VGS {IF (VDIS>=((VGS-6.15)/0.54),(0.405*(VGS-6.15)**2),0)}
.FUNC CGD
------$
ERROR(ORPSIM-16265): Missing or mismatched ()
+ VGD {(1.72*EXP**(-12)) / 0.6617 + 0.9312*SQRT(ABS(12.3-VGD))*(1-TANH(
+ VGD-12.3))}
X_X1.VDI X_X1.DI X_X1.DI1 0
X_X1.CDS X_X1.11 X_X1.22 55N
X_X1.COX X_X1.DI X_X1.33 2.6P
X_X1.CGD X_X1.DI1 X_X1.11 X_X1.VALUE {CGD (V(2)-V(1))}
-------------------------------------$
ERROR(ORPSIM-16318): Missing or invalid expression
X_X1.GICH1 X_X1.22 X_X1.23 VALUE {I1 (V(1#)-V(2#),V(DI)-V(0#))}

ERROR(ORPSIM-15089): Can not re-define X_X1.GICH1. X_X1.GICH1 is either a system defined variable or has already been defined
X_X1.GICH1 X_X1.23 X_X1.24 VALUE {I12 (V(1#)-V(2#))}

ERROR(ORPSIM-15089): Can not re-define X_X1.GICH1. X_X1.GICH1 is either a system defined variable or has already been defined
X_X1.GICH1 X_X1.24 X_X1.25 VALUE {I2 (V(1#)-V(2#),V(DI)-V(0#))}

ERROR(ORPSIM-15089): Can not re-define X_X1.GICH1. X_X1.GICH1 is either a system defined variable or has already been defined

ERROR(ORPSIM-15113): Model VALUE used by X_X1.CGD is undefined
  • oldmouldy

    There cannot be white space between the Function Name and the Parameters list: I1(VDS,VDIS). The "I" expressions use two parameters in all cases but they don't all have two parameters in the parameter list. GICH1 has 4 defining expressions, hence the "has already been defined" message. The value for an intrinsic C component must have a constant as the value, like CGS has, a variable capacitor, for CGD, will need to be modelled with ABM components.

Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.