Gummel-Poon BJT Parameters (incl. model extensions)
Name
Parameters
Units
Default
Example
Scale factor
SUBS
Substrate connection: for vertical geometry, -1 for lateral geometry (level 2 only).
1
IS
Transport saturation current.
A
1.0e-16
1.0e-15
area
ISS
Reverse saturation current, substrate-to-collector for vertical device or substrate-to-base for lateral (level 2 only).
A
1.0e-16
1.0e-15
area
BF
Ideal maximum forward beta.
-
100
100
NF
Forward current emission coefficient.
-
1.0
1
VAF (VA)
Forward Early voltage.
V
∞
200
IKF
Corner for forward beta current roll-off.
A
∞
0.01
area
NKF
High current Beta rolloff exponent
-
0.5
0.58
ISE
B-E leakage saturation current.
A
0.0
1e-13
area
NE
B-E leakage emission coefficient.
-
1.5
2
BR
Ideal maximum reverse beta.
-
1
0.1
NR
Reverse current emission coefficient.
-
1
1
VAR (VB)
Reverse Early voltage.
V
∞
200
IKR
Corner for reverse beta high current roll-off.
A
∞
0.01
area
ISC
B-C leakage saturation current (area is `areab' for vertical devices and `areac' for lateral).
A
0.0
1e-13
area
NC
B-C leakage emission coefficient.
-
2
1.5
RB
Zero bias base resistance.
Ω
0
100
area
IRB
Current where base resistance falls halfway to its min value.
A
∞
0.1
area
RBM
Minimum base resistance at high currents.
Ω
RB
10
area
RE
Emitter resistance.
Ω
0
1
area
RC
Collector resistance.
Ω
0
10
area
CJE
B-E zero-bias depletion capacitance.
F
0
2pF
area
VJE (PE)
B-E built-in potential.
V
0.75
0.6
MJE (ME)
B-E junction exponential factor.
-
0.33
0.33
TF
Ideal forward transit time.
sec
0
0.1ns
XTF
Coefficient for bias dependence of TF.
-
0
VTF
Voltage describing VBC dependence of TF.
V
∞
ITF
High-current parameter for effect on TF.
A
0
-
area
PTF
Excess phase at freq=$\frac{1}{2\pi TF}$ Hz.
deg
0
CJC
B-C zero-bias depletion capacitance (area is `areab' for vertical devices and `areac' for lateral).
F
0
2pF
area
VJC (PC)
B-C built-in potential.
V
0.75
0.5
MJC
B-C junction exponential factor.
-
0.33
0.5
XCJC
Fraction of B-C depletion capacitance connected to internal base node.
-
1
TR
Ideal reverse transit time.
sec
0
10ns
CJS
Zero-bias collector-substrate capacitance (area is `areac' for vertical devices and `areab' for lateral).
F
0
2pF
area
VJS (PS)
Substrate junction built-in potential.
V
0.75
MJS (MS)
Substrate junction exponential factor.
-
0
0.5
XTB
Forward and reverse beta temperature exponent.
-
0
EG
Energy gap for temperature effect on IS.
eV
1.11
XTI
Temperature exponent for effect on IS.
-
3
KF
Flicker-noise coefficient.
-
0
AF
Flicker-noise exponent.
-
1
FC
Coefficient for forward-bias depletion capacitance formula.
-
0.5
0
TNOM (TREF)
Parameter measurement temperature.
C
27
50
TLEV
BJT temperature equation selector
-
0
TLEVC
BJT capac. temperature equation selector
-
0
TRE1
1st order temperature coefficient for RE.
$\frac{1}{C}$
0.0
1e-3
TRE2
2nd order temperature coefficient for RE.
$\frac{1}{C^{2}}$
0.0
1e-5
TRC1
1st order temperature coefficient for RC .
$\frac{1}{C}$
0.0
1e-3
TRC2
2nd order temperature coefficient for RC.
$\frac{1}{C^{2}}$
0.0
1e-5
TRB1
1st order temperature coefficient for RB.
$\frac{1}{C}$
0.0
1e-3
TRB2
2nd order temperature coefficient for RB.
$\frac{1}{C^{2}}$
0.0
1e-5
TRBM1
1st order temperature coefficient for RBM
$\frac{1}{C}$
0.0
1e-3
TRBM2
2nd order temperature coefficient for RBM
$\frac{1}{C^{2}}$
0.0
1e-5
TBF1
1st order temperature coefficient for BF
$\frac{1}{C}$
0.0
1e-3
TBF2
2nd order temperature coefficient for BF
$\frac{1}{C^{2}}$
0.0
1e-5
TBR1
1st order temperature coefficient for BR
$\frac{1}{C}$
0.0
1e-3
TBR2
2nd order temperature coefficient for BR
$\frac{1}{C^{2}}$
0.0
1e-5
TIKF1
1st order temperature coefficient for IKF
$\frac{1}{C}$
0.0
1e-3
TIKF2
2nd order temperature coefficient for IKF
$\frac{1}{C^{2}}$
0.0
1e-5
TIKR1
1st order temperature coefficient for IKR
$\frac{1}{C}$
0.0
1e-3
TIKR2
2nd order temperature coefficient for IKR
$\frac{1}{C^{2}}$
0.0
1e-5
TIRB1
1st order temperature coefficient for IRB
$\frac{1}{C}$
0.0
1e-3
TIRB2
2nd order temperature coefficient for IRB
$\frac{1}{C^{2}}$
0.0
1e-5
TNC1
1st order temperature coefficient for NC
$\frac{1}{C}$
0.0
1e-3
TNC2
2nd order temperature coefficient for NC
$\frac{1}{C^{2}}$
0.0
1e-5
TNE1
1st order temperature coefficient for NE
$\frac{1}{C}$
0.0
1e-3
TNE2
2nd order temperature coefficient for NE
$\frac{1}{C^{2}}$
0.0
1e-5
TNF1
1st order temperature coefficient for NF
$\frac{1}{C}$
0.0
1e-3
TNF2
2nd order temperature coefficient for NF
$\frac{1}{C^{2}}$
0.0
1e-5
TNR1
1st order temperature coefficient for IKF
$\frac{1}{C}$
0.0
1e-3
TNR2
2nd order temperature coefficient for IKF
$\frac{1}{C^{2}}$
0.0
1e-5
TVAF1
1st order temperature coefficient for VAF
$\frac{1}{C}$
0.0
1e-3
TVAF2
2nd order temperature coefficient for VAF
$\frac{1}{C^{2}}$
0.0
1e-5
TVAR1
1st order temperature coefficient for VAR
$\frac{1}{C}$
0.0
1e-3
TVAR2
2nd order temperature coefficient for VAR
$\frac{1}{C^{2}}$
0.0
1e-5
CTC
1st order temperature coefficient for CJC
$\frac{1}{C}$
0.0
1e-3
CTE
1st order temperature coefficient for CJE
$\frac{1}{C}$
0.0
1e-3
CTS
1st order temperature coefficient for CJS
$\frac{1}{C}$
0.0
1e-3
TVJC
1st order temperature coefficient for VJC
$\frac{1}{C^{2}}$
0.0
1e-5
TVJE
1st order temperature coefficient for VJE
$\frac{1}{C}$
0.0
1e-3
TITF1
1st order temperature coefficient for ITF
$\frac{1}{C}$
0.0
1e-3
TITF2
2nd order temperature coefficient for ITF
$\frac{1}{C^{2}}$
0.0
1e-5
TTF1
1st order temperature coefficient for TF
$\frac{1}{C}$
0.0
1e-3
TTF2
2nd order temperature coefficient for TF
$\frac{1}{C^{2}}$
0.0
1e-5
TTR1
1st order temperature coefficient for TR
$\frac{1}{C}$
0.0
1e-3
TTR2
2nd order temperature coefficient for TR
$\frac{1}{C^{2}}$
0.0
1e-5
TMJE1
1st order temperature coefficient for MJE
$\frac{1}{C}$
0.0
1e-3
TMJE2
2nd order temperature coefficient for MJE
$\frac{1}{C^{2}}$
0.0
1e-5
TMJC1
1st order temperature coefficient for MJC
$\frac{1}{C}$
0.0
1e-3
TMJC2
2nd order temperature coefficient for MJC
$\frac{1}{C^{2}}$
0.0
1e-5