eCircuit Center SPICE Summary
About SPICE |
SPICE Basics |
Running SPICE |
CIRCUIT COLLECTION
SPICE Commands |
SPICE Downloads |
About |
Contact |
Home
Here's a brief reference of the SPICE devices and statements. Parameters enclosed by braces { } are required, while, those in brackets [ ] are optional. Parameters followed by an asterisk { }* should be repeated as necessary. Each SPICE vendor may have other parameters or commands unique to their version of SPICE. (For more information see Books on SPICE)
C device - Capacitor.
C{name} {+node} {-node} [{model}] {value} [IC={initial}]
Examples:
CLOAD 15 0 20pF
CFDBK 3 33 CMOD 10pF IC=1.5v
D device - Diode.
D{name} {+node} {-node} {model} [area]
Examples:
DCLAMP 14 0 DMOD
I device - Current Source.
I{name} {+node} {-node} [[DC] {value}] [AC {mag} [{phase}]]
Examples:
IBIAS 13 0 2.3mA
IAC 2 3 AC .001
IPULSE 1 0 PULSE(-1mA 1mA 2ns 2ns 2ns 50ns 100ns)
I3 26 77 AC 1 SIN(.002 .002 1.5MEG)
See Input Sources for PULSE, SIN and more.
Top ↑
J device - Junction FET.
J{name} {d} {g} {s} {model} [{area]}
Examples:
JIN 100 1 0 JFAST
K device - Inductor Coupling.
K{name} L{name} { L{name} }* {coupling}
Examples:
KTUNED L3OUT L4IN .8
KXFR1 LPRIM LSEC .99
L device - Inductor.
L{name} {+node} {-node} [model] {value} [IC={initial}]
Examples:
LLOAD 15 0 20mH
L2 1 2 .2e-6
LSENSE 5 12 2uH IC=2mA
M device - MOSFET.
M{name} {d} {g} {s} {sub} {mdl} [L={value}] [W={value}]
+ [AD={value}] [AS={value}]
+ [PD={value}] [PS={value}]
+ [NRD={value}] [NRS={value}]
Examples:
M1 14 2 13 0 PNOM L=25u W=12u
M13 15 3 0 0 PSTRONG
Q device - Bipolar Transistor.
Q{name} {c} {b} {e} [{subs}] {model} [{area}]
Examples:
Q1 14 2 13 PNPNOM
Q13 15 3 0 1 NPNSTRONG 1.5
R device - Resistor.
R{name} {+node} {-node} [{model}] {value}
Examples:
RLOAD 15 0 2k
S device - Voltage-Controlled Switch.
S{name} {+node} {-node} {+control} {-control} {model}
Examples:
S12 13 17 2 0 SMOD
T device - Transmission Line.
T{name} {A+} {A-} {B+} {B-} Z0={value}
[TD={val} | F={val}[NL={val}]]
Examples:
T1 1 2 3 4 Z0=220 TD=115ns
T2 1 2 3 4 Z0=50 F=5MEG NL=0.5
V device - Voltage Source.
V{name} {+node} {-node} [[DC] {value}] [AC {mag} [{phase}]]
Examples:
VBIAS 13 0 2.3mV
VAC 2 3 AC .001
VPULSE 1 0 PULSE(-1mV 1mV 2ns 2ns 2ns 50ns 100ns)
V3 26 77 AC 1 SIN(.002 .002 1.5MEG)
See Input Sources for PULSE, SIN and more. X device - Subcircuit Call. X{name} [{node}]* {subcircuit name} Examples: X12 100 101 200 201 DIFFAMP
Top ↑
CONTROLLED SOURCES
E device - Voltage Controlled Voltage Source VCVS.
E{name} {+node} {-node} {+cntrl} {-cntrl} {gain}
E{name} {+node} {-node} POLY({value}) {{+cntrl} {-cntrl}}* {{coeff}}*
Examples:
EBUFF 1 2 10 11 1.0
EAMP 13 0 POLY(1) 26 0 500
F device - Current Controlled Current Source CCCS.
F{name} {+node} {-node} {vsource name} {gain}
Examples:
FSENSE 1 2 VSENSE 10.0
G device - Voltage Controlled Current Source VCCS.
G{name} {+node} {-node} {+control} {-control} {gain}
Examples:
GBUFF 1 2 10 11 1.0
H device - Current Controlled Voltage Source CCVS.
H{name} {+node} {-node} {vsource name} {gain}
H{name} {+node} {-node} POLY({value}) { {vsource name} }* {{coeff}}*
Examples:
HSENSE 1 2 VSENSE 10.0
HAMP 13 0 POLY(1) VIN 500
Top ↑
INPUT SOURCES
EXPONENTIAL
EXP( {v1} {v2} {trise_delay} {tau_rise} {tfall_delay} {tau_fall) )
PULSE
PULSE( {v1} {v2} {tdelay} {trise} {tfall} {width} {period} )
PIECE WISE LINEAR
PWL( {time1} {v1} {time2} {v2} ... {time3} {v3} )
SINGLE FREQUENCY FM
SFFM( {voffset} {vpeak} {fcarrier} {mod_index} {fsignal} )
SINE WAVE
SIN( {voffset} {vpeak} {freq} {tdelay} {damp_factor} {phase} )
Top ↑
ANALOG BEHAVIORAL MODELING
VALUE
E|G{name} {+node} {-node} VALUE {expression}
Examples:
GMULT 1 0 VALUE = { V(3)*V(5,6)*100 }
ERES 1 3 VALUE = { I(VSENSE)*10K }
TABLE
E|G{name} {+node} {-node} TABLE {expression} = (invalue, outvalue)*
Examples:
ECOMP 3 0 TABLE {V(1,2)} = (-1MV 0V) (1MV, 10V)
LAPLACE
E|G{name} {+node} {-node} LAPLACE {expression} {s expression}
Examples:
ELOPASS 4 0 LAPLACE {V(1)} {10 / (s/6800 + 1)}
FREQ
E|G{name} {+node} {-node} FREQ {expression} (freq, gain, phase)*
Examples:
EAMP 5 0 FREQ {V(1)} (1KZ, 10DB, 0DEG) (10KHZ, 0DB, -90DEG)
.AC - AC Analysis.
.AC [LIN][OCT][DEC] {points} {start} {end}
Examples:
.AC LIN 101 10Hz 200Hz
.AC DEC 20 1MEG 100MEG
.DC - DC Analysis.
.DC [LIN] {varname} {start} {end} {incr}
.DC [OCT][DEC] {varname} {start} {end} {points}
Examples:
.DC VIN -.25 .25 .05
.DC LIN I2 5mA -2mA 0.1mA VCE 10V 15V 1V
.FOUR - Fourier Analysis.
.FOUR {freq} {output var}*
Examples:
.FOUR 10KHz v(5) v(6,7)
.IC - Initial Transient Conditions.
.IC { {vnode} = {value} }*
Examples:
.IC V(2)=3.4 V(102)=0
.MODEL – Device Model.
.MODEL {name} {type}
Typename Devname Devtype
CAP Cxxx capacitor
IND Lxxx inductor
RES Rxxx resistor
D Dxxx diode
NPN Qxxx NPN bipolar
PNP Qxxx PNP bipolar
NJF Jxxx N-channel JFET
PJF Jxxx P-channel JFET
NMOS Mxxx N-channel MOSFET
PMOS Mxxx P-channel MOSFET
VSWITCH Sxxx voltage controlled switch
Examples:
.MODEL RMAX RES (R=1.5 TC=.02 TC2=.005)
.MODEL QDRIV NPN (IS=1e-7 BF=30)
Top ↑
.NODESET – Initial bias point guess.
.NODESET { {node}={value} }*
Examples:
.NODESET V(2)=3.4 V(3)=-1V
.NOISE - Noise Analysis.
.NOISE {output variable} {name} [{print interval}]
Examples:
.NOISE V(5) VIN
.PLOT – Plot Output.
.PLOT [DC][AC][NOISE][TRAN] [ [{output variable}*]
Examples:
.PLOT DC V(3) V(2,3) V(R1) I(VIN)
.PLOT AC VM(2) VP(2) VG(2)
.PRINT – Print Output.
.PRINT [DC][AC][NOISE][TRAN] [{output variable}*]
Examples:
.PRINT DC V(3) V(2,3) V(R1) IB(Q13)
.PRINT AC VM(2) VP(2) VG(5) II(7)
Top ↑
.PROBE – Save simulation output PSPICE COMMAND.
.PROBE [output variable]*
Examples:
.PROBE
.PROBE V(3) VM(2) I(VIN)
.SENS - Sensitivity Analysis.
.SENS {output variable}*
Examples:
.SENS V(9) V(4,3) I(VCC)
.SUBCKT - Subcircuit Definition.
.SUBCKT {name} [{node}*]
Examples:
.SUBCKT OPAMP 1 2 101 102
.TEMP – Temperature Analysis.
.TEMP {value}*
Examples:
.TEMP 0 27 125
.TF – DC Transfer Function.
.TF {output variable} {input source name}
Examples:
.TF V(5) VIN
.TRAN - Transient Analysis.
.TRAN {print step value} {final time} [{no print time}
[{step ceiling value}]] [UIC]
Examples:
.TRAN 5NS 100NS
Top ↑