BJT_Model:Bipolar Transistor Model
The Spectre bjt model is translated to the ADS NPN or PNP BJT_Model. For translation information on the BJT device, refer to BJT Device.
For more information on the ADS model, place the model in a schematic and choose Edit > Component > Edit Component Parameters to view the model parameters. You can also click Help in the component editor dialog box for additional information.
Example Spectre Command Line:
- model npn_mod bjt type=npn is=10e-13 bf=200 va=58.8 ikf=5.63e-3 rb=700 rbm=86 re=3.2 cje=0.352e-12 pe=0.76 me=0.34 tf=249e-12 cjc=0.34e-12 pc=0.55
Spectre Netlist Syntax:
- model mname bjt type=[npn|pnp] [param=value]*
ADS Netlist Syntax:
- model mname BJT NPN=[0|1] PNP=[0|1] [param=value]*
ADS Schematic Symbol:
Model Parameters:
For information on parameter format, refer to Using Parameter Mapping Tables to Understand a Translation.
Table 8-5. BJT_Model Parameter Mapping
|
|
|
|
|
|
NPN 
|
|
yes
|
type
|
|
npn
|
PNP
|
|
no
|
type
|
|
npn
|
Is
|
A
|
1.0E-16
|
is
|
A
|
1.0E-16
|
Bf
|
A/A
|
100
|
bf
|
A/A
|
100
|
Nf
|
|
1.0
|
nf
|
|
1.0
|
Vaf
|
V
|
infinity
|
vaf
|
V
|
infinity
|
Ikf
|
A
|
infinity
|
ikf
|
A
|
infinity
|
Ise
|
A
|
0.0
|
ise
|
A
|
0.0
|
Ne
|
|
1.5
|
ne
|
|
1.5
|
Br
|
A/A
|
1.0
|
br
|
A/A
|
1.0
|
Nr
|
|
1.0
|
nr
|
|
1.0
|
Var
|
V
|
infinity
|
var
|
V
|
infinity
|
Ikr
|
A
|
infinity
|
ikr
|
A
|
infinity
|
Isc
|
A
|
0.0
|
isc
|
A
|
0.0
|
Nc
|
|
2.0
|
nc
|
|
2.0
|
Rb
|
Ohms
|
0.0
|
rb
|
Ohms
|
0.0
|
Irb
|
A
|
infinity
|
irb
|
A
|
infinity
|
Rbm
|
Ohms
|
0.0
|
rbm
|
Ohms
|
rb
|
Re
|
Ohms
|
0.0
|
re
|
Ohms
|
0.0
|
Rc
|
Ohms
|
0.0
|
rc
|
Ohms
|
0.0
|
Imax
|
A
|
|
imax
|
A
|
1000
|
Cje
|
F
|
0.0
|
cje
|
F
|
0.0
|
Vje
|
V
|
0.75
|
vje
|
V
|
0.75
|
Mje
|
|
1/3
|
mje
|
|
1/3
|
Cjc
|
F
|
0.0
|
cjc
|
F
|
0.0
|
Vjc
|
V
|
0.75
|
vjc
|
V
|
0.75
|
Mjc
|
|
1/3
|
mjc
|
|
1/3
|
Xcjc
|
|
1.0
|
xcjc
|
|
1.0
|
Cjs
|
F
|
0.0
|
cjs
|
F
|
0.0
|
Vjs
|
V
|
0.75
|
vjs
|
V
|
0.75
|
Mjs
|
|
0.0
|
mjs
|
|
0.0
|
Fc
|
|
0.5
|
fc
|
|
0.5
|
Tf
|
sec
|
0.0
|
tf
|
sec
|
0.0
|
Xtf
|
|
0.0
|
xtf
|
|
0.0
|
Vtf
|
V
|
infinity
|
vtf
|
V
|
infinity
|
Itf
|
A
|
0.0
|
itf
|
A
|
0.0
|
Ptf
|
degrees
|
0.0
|
ptf
|
degrees
|
0.0
|
Tr
|
sec
|
0.0
|
tr
|
sec
|
0.0
|
Kf
|
|
0.0
|
kf
|
|
0.0
|
Af
|
|
1.0
|
af
|
|
1.0
|
Kb
|
|
0.0
|
kb
|
|
0.0
|
Fb
|
Hz
|
1.0
|
bnoisefc
|
Hz
|
1.0
|
Iss
|
A
|
0.0
|
iss
|
A
|
0.0
|
Ns
|
|
1.0
|
ns
|
|
1.0
|
Lateral
|
|
for struct = vertical, default = no
for struct = lateral, default = yes
|
struct
|
|
for type = npn, default = vertical
for type = pnp, default = lateral
|
RbModel\ 80
|
|
MDS
|
rbmod
|
|
spice
|
Tnom
|
°C
|
|
tnom
|
°C
|
Set by options
|
Tlev
|
|
0
|
tlev
|
|
0
|
Tlevc
|
|
0
|
tlevc
|
|
0
|
Eg
|
eV
|
1.11
|
eg
|
eV
|
1.11
|
EgAlpha
|
V/°C
|
7.04E-4
|
gap1
|
V/°C
|
7.02E-4
|
EgBeta
|
K
|
|
gap2
|
°C
|
1108
|
Tbf1
|
1/°C
|
0.0
|
tbf1
|
1/°C
|
0.0
|
Tbf2
|
1/°C2
|
0.0
|
tbf2
|
1/°C2
|
0.0
|
Tbr1
|
1/°C
|
0.0
|
tbr1
|
1/°C
|
0.0
|
Tbr2
|
1/°C2
|
0.0
|
tbr2
|
1/°C2
|
0.0
|
Tcbc
|
1/°C
|
0.0
|
ctc
|
1/°C
|
0.0
|
Tcbe
|
1/°C
|
0.0
|
cte
|
1/°C
|
0.0
|
Tccs
|
1/°C
|
0.0
|
cts
|
1/°C
|
0.0
|
Tikf1
|
1/°C
|
0.0
|
tikf1
|
1/°C
|
0.0
|
Tikf2
|
1/°C2
|
0.0
|
tikf2
|
1/°C2
|
0.0
|
Tikr1
|
1/°C
|
0.0
|
tikr1
|
1/°C
|
0.0
|
Tikr2
|
1/°C2
|
0.0
|
tikr2
|
1/°C2
|
0.0
|
Tirb1
|
1/°C
|
0.0
|
tirb1
|
1/°C
|
0.0
|
Tirb2
|
1/°C2
|
0.0
|
tirb2
|
1/°C2
|
0.0
|
Tis1
|
1/°C
|
0.0
|
tis1
|
1/°C
|
0.0
|
Tis2
|
1/°C2
|
0.0
|
tis2
|
1/°C2
|
0.0
|
Tisc1
|
1/°C
|
0.0
|
tisc1
|
1/°C
|
0.0
|
Tisc2
|
1/°C2
|
0.0
|
tisc2
|
1/°C2
|
0.0
|
Tise1
|
1/°C
|
0.0
|
tise1
|
1/°C
|
0.0
|
Tise2
|
1/°C2
|
0.0
|
tise2
|
1/°C2
|
0.0
|
Tiss1
|
1/°C
|
0.0
|
tiss1
|
1/°C
|
0.0
|
Tiss2
|
1/°C2
|
0.0
|
tiss2
|
1/°C2
|
0.0
|
Titf1
|
1/°C
|
0.0
|
titf1
|
1/°C
|
0.0
|
Titf2
|
1/°C2
|
0.0
|
titf2
|
1/°C2
|
0.0
|
Tmjc1
|
1/°C
|
0.0
|
tmjc1
|
1/°C
|
0.0
|
Tmjc2
|
1/°C2
|
0.0
|
tmjc2
|
1/°C2
|
0.0
|
Tmje1
|
1/°C
|
0.0
|
tmje1
|
1/°C
|
0.0
|
Tmje2
|
1/°C2
|
0.0
|
tmje2
|
1/°C2
|
0.0
|
Tmjs1
|
1/°C
|
0.0
|
tmjs1
|
1/°C
|
0.0
|
Tmjs2
|
1/°C2
|
0.0
|
tmjs2
|
1/°C2
|
0.0
|
Tnc1
|
1/°C
|
0.0
|
tnc1
|
1/°C
|
0.0
|
Tnc2
|
1/°C2
|
0.0
|
tnc2
|
1/°C2
|
0.0
|
Tne1
|
1/°C
|
0.0
|
tne1
|
1/°C
|
0.0
|
Tne2
|
1/°C2
|
0.0
|
tne2
|
1/°C2
|
0.0
|
Tnf1
|
1/°C
|
0.0
|
tnf1
|
1/°C
|
0.0
|
Tnf2
|
1/°C2
|
0.0
|
tnf2
|
1/°C2
|
0.0
|
Tnr1
|
1/°C
|
0.0
|
tnr1
|
1/°C
|
0.0
|
Tnr2
|
1/°C2
|
0.0
|
tnr2
|
1/°C2
|
0.0
|
Tns1
|
1/°C
|
0.0
|
tns1
|
1/°C
|
0.0
|
Tns2
|
1/°C2
|
0.0
|
tns2
|
1/°C2
|
0.0
|
Trb1
|
1/°C
|
0.0
|
trb1
|
1/°C
|
0.0
|
Trb2
|
1/°C2
|
0.0
|
trb2
|
1/°C2
|
0.0
|
Trc1
|
1/°C
|
0.0
|
trc1
|
1/°C
|
0.0
|
Trc2
|
1/°C2
|
0.0
|
trc2
|
1/°C2
|
0.0
|
Tre1
|
1/°C
|
0.0
|
tre1
|
1/°C
|
0.0
|
Tre2
|
1/°C2
|
0.0
|
tre2
|
1/°C2
|
0.0
|
Trm1
|
1/°C
|
0.0
|
trm1
|
1/°C
|
0.0
|
Trm2
|
1/°C2
|
0.0
|
trm2
|
1/°C2
|
0.0
|
Ttf1
|
1/°C
|
0.0
|
ttf1
|
1/°C
|
0.0
|
Ttf2
|
1/°C2
|
0.0
|
ttf2
|
1/°C2
|
0.0
|
Ttr1
|
1/°C
|
0.0
|
ttr1
|
1/°C
|
0.0
|
Ttr2
|
1/°C2
|
0.0
|
ttr2
|
1/°C2
|
0.0
|
Tvaf1
|
1/°C
|
0.0
|
tvaf1
|
1/°C
|
0.0
|
Tvaf2
|
1/°C2
|
0.0
|
tvaf2
|
1/°C2
|
0.0
|
Tvar1
|
1/°C
|
0.0
|
tvar1
|
1/°C
|
0.0
|
Tvar2
|
1/°C2
|
0.0
|
tvar2
|
1/°C2
|
0.0
|
Tvjc
|
1/°C
|
0.0
|
tvjc
|
1/°C
|
0.0
|
Tvje
|
1/°C
|
0.0
|
tvje
|
1/°C
|
0.0
|
Tvjs
|
1/°C
|
0.0
|
tvjs
|
1/°C
|
0.0
|
Xtb
|
|
0.0
|
xtb
|
|
0.0
|
Xti
|
|
3.0
|
xti
|
|
3.0
|
wVsubfwd
|
V
|
infinity
|
vsubfwd
|
V
|
0.2
|
wBvsub
|
V
|
infinity
|
bvsub
|
V
|
infinity
|
wBvbe
|
V
|
infinity
|
bvbe
|
V
|
infinity
|
wBvbc
|
V
|
infinity
|
bvbc
|
V
|
infinity
|
wVbcfwd
|
V
|
infinity
|
vbcfwd
|
V
|
0.2
|
wIbmax
|
A
|
infinity
|
imax
|
A
|
1E3
|
wIcmax
|
A
|
infinity
|
imax1
|
A
|
imax
|
Parameters not in Spectre Model
|
|
|
|
Ab
|
|
1.0
|
|
|
|
Secured
|
|
|
|
|
|
Nk
|
|
0.5
|
|
|
|
Ffe
|
|
1.0
|
|
|
|
Approxqb
|
|
yes
|
|
|
|
wPmax
|
W
|
infinity
|
|
|
|
Null
|
|
|
|
|
|
Temp
|
°C
|
25
|
|
|
|
|
|
|
Parameters not in ADS Model
|
|
|
|
c2
|
|
0.0
|
|
|
|
c4
|
|
0.0
|
|
|
|
cb0
|
A
|
0.0
|
|
|
|
gb0
|
Siemens
|
0.0
|
|
|
|
vb0
|
V
|
0.0
|
|
|
|
ke
|
1/V
|
0.0
|
|
|
|
kc
|
1/V
|
0.0
|
|
|
|
dope
|
cm3
|
1E15
|
|
|
|
cex
|
|
1.0
|
|
|
|
cco
|
A
|
1.0
|
|
|
|
rvc
|
Ohm
|
0.0
|
|
|
|
rcm
|
Ohm
|
0.0
|
|
|
|
minr
|
Ohm
|
0.1
|
|
|
|
rbnoi
|
Ohm
|
rb
|
|
|
|
xcjc2
|
|
1.0
|
|
|
|
td
|
sec
|
0.0
|
|
|
|
tvtf1
|
1/°C
|
0.0
|
|
|
|
tvtf2
|
1/°C2
|
0.0
|
|
|
|
txtf1
|
1/°C
|
0.0
|
|
|
|
txtf2
|
1/°C2
|
0.0
|
|
|
|
trise
|
°C
|
0.0
|
|
|
|
dskip
|
|
yes
|
|
|
|
alarm
|
|
none
|
|
|
|
imelt
|
A
|
imax
|
|
|
|
bvce
|
V
|
infinity
|
|
|
|
vbefwd
|
V
|
0.2
|
|
