Simulation Generic Components

.IC (Initial Condition)

Parameter Name	Description
Initial Voltage	Amplitude of the node voltage (in Volts).

.NS (Node Set)

Parameter Name	Description
Initial Voltage	Amplitude of the node voltage (in Volts).

3 Phase Delta (3-Phase Delta Voltage Source)

Parameter Name	Description
FREQ	Frequency (in Hertz).
V_RMS	The root mean square (RMS) voltage (in Volts).

3 Phase Wye (3-Phase Wye Voltage Source)

Parameter Name	Description
FREQ	Frequency (in Hertz).
V_RMS	The root mean square (RMS) voltage (in Volts).

3PDT (Triple-Pole, Double-Throw Switch)

Parameter Name	Description
nodesUP_closed	If nodesUP_closed > 0, the switch closes the circuits in the Up position. Else the switch closes the circuits in the Down position.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

3PST (Triple-Pole, Single-Throw Switch)

Parameter Name	Description
closed	If closed > 0, the switch closes the circuits. Else the switch opens the circuits.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

555 (Timer 555)

No parameter present

AC Current Source

Parameter Name	Description
Amp	Peak amplitude of the sinusoid (in Amps).
DC	DC offset current of the signal generator (in Amps).
Freq	Frequency of the sinusoidal output current (in Hertz).
Phase	Phase shift of the sinusoid at time zero (in degrees).

AC Motor

Parameter Name	Description
J	Moment of inertia (in kg * m²).
K	Coupling factor.
LR	Rotor's leakage inductance (in Henrys).
LS	Stator's leakage inductance (in Henrys).
NP	Number of poles.
RR	Rotor's resistance (in Ohms).
RS	Stator's resistance (in Ohms).

AC Voltage Source

Parameter Name	Description
Amp	Peak amplitude of the sinusoid (in Volts).
Cpar	Parallel capacitance (in Farads).
DC	DC offset voltage of the signal generator (in Volts).
Freq	Frequency of the sinusoidal output voltage (in Hertz).
Phase	Phase shift of the sinusoid at time zero (in degrees).
Rser	Series resistance (in Ohms).

AM (Amplitude Modulator Voltage Source)

Parameter Name	Description
FC	Carrier frequency (in Hertz).
KA	Amplitude sensitivity.
OFFSET	DC offset of the signal generator (in Volts).
VC	Carrier amplitude (in Volts).

AtoD (AtoD Bridge)

Parameter Name	Description
fall_delay_inst	Fall delay (in seconds).
in_high_inst	Minimum 1-valued analog input (in Volts).
in_low_inst	Maximum 0-valued analog input (in Volts).
rise_delay_inst	Rise delay (in seconds).

Battery (Constant Voltage Source)

Parameter Name	Description
CPAR	Parallel capacitance (in Farads).
DC Magnitude	DC voltage value (in Volts).
RSER	Series resistance (in Ohms).

BJT NPN 4 GP (Bipolar NPN 4 Pins Transistor Gummel-Poon Model)

Refer to the 8.2.1 Gummel-Poon Models and 31.5.1 BJT - Bipolar Junction Transistor sections of the Ngspice User’s Manual.

BJT NPN 4 MGP (Bipolar NPN 4 Pins Transistor Modified Version of the Gummel-Poon Model)

Refer to the 8.2.1 Gummel-Poon Models and 31.5.1 BJT - Bipolar Junction Transistor sections of the Ngspice User’s Manual.

BJT NPN 4 VBIC (Bipolar NPN 4 Pins Transistor VBIC Model)

Refer to the 8.2.2 VBIC Model and 31.5.2 VBIC - Vertical Bipolar Inter-Company Model sections of the Ngspice User’s Manual.

BJT NPN VBIC (Bipolar NPN 3 Pins Transistor VBIC Model)

Refer to the 8.2.2 VBIC Model and 31.5.2 VBIC - Vertical Bipolar Inter-Company Model sections of the Ngspice User’s Manual.

BJT NPN_GP (Bipolar NPN 3 Pins Transistor Gummel-Poon Model)

Refer to the 8.2.1 Gummel-Poon Models and 31.5.1 BJT - Bipolar Junction Transistor sections of the Ngspice User’s Manual.

BJT NPN_MGP (Bipolar NPN 3 Pins Transistor Modified Version of the Gummel-Poon Model)

Refer to the 8.2.1 Gummel-Poon Models and 31.5.1 BJT - Bipolar Junction Transistor sections of the Ngspice User’s Manual.

BJT PNP 4 GP (Bipolar PNP 4 Pins Transistor Gummel-Poon Model)

Refer to the 8.2.1 Gummel-Poon Models and 31.5.1 BJT - Bipolar Junction Transistor sections of the Ngspice User’s Manual.

BJT PNP 4 MGP (Bipolar PNP 4 Pins Transistor Modified Version of the Gummel-Poon Model)

Refer to the 8.2.1 Gummel-Poon Models and 31.5.1 BJT - Bipolar Junction Transistor sections of the Ngspice User’s Manual.

BJT PNP 4 VBIC (Bipolar PNP 4 Pins Transistor VBIC Model)

Refer to the 8.2.2 VBIC Model and 31.5.2 VBIC - Vertical Bipolar Inter-Company Model sections of the Ngspice User’s Manual.

BJT PNP GP (Bipolar PNP 3 Pins Transistor Gummel-Poon Model)

Refer to the 8.2.1 Gummel-Poon Models and 31.5.1 BJT - Bipolar Junction Transistor sections of the Ngspice User’s Manual.

BJT PNP MGP (Bipolar PNP 3 Pins Transistor Modified Version of the Gummel-Poon Model)

Refer to the 8.2.1 Gummel-Poon Models and 31.5.1 BJT - Bipolar Junction Transistor sections of the Ngspice User’s Manual.

BJT PNP VBIC (Bipolar PNP 3 Pins Transistor VBIC Model)

Refer to the 8.2.2 VBIC Model and 31.5.2 VBIC - Vertical Bipolar Inter-Company Model sections of the Ngspice User’s Manual.

Bridge Rectifier (Four Diodes Bridge Rectifier)

Refer to the 7.1 Junction Diodes section of the Ngspice User’s Manual.

Capacitor

Parameter Name	Description
CPAR	Equivalent parallel capacitance (in Farads).
LSER	Equivalent series inductance (in Henrys).
RLSHUNT	Shunt resistance across LSER (in Ohms).
RPAR	Equivalent parallel resistance (in Ohms).
RSER	Equivalent series resistance (in Ohms).
TEMP	Component operating temperature (in °C).
Value	Value for the capacitance (in Farads).

The equivalent circuit for a capacitor.

CCCS (Current Controlled Current Source)

Parameter Name	Description
Gain	Current gain.
Voltage Source Name	Name of a voltage source through which the controlling current flows.

CCCS_4pins (Current Controlled Current Source)

Parameter Name	Description
Gain	Current gain.

CCCS_Expr (Current Controlled Current Source with an Arbitrary Expression)

Parameter Name	Description
Expression	Expression defining the source waveform.

CCCS_Poly (Current Controlled Current Source with SPICE POLY function)

Parameter Name	Description
Coefficients List	Polynomial coefficients.
Order	The number of dimensions of the polynomial. The number of controlling sources must be equal to the number of dimensions.
Voltage Source Names	Controlling voltage sources. Control variable is the current through these sources.

CCCS_Table (Current Controlled Current Source with Table function)

Parameter Name	Description
Expression	Expression delivering the x-value, which is used to generate a corresponding y-value according to the tabulated value pairs, using linear interpolation.
Table	Value pairs.

CCSW_Hysteresis (Current Controlled Switch with Hysteresis)

Parameter Name	Description
IH	Hysteresis current (in Amps).
Initial Condition	The starting point for the switch, either open (OFF) or closed (ON).
IT	Threshold current (in Amps).
ROFF	OFF state resistance (in Ohms).
RON	ON state resistance (in Ohms).

CCSW_Smooth_Trans (Current Controlled Switch with Smooth Transition)

Parameter Name	Description
IOFF	Control current for OFF state (in Amps).
ION	Control current for ON state (in Amps).
ROFF	OFF state resistance (in Ohms).
RON	ON state resistance (in Ohms).

CCVS (Current Controlled Voltage Source)

Parameter Name	Description
Gain	Transresistance (in Ohms).
Voltage Source Name	The name of a voltage source through which the controlling current flows.

CCVS_4pins (Current Controlled Voltage Source)

Parameter Name	Description
Gain	Transresistance (in Ohms).

CCVS_Expr (Current Controlled Voltage Source with an Arbitrary Expression)

Parameter Name	Description
Expression	Expression defining the source waveform.

CCVS_Poly (Current Controlled Voltage Source with SPICE POLY function)

Parameter Name	Description
Coefficients List	Polynomial coefficients.
Order	The number of dimensions of the polynomial. The number of controlling sources must be equal to the number of dimensions.
Voltage Source Names	Controlling voltage sources. Control variable is the current through these sources.

CCVS_Table (Current Controlled Voltage Source with Table function)

Parameter Name	Description
Expression	Expression delivering the x-value, which is used to generate a corresponding y-value according to the tabulated value pairs, using linear interpolation.
Table	Value pairs.

Comparator (Ideal Comparator)

Parameter Name	Description
VHIGH	Output upper limit (in Volts).
VHYS	Hysteresis width (in Volts).
VLOW	Output lower limit (in Volts).

Coupled Inductors (Pair of Coupled Inductors)

Parameter Name	Description
Coupling_Factor	Coefficient of coupling, must be greater than 0 and less than or equal to 1.
L1	Inductance of the 1st discrete inductor (in Henrys).
L2	Inductance of the 2nd discrete inductor (in Henrys).

Crystal

Parameter Name	Description
F0	Nominal output frequency of the crystal (in Hertz).
Q	Quality factor of the equivalent electrical circuit model for the crystal.
R	Resistance exhibited by the crystal at the series resonant frequency (in Ohms).

D Flip-Flop

Parameter Name	Description
clk_delay_inst	Delay from clk (in seconds).
clk_load_inst	Clk load value (in Farads).
data_load_inst	Data load value (in Farads).
fall_delay_inst	Fall delay (in seconds).
reset_delay_inst	Delay from reset (in seconds).
reset_load_inst	Reset load (in Farads).
rise_delay_inst	Rise delay (in seconds).
set_delay_inst	Delay from set (in seconds).
set_load	Set load value (in Farads).

D Latch (Digital D Latch)

Parameter Name	Description
data_delay_inst	Delay from data (in seconds).
data_load_inst	Data load (in Farads).
enable_delay_inst	Delay from enable (in seconds).
enable_load_inst	Enable load value (in Farads).
fall_delay_inst	Fall delay (in seconds).
reset_delay_inst	Delay from RESET (in seconds).
reset_load_inst	Reset load (in Farads).
rise_delay_inst	Rise delay (in seconds).
set_delay_inst	Delay from SET (in seconds).
set_load_inst	Set load value (in Farads).

Darlington BJT NPN (Darlington NPN Bipolar Transistor)

Refer to the 8.2.1 Gummel-Poon Models and 31.5.1 BJT - Bipolar Junction Transistor sections of the Ngspice User’s Manual.

Darlington BJT PNP (Darlington PNP Bipolar Transistor)

Refer to the 8.2.1 Gummel-Poon Models and 31.5.1 BJT - Bipolar Junction Transistor sections of the Ngspice User’s Manual.

DC Current Source

Parameter Name	Description
DC	Amplitude of the source current (in Amps).

DC Motor

Parameter Name	Description
BM	Viscous friction (in N * m / (rad * s)).
JM	Moment of inertia (in kg * m²).
KE	Back EMF constant (in V * s / rad).
KT	Torque constant (in N * m / A).
LA	Armature inductance (in Henrys).
RA	Armature resistance (in Ohms).
TL	Load torque (in N * m).

Delay Line

Parameter Name	Description
DELAY	Time delay (in seconds).

DIAC (DIAC Thyristor)

Parameter Name	Description
RS	Series resistance (in Ohms).
VK	Breakdown voltage (in Volts).

Digital 0 (Digital Zero Generator)

Parameter Name	Description
adc_fall_delay_inst	Fall delay (in seconds).
adc_rise_delay_inst	Rise delay (in seconds).

Digital 1 (Digital One Generator)

Parameter Name	Description
adc_fall_delay_inst	Fall delay (in seconds).
adc_rise_delay_inst	Rise delay (in seconds).

Digital AND (Digital AND Gate)

Parameter Name	Description
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
input_load_inst	The capacitance of one or all digital inputs (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).

Digital Buff (Digital Buffers)

Parameter Name	Description
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
input_load_inst	The capacitance of one or all digital inputs (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).

Digital Clock

Parameter Name	Description
adc_fall_delay_inst	Fall delay (in seconds).
adc_in_high_inst	Minimum 1-valued analog input (in Volts).
adc_in_low_inst	Maximum 0-valued analog input (in Volts).
adc_rise_delay_inst	Rise delay (in seconds).
period	Period (in seconds).
phase	Phase of the pulse signal (in degrees).
pwidth	Pulse width (in seconds).
tdelay	Delay time (in seconds).
tfall	Fall time (in seconds).
trise	Rise time (in seconds).
vhigh	Pulsed value (in Volts).
vlow	Initial value (in Volts).

Digital Inverter

Parameter Name	Description
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
input_load_inst	The capacitance of one or all digital inputs (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).

Digital NAND (Digital NAND Gate)

Parameter Name	Description
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
input_load_inst	The capacitance of one or all digital inputs (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).

Digital NOR (Digital NOR Gate)

Parameter Name	Description
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
input_load_inst	The capacitance of one or all digital inputs (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).

Digital NOT (Digital NOT Gate)

Parameter Name	Description
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
input_load_inst	The capacitance of one or all digital inputs (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).

Digital OR (Digital OR Gate)

Parameter Name	Description
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
input_load_inst	The capacitance of one or all digital inputs (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).

Digital XNOR (Digital XNOR Gate)

Parameter Name	Description
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
input_load_inst	The capacitance of one or all digital inputs (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).

Digital XOR (Digital XOR Gate)

Parameter Name	Description
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
input_load_inst	The capacitance of one or all digital inputs (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).

Diode

Refer to the 7.1 Junction Diodes section of the Ngspice User’s Manual.

DPDT Relay (Double-Pole, Double-Throw Relay)

Parameter Name	Description
IOFF	Control current for OFF state (in Amps).
ION	Control current for ON state (in Amps).
L_C	Coil inductance (in Henrys).
ROFF	OFF state resistance (in Ohms).
RON	ON state resistance (in Ohms).
R_C	Coil resistance (in Ohms).

DPDT SW (Double-Pole, Double-Throw Switch)

Parameter Name	Description
nodesUP_closed	If nodesUP_closed > 0, the switch closes the circuits in the Up position. Else the switch closes the circuits in the Down position.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

DPST Push Button (Double-Pole, Single-Throw Button)

Parameter Name	Description
closed	If closed > 0, the button closes the circuits. Else the button opens the circuits.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

DPST Relay (Double-Pole, Single-Throw Relay)

Parameter Name	Description
IOFF	Control current for OFF state (in Amps).
ION	Control current for ON state (in Amps).
L_C	Coil inductance (in Henrys).
ROFF	OFF state resistance (in Ohms).
RON	ON state resistance (in Ohms).
R_C	Coil resistance (in Ohms).

DPST SW (Double-Pole, Single-Throw Switch)

Parameter Name	Description
closed	If closed > 0, the switch closes the circuits. Else the switch opens the circuits.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

DtoA (DtoA Bridge)

Parameter Name	Description
input_load_inst	Input load (in Farads).
out_high_inst	1-valued analog output (in Volts).
out_low_inst	0-valued analog output (in Volts).
out_undef_inst	Undefined valued analog output (in Volts).
t_fall_inst	Fall time 1->0 (in seconds).
t_rise_inst	Rise time 0->1 (in seconds).

Dual Diode

Refer to the 7.1 Junction Diodes section of the Ngspice User’s Manual.

FSK (Frequency-Shift Keying Modulator)

Parameter Name	Description
NC0	Number of cycles of the output waveform that will occur in the duration of a single zero bit of the input waveform.
NC1	Number of cycles of the output waveform that will occur in the duration of a single one bit of the input waveform.
TB	Duration of a single bit (in seconds).
WMAG	Magnitude of the output waveform (in Volts).

Function Current Source (Functional Current Source)

Parameter Name	Description
Expression	Expression defining the source waveform.

Functional Voltage Source

Parameter Name	Description
Expression	Expression defining the source waveform.

Fuse

Parameter Name	Description
CURRENT	Fuse current (in Amps).
RESISTANCE	Internal resistance (in Ohms).

Gyrator

Parameter Name	Description
G	Gyration conductance (in mhos).

Inductor

Parameter Name	Description
CPAR	Equivalent parallel capacitance (in Farads).
DTEMP	Component operating temperature difference (in °C).
Initial Current	Time-zero current flowing through inductor (in Amps).
M	Number of parallel units.
RPAR	Equivalent parallel resistance (in Ohms).
RSER	Equivalent series resistance (in Ohms).
TC1	First order temperature coefficient.
TC2	Second order temperature coefficient.
TEMP	Component operating temperature (in °C).
Value	Value for the inductance (in Henrys).

Note that the T_REL_LOCAL parameter is not used in this component.

The equivalent circuit for an inductor.

ISRC (Current Source)

Refer to Verifying & Preparing a Project for Simulation – Adding and Configuring a Simulation Source.

JFET N-ch Level1 (N-channel Junction gate Field-Effect Transistor Level1)

Refer to the 9.2.2 JFET level 1 model with Parker Skellern modification section of the Ngspice User’s Manual.

JFET N-ch Level2 (N-channel Junction gate Field-Effect Transistor Level2)

Refer to the 9.2.3 JFET level 2 Parker Skellern model section of the Ngspice User’s Manual.

JFET P-ch Level1 (P-channel Junction gate Field-Effect Transistor Level1)

Refer to the 9.2.2 JFET level 1 model with Parker Skellern modification section of the Ngspice User’s Manual.

JFET P-ch Level2 (P-channel Junction gate Field-Effect Transistor Level2)

Refer to the 9.2.3 JFET level 2 Parker Skellern model section of the Ngspice User’s Manual.

JK Flip-Flop

Parameter Name	Description
clk_delay_inst	Delay from clk (in seconds).
clk_load_inst	Clk load value (in Farads).
fall_delay_inst	Fall delay (in seconds).
jk_load_inst	J,K load values (in Farads).
reset_delay_inst	delay from reset (in seconds).
reset_load_inst	Reset load (in Farads).
rise_delay_inst	Rise delay (in seconds).
set_delay_inst	Delay from set (in seconds).
set_load_inst	Set load value (in Farads).

LED (Light-Emitting Diode)

Refer to the 7.1 Junction Diodes section of the Ngspice User’s Manual.

Linear Voltage Regulator (Adjustable) (Positive Adjustable Voltage Regulator)

No parameter present

Linear Voltage Regulator (Fixed) (Positive Fixed Voltage regulator)

Parameter Name	Description
Av_feedback	Av*Feedback factor (Av_feedback = 1665 for Vout = 5V (default); Av_feedback = 694 for Vout = 12V; Av_feedback = 550 for Vout = 15V).
R1_Value	Value of R1 (in Ohms) (R1_Value = 1020 for Vout = 5V (default); R1_Value = 2448 for Vout = 12V; R1_Value = 3060 for Vout = 15V).

MOSFET N-ch Lev1 (N-channel MOS1 MOSFET Shichman and Hodges Model)

Refer to the 11.2.1 MOS Level 1 and 31.6.1 MOS1 - Level 1 MOSFET model with Meyer capacitance model sections of the Ngspice User’s Manual.

MOSFET N-ch Lev2 (N-channel MOSFET MOS2 Grove-Frohman Model)

Refer to the 11.2.2 MOS Level 2 and 31.6.2 MOS2 - Level 2 MOSFET model with Meyer capacitance model sections of the Ngspice User’s Manual.

MOSFET N-ch Lev3 (N-channel MOSFET MOS3 Model)

Refer to the 11.2.3 MOS Level 3 and 31.6.3 MOS3 - Level 3 MOSFET model with Meyer capacitance model sections of the Ngspice User’s Manual.

MOSFET N-ch Lev4 (N-channel MOSFET BSIM1 Model)

Refer to the 11.2.8 BSIM1 model (level 4) and 31.6.6 BSIM1 - Berkeley Short Channel IGFET Model sections of the Ngspice User’s Manual.

MOSFET N-ch Lev5 (N-channel MOSFET BSIM2 Model)

Refer to the 11.2.9 BSIM2 model (level 5) and 31.6.7 BSIM2 - Berkeley Short Channel IGFET Model sections of the Ngspice User’s Manual.

MOSFET N-ch Lev6 (N-channel MOSFET MOS6 Model)

Refer to the 11.2.4 MOS Level 6 and 31.6.4 MOS6 - Level 6 MOSFET model with Meyer capacitance model sections of the Ngspice User’s Manual.

MOSFET N-ch Lev8 (N-channel MOSFET BSIM3v0 v3.0 Model)

Refer to the 11.2.10 BSIM3 model (levels 8, 49) and 31.6.8 BSIM3 sections of the Ngspice User’s Manual.

MOSFET N-ch Lev8_1 (N-channel MOSFET BSIM3v1 v3.1 Model)

Refer to the 11.2.10 BSIM3 model (levels 8, 49) and 31.6.8 BSIM3 sections of the Ngspice User’s Manual.

MOSFET N-ch Lev8_2 (N-channel MOSFET BSIM3v32 v3.2 - 3.2.4 Model)

Refer to the 11.2.10 BSIM3 model (levels 8, 49) and 31.6.8 BSIM3 sections of the Ngspice User’s Manual.

MOSFET N-ch Lev8_3 (N-channel MOSFET BSIM3v3 v3.3.0 Model)

Refer to the 11.2.10 BSIM3 model (levels 8, 49) and 31.6.8 BSIM3 sections of the Ngspice User’s Manual.

MOSFET N-ch Lev9 (N-channel MOSFET MOS9 Model)

Refer to the 31.6.5 MOS9 - Modified Level 3 MOSFET model section of the Ngspice User’s Manual.

MOSFET N-ch Lev10 (N-channel MOSFET BSIM4SOI v4.3.1 Model)

Refer to the 11.2.14 BSIMSOI models (levels 10, 58, 55, 56, 57) section of the Ngspice User’s Manual.

MOSFET N-ch Lev14 (N-channel MOSFET BSIM4v5 v4.0 - 4.5 Model)

Refer to the 11.2.11 BSIM4 model (levels 14, 54) and 31.6.9 BSIM4 sections of the Ngspice User’s Manual.

MOSFET N-ch Lev14_1 (N-channel MOSFET BSIM4v6 v4.6.5 Model)

Refer to the 11.2.11 BSIM4 model (levels 14, 54) and 31.6.9 BSIM4 sections of the Ngspice User’s Manual.

MOSFET N-ch Lev14_2 (N-channel MOSFET BSIM4v7 v4.7.0 Model)

Refer to the 11.2.11 BSIM4 model (levels 14, 54) and 31.6.9 BSIM4 sections of the Ngspice User’s Manual.

MOSFET N-ch Lev14_3 (N-channel MOSFET BSIM4v7 v4.7.0 Model)

Refer to the 11.2.11 BSIM4 model (levels 14, 54) and 31.6.9 BSIM4 sections of the Ngspice User’s Manual.

MOSFET N-ch Lev55 (N-channel MOSFET BSIM3SOI_FD Model)

Refer to the 11.2.14 BSIMSOI models (levels 10, 58, 55, 56, 57) section of the Ngspice User’s Manual.

MOSFET N-ch Lev56 (N-channel MOSFET BSIM3SOI_DD Model)

Refer to the 11.2.14 BSIMSOI models (levels 10, 58, 55, 56, 57) section of the Ngspice User’s Manual.

MOSFET N-ch Lev57 (N-channel MOSFET BSIM3SOI_PD Model)

Refer to the 11.2.14 BSIMSOI models (levels 10, 58, 55, 56, 57) section of the Ngspice User’s Manual.

MOSFET N-ch Lev68 (N-channel MOSFET HISIM2 v2.8.0 Model)

Refer to the 11.2.16 HiSIM models of the University of Hiroshima section of the Ngspice User’s Manual.

MOSFET N-ch Lev73 (N-channel MOSFET HISIM_HV1 v1.2.4 Model)

Refer to the 11.2.16 HiSIM models of the University of Hiroshima section of the Ngspice User’s Manual.

MOSFET N-ch Lev73_1 (N-channel MOSFET HISIM_HV2 v2.2.0 Model)

Refer to the 11.2.16 HiSIM models of the University of Hiroshima section of the Ngspice User’s Manual.

MOSFET N-ch VDMOS (N-channel Power MOSFET VDMOS Model)

Refer to the 11.3 Power MOSFET model (VDMOS) section of the Ngspice User’s Manual.

MOSFET P-ch Lev1 (P-channel MOS1 MOSFET Shichman and Hodges Model)

Refer to the 11.2.1 MOS Level 1 and 31.6.1 MOS1 - Level 1 MOSFET model with Meyer capacitance model sections of the Ngspice User’s Manual.

MOSFET P-ch Lev2 (P-channel MOSFET MOS2 Grove-Frohman Model)

Refer to the 11.2.2 MOS Level 2 and 31.6.2 MOS2 - Level 2 MOSFET model with Meyer capacitance model sections of the Ngspice User’s Manual.

MOSFET P-ch Lev3 (P-channel MOSFET MOS3 Model)

Refer to the 11.2.3 MOS Level 3 and 31.6.3 MOS3 - Level 3 MOSFET model with Meyer capacitance model sections of the Ngspice User’s Manual.

MOSFET P-ch Lev4 (P-channel MOSFET BSIM1 Model)

Refer to the 11.2.8 BSIM1 model (level 4) and 31.6.6 BSIM1 - Berkeley Short Channel IGFET Model sections of the Ngspice User’s Manual.

MOSFET P-ch Lev5 (P-channel MOSFET BSIM2 Model)

Refer to the 11.2.9 BSIM2 model (level 5) and 31.6.7 BSIM2 - Berkeley Short Channel IGFET Model sections of the Ngspice User’s Manual.

MOSFET P-ch Lev6 (P-channel MOSFET MOS6 Model)

Refer to the 11.2.4 MOS Level 6 and 31.6.4 MOS6 - Level 6 MOSFET model with Meyer capacitance model sections of the Ngspice User’s Manual.

MOSFET P-ch Lev8 (P-channel MOSFET BSIM3v0 v3.0 Model)

Refer to the 11.2.10 BSIM3 model (levels 8, 49) and 31.6.8 BSIM3 sections of the Ngspice User’s Manual.

MOSFET P-ch Lev8_1 (P-channel MOSFET BSIM3v1 v3.1 Model)

Refer to the 11.2.10 BSIM3 model (levels 8, 49) and 31.6.8 BSIM3 sections of the Ngspice User’s Manual.

MOSFET P-ch Lev8_2 (P-channel MOSFET BSIM3v32 v3.2 - 3.2.4 Model)

Refer to the 11.2.10 BSIM3 model (levels 8, 49) and 31.6.8 BSIM3 sections of the Ngspice User’s Manual.

MOSFET P-ch Lev8_3 (P-channel MOSFET BSIM3v3 v3.3.0 Model)

Refer to the 11.2.10 BSIM3 model (levels 8, 49) and 31.6.8 BSIM3 sections of the Ngspice User’s Manual.

MOSFET P-ch Lev9 (P-channel MOSFET MOS9 Model)

Refer to the 31.6.5 MOS9 - Modified Level 3 MOSFET model section of the Ngspice User’s Manual.

MOSFET P-ch Lev10 (P-channel MOSFET BSIM4SOI v4.3.1 Model)

Refer to the 11.2.14 BSIMSOI models (levels 10, 58, 55, 56, 57) section of the Ngspice User’s Manual.

MOSFET P-ch Lev14 (P-channel MOSFET BSIM4v5 v4.0 - 4.5 Model)

Refer to the 11.2.11 BSIM4 model (levels 14, 54) and 31.6.9 BSIM4 sections of the Ngspice User’s Manual.

MOSFET P-ch Lev14_1 (P-channel MOSFET BSIM4v6 v4.6.5 Model)

Refer to the 11.2.11 BSIM4 model (levels 14, 54) and 31.6.9 BSIM4 sections of the Ngspice User’s Manual.

MOSFET P-ch Lev14_2 (P-channel MOSFET BSIM4v7 v4.7.0 Model)

Refer to the 11.2.11 BSIM4 model (levels 14, 54) and 31.6.9 BSIM4 sections of the Ngspice User’s Manual.

MOSFET P-ch Lev14_3 (P-channel MOSFET BSIM4v8 v4.8.1 Model)

Refer to the 11.2.11 BSIM4 model (levels 14, 54) and 31.6.9 BSIM4 sections of the Ngspice User’s Manual.

MOSFET P-ch Lev55 (P-channel MOSFET BSIM3SOI_FD Model)

Refer to the 11.2.14 BSIMSOI models (levels 10, 58, 55, 56, 57) section of the Ngspice User’s Manual.

MOSFET P-ch Lev56 (P-channel MOSFET BSIM3SOI_DD Model)

Refer to the 11.2.14 BSIMSOI models (levels 10, 58, 55, 56, 57) section of the Ngspice User’s Manual.

MOSFET P-ch Lev57 (P-channel MOSFET BSIM3SOI_PD Model)

Refer to the 11.2.14 BSIMSOI models (levels 10, 58, 55, 56, 57) section of the Ngspice User’s Manual.

MOSFET P-ch Lev68 (P-channel MOSFET HISIM2 Model)

Refer to the 11.2.16 HiSIM models of the University of Hiroshima section of the Ngspice User’s Manual.

MOSFET P-ch Lev73 (P-channel MOSFET HISIM_HV1 v1.2.4 Model)

Refer to the 11.2.16 HiSIM models of the University of Hiroshima section of the Ngspice User’s Manual.

MOSFET P-ch Lev73_1 (P-channel MOSFET HISIM_HV2 v2.2.0 Model)

Refer to the 11.2.16 HiSIM models of the University of Hiroshima section of the Ngspice User’s Manual.

MOSFET P-ch VDMOS (P-channel Power MOSFET VDMOS Model)

Refer to the 11.3 Power MOSFET model (VDMOS) section of the Ngspice User’s Manual.

Mutual Inductance (Mutual Inductance with List of inductors)

Parameter Name	Description
Coupling Factor	Coefficient of coupling.
Inductor List	Names of the coupled inductors.

OpAmp (Ideal Operational Amplifier)

Parameter Name	Description
GAIN	Voltage gain.

OpAmp with power terminals (Ideal Operational Amplifier)

Parameter Name	Description
GAIN	Voltage gain.

Pentode

Parameter Name	Description
CCG	Input (grid 1 to cathode) capacitance (in Farads).
CCP	Output (plate to cathode) capacitance (in Farads).
CPG1	Miller (grid 1 to plate) capacitance (in Farads).
EX	Exponent.
KG1	Parameter inversely proportional to overall plate current.
KG2	Inverse screen grid current sensitivity.
KP	Parameter that affects the plate currents for large plate voltages and large negative grid voltages.
KVB	Knee parameters (in Volts).
MU	Amplification factor.
RGI	Grid-to-cathode resistance (in Ohms).
VCT	Contact potential (in Volts).

Photodiode

Parameter Name	Description
BV	Reverse breakdown voltage (in Volts).
CJO	Zero-bias junction capacitance (in Farads).
IS	Saturation current (in Amps)
N	Emission coefficient.
RESP	Sensitivity (in Amps / Watt).
Rint	Internal resistance (in Ohms).

PID Controller

Parameter Name	Description
KD	Derivative scale value.
KI	Integral scale value.
KP	Proportional scale value.

Potentiometer

Parameter Name	Description
position	The position of the wiper along the resistors' track. The value can be in the range 0 (fully left/anti-clockwise) to 1 (fully right/clockwise), with 0.5 being the halfway point, with equal resistance on both sides.
value	Maximum resistance value (in Ohms).

PSK (Phase-Shift Keying Modulator)

Parameter Name	Description
NC	Number of cycles of the output waveform that will occur in the duration of one bit of the input waveform.
TB	Duration of a single bit (in seconds).
WMAG	Magnitude of the output waveform (in Volts).

PSPICE AND (PSPICE AND logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE AND3 (PSPICE tristate AND logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE BUF (PSPICE digital buffer)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE BUF3 (PSPICE tristate digital buffer)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE INV (PSPICE digital invertor)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE INV3 (PSPICE tristate digital invertor)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE NAND (PSPICE NAND logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE NAND3 (PSPICE tristate NAND logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE NOR (PSPICE NOR logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE NOR3 (PSPICE tristate NOR logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE NXOR (PSPICE NXOR logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE NXOR3 (PSPICE tristate NXOR logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE OR (PSPICE OR logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE OR3 (PSPICE tristate OR logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE STIM (PSPICE digital stimulus generator)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

signal

Time and value pairs. The first number in each pair specifies the time (in seconds) for the new value (0, 1, X, or Z).

PSPICE XOR (PSPICE XOR logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

PSPICE XOR3 (PSPICE tristate XOR logic gate)

Parameter Name

Description

IO_LEVEL

Defines what level of interface subcircuit model the simulator must use for a digital part that is connected to an analog part:

0 = circuit-wide default
1 = AtoD1 and DtoA1
2 = AtoD2 and DtoA2
3 = AtoD3 and DtoA3
4 = AtoD4 and DtoA4

MNTYMXDLY

Defines the digital propagation delay level that the simulator must use for a digital part:

0 = circuit-wide default
1 = minimum
2 = typical
3 = maximum
4 = worst-case (min/max)

Push Button NC (Push Button Normally Closed)

Parameter Name	Description
closed	If closed > 0, the button closes the circuit. Else the button opens the circuit.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

Push Button NO (Push Button Normally Opened)

Parameter Name	Description
closed	If closed > 0, the button closes the circuit. Else the button opens the circuit.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

PUT (PUT Thyristor)

Parameter Name	Description
DVDT	Critical rate of rise of off-state voltage (in Volts / second).
IGT	Gate trigger current (in Amps).
IH	DC holding current (in Amps).
K1	Tweak factor for DVDT.
K2	Tweak factor for TQ.
TON	Turn-on time (in seconds).
TQ	Turn-off time (in seconds).
VDRM	Maximum repetitive peak off-state voltage (in Volts).
VTMIN	Minimum anode to cathode on-state voltage (in Volts).

PWM (Pulse Width Modulation Generator)

Parameter Name	Description
MODFREQ	Frequency of the modulating waveform (in Hertz).
MODHIGH	High voltage value of the modulating waveform (in Volts).
MODLOW	Low voltage value of the modulating waveform (in Volts).
PWMHIGH	High voltage value of the PWM output (in Volts).
PWMLOW	Low voltage value of the PWM output (in Volts).

PWM Generator (Pulse Width Modulation Generator)

Parameter Name	Description
MODFREQ	Frequency of the modulating waveform (in Hertz).
MODHIGH	High voltage value of the modulating waveform (in Volts).
MODLOW	Low voltage value of the modulating waveform (in Volts).
PWMHIGH	High voltage value of the PWM output (in Volts).
PWMLOW	Low voltage value of the PWM output (in Volts).

QAM (Quadrature Amplitude Modulation Generator)

Parameter Name	Description
F0	Carrier frequency (in Hertz).

Resistor

Parameter Name	Description
DTEMP	Component operating temperature difference (in °C).
TC	Comma-separated list of polynomial coefficients that define temperature dependence of the resistance. For example, when four polynomial coefficients are given (`a, b, c, d`), the resistance `R` will be: `R = R0 * (1 + a * dt + b * dt² + c * dt³ + d * dt⁴)`, where `R0` is the resistance at the nominal temperature and `dt` is the difference between the resistor's temperature and the nominal temperature. Note that when defined, the `TC1` and `TC2` parameters override the `TC` parameter. To use the `TC` parameter, clear values of `TC1` and `TC2`.
TC1	First order temperature coefficient.
TC2	Second order temperature coefficient.
TEMP	Component operating temperature (in °C).
Value	Value for the resistance (in Ohms).

Note that the T_REL_LOCAL parameter is not used in this component.

Resonator

Parameter Name	Description
F0	Center frequency (in Hertz).
Lin	Value of inductance (in Henrys).
Q0	Quality factor.

SCR (SCR Thyristor)

Parameter Name	Description
DVDT	Critical rate of rise of off-state voltage (in Volts / second).
IGT	Gate trigger current (in Amps).
IH	DC holding current (in Amps).
K1	Tweak factor for DVDT.
K2	Tweak factor for TQ.
TON	Turn-on time (in seconds).
TQ	Turn-off time (in seconds).
VDRM	Maximum repetitive peak off-state voltage (in Volts).
VTMIN	Minimum anode to cathode on-state voltage (in Volts).

Schottky Diode

Refer to the 7.1 Junction Diodes section of the Ngspice User’s Manual.

Snubber

Parameter Name	Description
CSNUB	Parallel capacitance value (in Farads).
RSNUB	Parallel resistance value (in Ohms).

Sparkgap (Spark Gap)

Parameter Name	Description
CARC	Arc capacitance (in Farads).
CPAR	Gap capacitance (in Farads).
ISUS	Sustaining current under which the arc is stopped (in Amps).
LPL	Lead inductance (in Henrys).
RNEG	Negative resistance once struck (in Ohms).
RPL	Flux loss associated with LPL (in Ohms).
VARC	Voltage across the spark-gap once struck (in Volts).
VTHRES	Voltage at which the spark-gap strikes (in Volts).

SPDT Relay (Single-Pole, Double-Throw Relay)

Parameter Name	Description
IOFF	Control current for OFF state (in Amps).
ION	Control current for ON state (in Amps).
L_C	Coil inductance (in Henrys).
ROFF	OFF state resistance (in Ohms).
RON	ON state resistance (in Ohms).
R_C	Coil resistance (in Ohms).

SPDT SW (Single-Pole, Double-Throw Switch)

Parameter Name	Description
nodeUP_closed	If nodeUP_closed > 0, the switch closes the circuit in the Up position. Else the switch closes the circuit in the Down position.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

SPST Relay NC (Single-Pole, Single-Throw Normally Closed Relay)

Parameter Name	Description
IOFF	Control current for OFF state (in Amps).
ION	Control current for ON state (in Amps).
L_C	Coil inductance (in Henrys).
ROFF	OFF state resistance (in Ohms).
RON	ON state resistance (in Ohms).
R_C	Coil resistance (in Ohms).

SPST Relay NO (Single-Pole, Single-Throw Normally Opened Relay)

Parameter Name	Description
IOFF	Control current for OFF state (in Amps).
ION	Control current for ON state (in Amps).
L_C	Coil inductance (in Henrys).
ROFF	OFF state resistance (in Ohms).
RON	ON state resistance (in Ohms).
R_C	Coil resistance (in Ohms).

SPST SW (Single-Pole, Single-Throw Switch)

Parameter Name	Description
closed	If closed > 0, the switch closes the circuit. Else the switch opens the circuit.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

SR Flip-Flop

Parameter Name	Description
clk_delay_inst	Delay from clk (in seconds).
clk_load_inst	Clk load value (in Farads).
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
reset_delay_inst	Delay from reset (in seconds).
reset_load_inst	Reset load (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).
set_delay_inst	Delay from set (in seconds).
set_load_inst	Set load value (in Farads).
sr_load_inst	Set/reset loads (in Farads).

SR Latch (Digital SR Latch)

Parameter Name	Description
enable_delay_inst	Delay from enable (in seconds).
enable_load_inst	Enable load value (in Farads).
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
reset_delay_inst	Delay from RESET (in seconds).
reset_load_inst	Reset load (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).
set_delay_inst	Delay from SET (in seconds).
set_load_inst	Set load value (in Farads).
sr_delay_inst	Delay from s or r input change (in seconds).
sr_load_inst	S & r input loads (in Farads).

Stepper Motor

Parameter Name	Description
HARDNESS	Unitless factor which sets stop hardness.
JLOAD	Rotational inertia of motor shaft (in kg * m²).
JMOTOR	Rotational inertia of motor load (in kg * m²).
K	Motor constant (in V * s / rad).
KD	Damping torque (in N * m / (rad * s)).
LIMIT	Hard stop position (in radians).
LS	Stator Coil Inductance (in Henrys).
RS	Stator Coil Resistance (in Ohms).
STEP_ANGLE	Angle width of one full step (in degrees).
TD	Detent torque (in N * m).
TLOAD	Load torque (in N * m).

Suppressor Dual

Refer to the 7.1 Junction Diodes section of the Ngspice User’s Manual.

Suppressor Single

Refer to the 7.1 Junction Diodes section of the Ngspice User’s Manual.

SW NC (Switch Normally Closed)

Parameter Name	Description
closed	If closed > 0, the switch closes the circuit. Else the switch opens the circuit.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

SW NO (Switch Normally Opened)

Parameter Name	Description
closed	If closed > 0, the switch closes the circuit. Else the switch opens the circuit.
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).

Switching Capacitor

Parameter Name	Description
CVALUE	Value for the capacitance (in Farads).
FSAMPLE	Switching frequency (in Hertz).
ROFF	OFF state resistance (in Ohms).
RON	ON state resistance (in Ohms).

T Flip-Flop (Digital T Flip-Flop)

Parameter Name	Description
clk_delay_inst	Delay from clk (in seconds).
clk_load_inst	Clk load value (in Farads).
fall_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital zero (in seconds).
reset_delay_inst	Delay from reset (in seconds).
reset_load_inst	Reset load (in Farads).
rise_delay_inst	The delay time between a change in a model’s internal state, as driven by its inputs, and a change in output to digital one (in seconds).
set_delay_inst	Delay from set (in seconds).
set_load_inst	Set load value (in Farads).
t_load_inst	Toggle load value (in Farads).

Tetrode

Parameter Name	Description
CCG	Input (grid 1 to cathode) capacitance (in Farads).
CCP	Output (plate to cathode) capacitance (in Farads).
CPG1	Miller (grid 1 to plate) capacitance (in Farads).
EX	Exponent.
KG1	Parameter inversely proportional to overall plate current.
KG2	Inverse screen grid current sensitivity.
KP	Parameter that affects the plate currents for large plate voltages and large negative grid voltages.
KVB	Knee parameters (in Volts).
MU	Amplification factor.
RGI	Grid-to-cathode resistance (in Ohms).

Time Controlled SW (Time Controlled Switch)

Parameter Name	Description
Rclosed	Closed state resistance (in Ohms).
Ropen	Open state resistance (in Ohms).
tSwitch	Time at which the switch begins to switch (in seconds).
ttran	Time required to switch the state (in seconds). This value must be realistic, not 0.

TL Lossless (Lossless Transmission Line)

Parameter Name	Description
Char. Impedance	Characteristic impedance (in Ohms).
Frequency	Frequency (in Hertz).
Initial Current 1	Time-zero current at port 1 of the transmission line (in Amps).
Initial Current 2	Time-zero current at port 2 of the transmission line (in Amps).
Initial Voltage 1	Time-zero voltage at port 1 of the transmission line (in Volts).
Initial Voltage 2	Time-zero voltage at port 2 of the transmission line (in Volts).
Normalised Length	Normalized electrical length of the transmission line with respect to the wavelength in the line, at the specified frequency.
Transmission Delay	Transmission delay (in seconds).

Transformer Ideal (Ideal Transformer)

Parameter Name	Description
GAIN	Voltage gain.

Transformer Wideband (Wideband Transformer)

Parameter Name	Description
FH	High frequency breakpoint (in Hertz).
FL	Low frequency breakpoint (in Hertz).
N	Number of turns.
RS	Primary series resistance (in Ohms).

Transformer With Central Tap Ideal (Ideal Transformer With Central Tap)

Parameter Name	Description
L1	Primary inductance (in Henrys).
L2	Secondary inductance 1 (in Henrys).
L3	Secondary inductance 2 (in Henrys).

TRIAC (TRIAC Thyristor)

Parameter Name	Description
DVDT	Critical rate of rise of off-state voltage (in Volts / second).
IGT	Gate trigger current (in Amps).
IH	DC holding current (in Amps).
K1	Tweak factor for DVDT.
K2	Tweak factor for TQ.
TON	Turn-on time (in seconds).
TQ	Turn-off time (in seconds).
VDRM	Maximum repetitive peak off-state voltage (in Volts).
VTMIN	Minimum anode to cathode on-state voltage (in Volts).

Triode

Parameter Name	Description
CGC	Grid to cathode capacitance (in Farads).
CGP	Grid to plate capacitance (in Farads).
CPC	Plate to cathode capacitance (in Farads).
K	Tube constant k.
MU	Tube constant mu.

Varactor

Refer to the 7.1 Junction Diodes section of the Ngspice User’s Manual.

VCCS (Voltage Controlled Current Source)

Parameter Name	Description
Gain	Transconductance (in mhos).

VCCS_Expr (Voltage Controlled Current Source with an Arbitrary Expression)

Parameter Name	Description
Expression	Expression defining the source waveform.

VCCS_Poly (Voltage Controlled Current Source with SPICE POLY function)

Parameter Name	Description
Coefficients List	Polynomial coefficients.
Node Names	Set of controlling voltages.
Order	The number of dimensions of the polynomial. The number of pairs of controlling nodes must be equal to the number of dimensions.

VCCS_Table (Voltage Controlled Current Source with Table function)

Parameter Name	Description
Expression	Expression delivering the x-value, which is used to generate a corresponding y-value according to the tabulated value pairs, using linear interpolation.
Table	Value pairs.

VCO (Voltage Controlled Oscillator)

Parameter Name	Description
F0	Center frequency (in Hertz).
KF	Sensitivity (in Hz/V).
VP	Amplitude (in Volts).

VCO Square (Voltage Controlled Square Wave Oscillator)

Parameter Name	Description
F0	Center frequency (in Hertz).
KF	Sensitivity (in Hz/V).
VH	Peak output high value (in Volts).
VL	Peak output low value (in Volts).

VCSW_Hysteresis (Voltage Controlled Switch with Hysteresis)

Parameter Name	Description
Initial Condition	The starting point for the switch, either open (OFF) or closed (ON).
ROFF	OFF state resistance (in Ohms).
RON	ON state resistance (in Ohms).
VH	Hysteresis voltage (in Volts).
VT	Threshold voltage (in Volts).

VCSW_Smooth_Trans (Voltage Controlled Switch with Smooth Transition)

Parameter Name	Description
ROFF	OFF state resistance (in Ohms).
RON	ON state resistance (in Ohms).
VOFF	Control voltage for OFF state (in Volts).
VON	Control voltage for ON state (in Volts).

VCVS (Voltage Controlled Voltage Source)

Parameter Name	Description
Gain	Voltage gain.

VCVS_Expr (Voltage Controlled Voltage Source with an Arbitrary Expression)

Parameter Name	Description
Expression	Expression defining the source waveform.

VCVS_Poly (Voltage Controlled Voltage Source with SPICE POLY function)

Parameter Name	Description
Coefficients List	Polynomial coefficients.
Node Names	Set of controlling voltages.
Order	The number of dimensions of the polynomial. The number of pairs of controlling nodes must be equal to the number of dimensions.

VCVS_Table (Voltage Controlled Voltage Source with Table function)

Parameter Name	Description
Expression	Expression delivering the x-value, which is used to generate a corresponding y-value according to the tabulated value pairs, using linear interpolation.
Table	Value pairs.