regarding simulating a verilogams file in cadence for implementing mtj

Two issues:

1. VerilogAMS cannot be used in Spectre, only in AMS Designer. That's because VerilogAMS can contain features that require a digital (event-driven) engine and hence need mixed-signal simulation. This is true even if the VerilogAMS view only uses the analog subset of VerilogAMS. If that's the case (which I would guess it would be for a Magnetic Tunnel Junction device) then you should create a veriloga view instead. This will then be supported during netlisting, and in Spectre too.
2. You appear to have included the gpdk090 models twice, or incorrectly at least. Check your Setup→Model Libraries in ADE to ensure they are not listed twice (also check Setup→Simulation Files in case you have included them there too).

Andrew 

Thanks Andrew!
I have solved the problem of running the simulation in spectre with verilogams code, Now the netlist doesnt give any error
But a new problem is that whenever I try to plot the currents of the terminals the transient analysis is not working, but the plots of voltages are fine, but it could not plot the currents. I am attaching here the plots , netlist file, ams code and the ckt :




Netlist:

// Generated for: spectre
// Generated on: Oct 6 12:28:19 2024
// Design library name: mtj_vd
// Design cell name: test
// Design view name: schematic
simulator lang=spectre
global 0
include "/home/vlsi11/g11/include_ams.scs"
include "/home/eda/cadence/tech/process/gpdk090_v4.6/libs.oa22/gpdk090/../../models/spectre/gpdk090.scs" section=NN

// Library name: mtj_vd
// Cell name: test
// View name: schematic
I0 (pos neut 0 net08 net013 _mz) mtj_model use_as_dmtj=1 \
plank_constant=1.054e-27 electron_charge=1.602e-19 \
gyromagnetic_ratio=1.7608e+07 alpha=0.002 Ms=1050 Hk=250 Vh=0.5 \
Rp=1500 tmr=2 length=6e-06 width=6e-06 thickness=1e-07 tox=1.2e-09 \
kb=1.38e-16 T=300
I1 (net011 net012 net010) Initial kb=1.38e-16 T=300 Ms=1050 Hk=250 \
length=6e-06 width=6e-06 thickness=1e-07
NM0 (net4 net1 pos pos) gpdk090_nmos1v w=(1.2u) l=100n as=336f ad=336f \
ps=2.96u pd=2.96u m=(1)*(1) simM=(1)*(1)
V1 (net1 0) vsource type=pulse val0=5 val1=0 period=10n rise=10p fall=10p \
width=5n
C2 (net4 0) capacitor c=250f
C1 (pos 0) capacitor c=1f
C0 (net1 0) capacitor c=250f
R4 (_mz net010) resistor r=100m
R5 (net013 net012) resistor r=100m
R6 (net08 net011) resistor r=100m
R3 (neut 0) resistor r=1M
V0 (net4 0) vsource dc=5 type=dc
ic _mz=0.5 net013=0.5 net08=0.5 net011=0.5 net012=0.5 net010=0.5
simulatorOptions options reltol=1e-3 vabstol=1e-6 iabstol=1e-12 temp=27 \
tnom=27 scalem=1.0 scale=1.0 gmin=1e-12 rforce=1 maxnotes=5 maxwarns=5 \
digits=5 cols=80 pivrel=1e-3 sensfile="../psf/sens.output" \
checklimitdest=psf
tran tran stop=100n errpreset=conservative write="spectre.ic" \
writefinal="spectre.fc" annotate=status maxiters=5
finalTimeOP info what=oppoint where=rawfile
modelParameter info what=models where=rawfile
element info what=inst where=rawfile
outputParameter info what=output where=rawfile
designParamVals info what=parameters where=rawfile
primitives info what=primitives where=rawfile
subckts info what=subckts where=rawfile
save I0pos I0mz I0my I0mx
saveOptions options save=allpub


it seems like the mtj is not giving output correctly but i am pretty sure my code is fine, but the plot is not showing for currents

Please help me out Sir

Thanks Andrew!
I have solved the problem of running the simulation in spectre with verilogams code, Now the netlist doesnt give any error
But a new problem is that whenever I try to plot the currents of the terminals the transient analysis is not working, but the plots of voltages are fine, but it could not plot the currents. I am attaching here the plots , netlist file, ams code and the ckt :




Netlist:

// Generated for: spectre
// Generated on: Oct 6 12:28:19 2024
// Design library name: mtj_vd
// Design cell name: test
// Design view name: schematic
simulator lang=spectre
global 0
include "/home/vlsi11/g11/include_ams.scs"
include "/home/eda/cadence/tech/process/gpdk090_v4.6/libs.oa22/gpdk090/../../models/spectre/gpdk090.scs" section=NN

// Library name: mtj_vd
// Cell name: test
// View name: schematic
I0 (pos neut 0 net08 net013 _mz) mtj_model use_as_dmtj=1 \
plank_constant=1.054e-27 electron_charge=1.602e-19 \
gyromagnetic_ratio=1.7608e+07 alpha=0.002 Ms=1050 Hk=250 Vh=0.5 \
Rp=1500 tmr=2 length=6e-06 width=6e-06 thickness=1e-07 tox=1.2e-09 \
kb=1.38e-16 T=300
I1 (net011 net012 net010) Initial kb=1.38e-16 T=300 Ms=1050 Hk=250 \
length=6e-06 width=6e-06 thickness=1e-07
NM0 (net4 net1 pos pos) gpdk090_nmos1v w=(1.2u) l=100n as=336f ad=336f \
ps=2.96u pd=2.96u m=(1)*(1) simM=(1)*(1)
V1 (net1 0) vsource type=pulse val0=5 val1=0 period=10n rise=10p fall=10p \
width=5n
C2 (net4 0) capacitor c=250f
C1 (pos 0) capacitor c=1f
C0 (net1 0) capacitor c=250f
R4 (_mz net010) resistor r=100m
R5 (net013 net012) resistor r=100m
R6 (net08 net011) resistor r=100m
R3 (neut 0) resistor r=1M
V0 (net4 0) vsource dc=5 type=dc
ic _mz=0.5 net013=0.5 net08=0.5 net011=0.5 net012=0.5 net010=0.5
simulatorOptions options reltol=1e-3 vabstol=1e-6 iabstol=1e-12 temp=27 \
tnom=27 scalem=1.0 scale=1.0 gmin=1e-12 rforce=1 maxnotes=5 maxwarns=5 \
digits=5 cols=80 pivrel=1e-3 sensfile="../psf/sens.output" \
checklimitdest=psf
tran tran stop=100n errpreset=conservative write="spectre.ic" \
writefinal="spectre.fc" annotate=status maxiters=5
finalTimeOP info what=oppoint where=rawfile
modelParameter info what=models where=rawfile
element info what=inst where=rawfile
outputParameter info what=output where=rawfile
designParamVals info what=parameters where=rawfile
primitives info what=primitives where=rawfile
subckts info what=subckts where=rawfile
save I0pos I0mz I0my I0mx
saveOptions options save=allpub


it seems like the mtj is not giving output correctly but i am pretty sure my code is fine, but the plot is not showing for currents

Please help me out Sir