Product Documentation
Spectre Circuit Simulator Components and Device Models Reference
Product Version 23.1, June 2023

Component Statements

Model Definition

model modelName asm_gan parameter=value ...

Instance Definition

Name  d  g  s  b  [Tnode] ModelName parameter=value ...

Instance Parameters

1
l=0.25e-6
Channel Length.
2
w=200.0e-6
Channel Width.
3
nf=1
Number of fingers.
4
dfp1=50.0e-9
Distance of FP1 from 2-DEG Charge.
5
lfp1=1.0e-6
Length of FP1.
6
dfp2=100.0e-9
Distance of FP2 from 2-DEG Charge.
7
lfp2=1.0e-6
Length of FP2.
8
dfp3=150.0e-9
Distance of FP3 from 2-DEG Charge.
9
lfp3=1.0e-6
Length of FP3.
10
dfp4=200.0e-9
Distance of FP4 from 2-DEG Charge.
11
lfp4=1.0e-6
Length of FP4.
12
dtemp=0.0
Temperature variability parameter.
13
ngcon=1
Number of gate contacts.
14
m=1
Multiplicity factor.
15
trise=0.0
Alias of dtemp.
16
isnoisy=yes
Should device generate noise. Possible values are no and yes.

Model Parameters

1
version=101.0
The model parameter "version" only accepts a real number value, like 101.0 for version=101.0. The available versions now are 101.0, 101.1, 101.2 and 101.3.
2
tnom=27.0
Nominal Temperature in degree Celsius.
3
tbar=2.5e-8
Barrier layer thickness.
4
epsilon=10.66e-11
Dielectric Permittivity of AlGaN layer.
5
voff=(-2.0)
Cut-off voltage.
6
u0=170.0e-3
Low field mobility.
7
ua=0.0e-9
Mobility Degradation coefficient first order.
8
ub=0.0e-18
Mobility Degradation coefficient second order.
9
vsat=1.9e5
Saturation Velocity.
10
delta=2.0
Exponent for Vdeff.
11
at=0.0
Temperature Dependence for saturation velocity.
12
ute=(-0.5)
Temperature dependence of mobility.
13
lambda=0.0
Channel Length Modulation Coefficient.
14
eta0=1.0e-9
DIBL Parameter.
15
vdscale=5.0
DIBL Scaling VDS.
16
kt1=0.0e-3
Temperature Dependence for Voff.
17
thesat=1.0
Velocity Saturation Parameter.
18
nfactor=0.5
Sub-voff Slope parameters.
19
cdscd=1.0e-3
Sub-voff Slope Change due to Drain Voltage.
20
gamma0i=2.12e-12
Schrodinger-Poisson solution parameter.
21
gamma1i=3.73e-12
Schrodinger-Poisson solution parameter.
22
imin=1.0e-15
Minimum Drain Current.
23
shmod=1
Switch to turn on and off self-heating model.
24
rth0=5.0
Thermal Resistance.
25
cth0=1.0e-9
Thermal Capacitance.
26
rdsmod=0
Switch for external source and drain resistances.
27
vsataccs=50.0e3
Saturation Velocity for access region: Source Side.
28
ns0accs=5.0e17
2-DEG Charge Density in per square meter in Source access region.
29
ns0accd=5.0e17
2-DEG Charge Density in per square meter in Drain access region.
30
k0accs=0.0
Vg dependence parameter of source side access region 2-DEG charge density.
31
k0accd=0.0
Vg dependence parameter of drain side access region 2-DEG charge density.
32
u0accs=155e-3
Access region mobility source-side.
33
u0accd=155e-3
Access region mobility drain-side.
34
mexpaccs=2.0
Exponent for access region resistance model.
35
mexpaccd=2.0
Exponent for access region resistance model.
36
lsg=1.0e-6
Length of Source-Gate Access Region.
37
ldg=1.0e-6
Length of Drain-Gate Access Region or Length of drain side access region.
38
rsc=1.0e-4
Source Contact Resistance.
39
rdc=1.0e-4
Drain Contact Resistance.
40
kns0=0.0
Temperature Dependence for 2-DEG charge density at access region.
41
ats=0.0
Temperature Dependence for saturation velocity at access region.
42
utes=0.0
Temperature dependence of mobility at access region: Source Side.
43
uted=0.0
Temperature dependence of mobility at access region: Drain Side.
44
krsc=0.0
Temperature dependence of Source Contact Resistance.
45
krdc=0.0
Temperature dependence of Drain Contact Resistance.
46
gatemod=0
Model Switch to turn on and off the gate current formulations.
47
njgs=2.5
Gate-source junction diode current ideality factor.
48
njgd=2.5
Gate-drain junction diode current ideality factor.
49
rnjgs=80.0
Gate-source junction diode rev. current slope factor.
50
rnjgd=80.0
Gate-drain junction diode rev. current slope factor.
51
igsdio=1.0
Gate-source junction diode saturation current.
52
igddio=1.0
Gate-drain junction diode saturation current.
53
rigsdio=1.0e-15
Gate-source junction diode rev. current frenkel-poole multiplier.
54
rigddio=1.0e-15
Gate-drain junction diode  rev. current frenkel-poole multiplier.
55
vbis=1e-4
Gate-source junction diode built-in voltage.
56
vbid=1e-4
Gate-drain junction diode built-in voltage.
57
ebreaks=0.0
Fitting parameter for large rev bias gate current.
58
ebreakd=0.0
Fitting parameter for large rev bias gate current.
59
ktgs=0.0
Temperature co-efficient of gate-source junction diode current.
60
ktgd=0.0
Temperature coefficient of gate-drain junction diode current.
61
rktgs=0.0
Temperature co-efficient of reverse gate-source junction diode current.
62
rktgd=0.0
Temperature coefficient of reverse gate-drain junction diode current.
63
ktvbis=0.0
Temperature coefficient for built-in voltage source side.
64
ktvbid=0.0
Temperature coefficient for built-in voltage drain side.
65
ktnjgs=0.0
Temperature coefficient forward slope source-side.
66
ktnjgd=0.0
Temperature coefficient forward slope drain-side.
67
ktrnjgs=0.0
Temperature coefficient reverse slope source-side.
68
ktrnjgd=0.0
Temperature coefficient reverse slope drain-side.
69
trapmod=0
Model Switch to turn on and off the dynamic trapping effects.
70
remi=1.0
Drain lag emmission resistance.
71
cglag=10.0e-6
Gate lag trapping capacitance.
72
remig=1.0
Gate lag trapping resistance.
73
arcap=0.0
Drain lag trap potential tuning parameter.
74
brcap=0.5
Drain lag trap potential tuning parameter.
75
arcapg=0.0
Gate lag trap potential tuning parameter.
76
brcapg=0.5
Gate lag trap potential tuning parameter.
77
vdlmax=20.0
Drain lag parameter for limiting parameter change.
78
vglmax=5.0
Gate lag parameter for limiting parameter change.
79
dlvoff=0e-4
Voff tuning due to drain lag.
80
glvoff=0e-4
Voff tuning due to gate lag.
81
glu0=0e-4
U0 tuning due to drain lag.
82
glvsat=0e-4
VSAT tuning due to gate lag.
83
dlns0s=0e-4
Source-side 2-deg tune due to drain lag.
84
dlns0d=0e-4
Drain-side 2-deg tune due to gate-lag.
85
cdlag=1.0e-6
Trap Network capacitance.
86
rdlag=1.0e6
Trap Network resistance.
87
idio=1.0e0
Saturation Current parameter for trap model.
88
atrapvoff=0.1
Voff change due to trapping effects.
89
btrapvoff=0.3
Voff change with input power due to trapping effects.
90
atrapeta0=0
DIBL change due to trapping effects.
91
btrapeta0=0.05
DIBL change with input power due to trapping effects.
92
atraprs=0.1
Rs change due to trapping effects.
93
btraprs=0.6
Rs change with input power due to trapping effects.
94
atraprd=0.5
Rd change due to trapping effects.
95
btraprd=0.6
Rd change with input power due to trapping effects.
96
rtrap1=1.0
Trap Network1 Resistance.
97
rtrap2=1.0
Trap Network2 Resistance.
98
ctrap1=10.0e-6
Trap Network1 Capacitance.
99
ctrap2=1.0e-6
Trap Network2 Capacitance.
100
a1=0.1
Multiplication factor [1st network].
101
vofftr=1.0e-9
Trap contribution to voff [2nd network].
102
cdscdtr=1.0e-15
Trap contribution to cdscd [2nd network].
103
eta0tr=1.0e-15
Trap contribution to DIBL [2nd network].
104
rontr1=1.0e-12
Trap contribution to RON [1st network].
105
rontr2=1.0e-13
Trap contribution to RON [2nd network].
106
rontr3=1.0e-13
Trap contribution to RON.
107
rtrap3=1.0
Trap Network Resistance.
108
ctrap3=1.0e-4
Trap Network Capacitance.
109
vatrap=10.0
Division factor for V[trap1].
110
wd=0.016
Weak dependence of vdlr1 on Vdg.
111
vdlr1=2.0
Slope for region one.
112
vdlr2=20.0
Slope for region two.
113
talpha=1.0
Temperature dependence Coefficient.
114
vtb=250.0
Break Point for Vdg effect on Von.
115
deltax=0.01
Smoothing parameter.
116
fastfpmod=0
Fast field-plate model formulations [0:Conventional FP model; 1: Fast model calculations].
117
fp1mod=0
Field Plate Model Selector [0:No FP; 1:Gate FP; 2:Source FP;].
118
fp1smod=0
Source-side Field Plate Model Selector [0:No FP; 1:Gate FP; 2:Source FP;].
119
fp2mod=0
Drain-side Field Plate Model Selector [0:No FP; 1:Gate FP; 2:Source FP;].
120
fp2smod=0
Source-side Field Plate Model Selector [0:No FP; 1:Gate FP; 2:Source FP;].
121
fp3mod=0
Drain-side Field Plate Model Selector [0:No FP; 1:Gate FP; 2:Source FP;].
122
fp3smod=0
Source-side Field Plate Model Selector [0:No FP; 1:Gate FP; 2:Source FP;].
123
fp4mod=0
Drain-side Field Plate Model Selector [0:No FP; 1:Gate FP; 2:Source FP;].
124
fp4smod=0
Source-side Field Plate Model Selector [0:No FP; 1:Gate FP; 2:Source FP;].
125
iminfp1=1.0e-15
Minimum Drain Current FP1 region.
126
vofffp1=(-25.0)
voff for FP1.
127
ktfp1=50.0e-3
Temperature Dependence for vofffp1.
128
u0fp1=100e-3
FP1 region mobility.
129
vsatfp1=100e+3
Saturation Velocity of FP1 region.
130
nfactorfp1=0.5
Sub-voff Slope parameters for FP1.
131
cdscdfp1=0.0
Sub-voff Slope Change due to Drain Voltage for FP1.
132
eta0fp1=1.0e-9
DIBL Parameter for FP1.
133
vdscalefp1=10.0
DIBL Scaling VDS for FP1.
134
gamma0fp1=2.12e-12
Schrodinger-Poisson solution parameter for FP1.
135
gamma1fp1=3.73e-12
Schrodinger-Poisson solution parameter for FP1.
136
iminfp2=1.0e-15
Minimum Drain Current FP2 region.
137
vofffp2=(-50.0)
voff for FP2.
138
ktfp2=50.0e-3
Temperature Dependence for vofffp2.
139
u0fp2=100e-3
Carrier mobility of FP2 region.
140
vsatfp2=100e+3
Saturation velocity of FP2 region.
141
nfactorfp2=0.5
Sub-voff Slope parameters for FP2.
142
cdscdfp2=0.0
Sub-voff Slope Change due to Drain Voltage for FP2.
143
eta0fp2=1.0e-9
DIBL Parameter for FP2.
144
vdscalefp2=10.0
DIBL Scaling VDS for FP2.
145
gamma0fp2=2.12e-12
Schrodinger-Poisson solution parameter for FP2.
146
gamma1fp2=3.73e-12
Schrodinger-Poisson solution parameter for FP2.
147
iminfp3=1.0e-15
Minimum Drain Current FP3 region.
148
vofffp3=(-75.0)
voff for FP3.
149
ktfp3=50.0e-3
Temperature Dependence for vofffp3.
150
u0fp3=100e-3
FP3 region mobility.
151
vsatfp3=100e+3
Saturation Velocity of FP3 region.
152
nfactorfp3=0.5
Sub-voff Slope parameters for FP3.
153
cdscdfp3=0.0
Sub-voff Slope Change due to Drain Voltage for FP3.
154
eta0fp3=1.0e-9
DIBL Parameter for FP3.
155
vdscalefp3=10.0
DIBL Scaling VDS for FP3.
156
gamma0fp3=2.12e-12
Schrodinger-Poisson solution parameter for FP3.
157
gamma1fp3=3.73e-12
Schrodinger-Poisson solution parameter for FP3.
158
iminfp4=1.0e-15
Minimum Drain Current FP4 region.
159
vofffp4=(-100.0)
voff for FP4.
160
ktfp4=50.0e-3
Temperature Dependence for vofffp4.
161
u0fp4=100e-3
FP4 region mobility.
162
vsatfp4=100e+3
Saturation Velocity of FP4 region.
163
nfactorfp4=0.5
Sub-voff Slope parameters for FP4.
164
cdscdfp4=0.0
Sub-voff Slope Change due to Drain Voltage for FP4.
165
eta0fp4=1.0e-9
DIBL Parameter for FP4.
166
vdscalefp4=10.0
DIBL Scaling VDS for FP4.
167
gamma0fp4=2.12e-12
Schrodinger-Poisson solution parameter for FP4.
168
gamma1fp4=3.73e-12
Schrodinger-Poisson solution parameter for FP4.
169
cgso=0.0e-18
Gate-source overlap capacitance.
170
cgdo=0.0e-18
Gate-drain overlap capacitance.
171
cdso=0.0e-18
Cds capacitance parameter.
172
cgdl=0.0e-15
Vds bias dependence of parasitic gate drain overlap capacitance.
173
vdsatcv=100.0
Saturation voltage on drain side in CV Model.
174
cbdo=0.0e-15
Substrate capacitance parameter.
175
cbso=0.0e-15
Substrate capacitance parameter.
176
cbgo=0.0e-15
Substrate capacitance parameter.
177
cfg=0.0e-18
Fringing capacitance parameter.
178
cfd=0.0e-18
Fringing capacitance parameter.
179
cfgd=0.0e-13
Fringing capacitance parameter.
180
cfgdsm=1.0e-24
Capacitance smoothing parameter.
181
cfgd0=0.0e-12
Fringing capacitance parameter.
182
cj0=0.0e-15
Zero bias depletion capacitance.
183
vbi=0.9
Built in potential.
184
ktvbi=0.0
Temperature dependence of built in potential.
185
ktcfg=0.0e-3
Temperature dependence of Fringing capacitance.
186
ktcfgd=0.0e-3
Temperature dependence of Fringing capacitance.
187
mz=0.5
Grading factor of depletion capacitance.
188
aj=100.0e-3
Limiting factor of depletion capacitance in forward bias region.
189
dj=1.0
Fitting parameter.
190
adosi=0.0
Quantum mechanical effect pre-factor cum switch in inversion.
191
bdosi=1.0
Charge centroid parameter - slope of CV curve under QME in inversion.
192
qm0i=1.0e-3
Charge centroid parameter - starting point for QME in inversion.
193
adosfp1=0.0
Quantum mechanical effect pre-factor cum switch in inversion.
194
bdosfp1=1.0
Charge centroid parameter - slope of CV curve under QME in inversion.
195
qm0fp1=1.0e-3
Charge centroid parameter - starting point for QME in inversion.
196
adosfp2=0.0
Quantum mechanical effect pre-factor cum switch in inversion.
197
bdosfp2=1.0
Charge centroid parameter - slope of CV curve under QME in inversion.
198
qm0fp2=1.0e-3
Charge centroid parameter - starting point for QME in inversion.
199
adosfp3=0.0
Quantum mechanical effect pre-factor cum switch in inversion.
200
bdosfp3=1.0
Charge centroid parameter - slope of CV curve under QME in inversion.
201
qm0fp3=1.0e-3
Charge centroid parameter - starting point for QME in inversion.
202
adosfp4=0.0
Quantum mechanical effect pre-factor cum switch in inversion.
203
bdosfp4=1.0
Charge centroid parameter - slope of CV curve under QME in inversion.
204
qm0fp4=1.0e-3
Charge centroid parameter - starting point for QME in inversion.
205
cfp1scale=0.0
Coupling of charge under FP1.
206
cfp2scale=0.0
Coupling of charge under FP2.
207
cfp3scale=0.0
Coupling of charge under FP3.
208
cfp4scale=0.0
Coupling of charge under FP4.
209
csubscalei=0.0
Sub Capacitance scaling parameter.
210
csubscale1=0.0
Sub Capacitance scaling parameter.
211
csubscale2=0.0
Sub Capacitance scaling parameter.
212
csubscale3=0.0
Sub Capacitance scaling parameter.
213
csubscale4=0.0
Sub Capacitance scaling parameter.
214
rgatemod=0
Model Switch to turn on and off the gate resistance.
215
xgw=0.0
Distance from gate contact centre to dev edge.
216
rshg=1.0e-3
Gate sheet resistance.
217
fnmod=0
Switch to turn Flicker Noise Model  ON [fnmod=1] or OFF [fnmod=0].
218
tnmod=0
Switch to turn Thermal Noise Model  ON [tnmod=1] or OFF [tnmod=0].
219
noia=15.0e-12
Flicker Noise parameter.
220
noib=0.0
Flicker Noise parameter.
221
noic=0.0
Flicker Noise parameter.
222
ef=1
Exponent of frequency---Determines slope in log plot.
223
tnsc=1.0e27
Thermal noise scaling parameter.
224
gdsmin=1.0e-12
Shunt conduntance across channel and all field plates.
225
bvdsl=200.0
Drain-source breakdown due to punch-through.
226
asl=0.0
Breakdown model multiplier parameter.
227
nsl=10.0
Exponent in the breakdown model.
228
kasl=0.0
Temperature Dependence for asl parameters in breakdown.
229
knsl=0.0
Temperature Dependence for nsl parameters in breakdown.
230
kbvdsl=0.0
Temperature Dependence for bvdsl parameters in breakdown.
231
ngcon=1
Number of gate contacts.
232
dfp1=50.0e-9
Distance of FP1 from 2-DEG Charge.
233
lfp1=1.0e-6
Length of FP1.
234
dfp2=100.0e-9
Distance of FP2 from 2-DEG Charge.
235
lfp2=1.0e-6
Length of FP2.
236
dfp3=150.0e-9
Distance of FP3 from 2-DEG Charge.
237
lfp3=1.0e-6
Length of FP3.
238
dfp4=200.0e-9
Distance of FP4 from 2-DEG Charge.
239
lfp4=1.0e-6
Length of FP4.
240
trise=0.0 C
Temperature rise from ambient, alias of dtemp. It served as the default value of instance trise .

Output Parameters

1

tempeff

Effective temperature without selfheating temperature.

2

meff

Effective multiplicity factor (m-factor).

Operating-Point Parameters

1
trise=0.0
Alias of dtemp.
2
idisi (A)
Intrinsic drain-to-source current.
3
vdisi (V)
Intrinsic drain-to-source voltage.
4
vgisi (V)
Intrinsic drain-to-source voltage.
5
gmi (A/V)
Intrinsic trans-conductance.
6
gdsi (A/V)
Intrinsic output conductance.
7
gmbi (A/V)
Intrinsic bulk trans-conductance.
8
igs (A)
Gate to source current.
9
igd (A)
Gate to source current.
10
qgi (C)
Intrinsic gate charge.
11
qdi (C)
Intrinsic drain charge.
12
qsi (C)
Intrinsic source charge.
13
qbi (C)
Intrinsic bulk charge.
14
cggi (F)
Intrinsic gate capacitance.
15
cgsi (F)
Intrinsic gate-to-source capacitance.
16
cgdi (F)
Intrinsic gate-to-drain capacitance.
17
cgbi (F)
Intrinsic gate-to-bulk capacitance.
18
cddi (F)
Intrinsic drain capacitance.
19
cdgi (F)
Intrinsic drain-to-gate capacitance.
20
cdsi (F)
Intrinsic drain-to-source capacitance.
21
cdbi (F)
Intrinsic drain-to-bulk capacitance.
22
cssi (F)
Intrinsic source capacitance.
23
csgi (F)
Intrinsic source-to-gate capacitance.
24
csdi (F)
Intrinsic source-to-drain capacitance.
25
csbi (F)
Intrinsic source-to-bulk capacitance.
26
cbbi (F)
Intrinsic bulk capacitance.
27
cbsi (F)
Intrinsic bulk-to-source capacitance.
28
cbdi (F)
Intrinsic bulk-to-drain capacitance.
29
cbgi (F)
Intrinsic bulk-to-gate capacitance.
30
t_total_k (K)
Device temperature in Kelvin.
31
t_total_c (deg C)
Device temperature in Celsius.
32
t_delta_sh (K)
Increase in device temperature due to self-heating.
33
rd (Ohm)
Drain resistance.
34
rs (Ohm)
Source resistance.
35
cgs (F)
Total gate-to-source capacitance.
36
cgd (F)
Total gate-to-drain capacitance.
37
pwr (W)
Power at op point.


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