Source/drain gate side junction cap.
m
m
Simplifications are made to speed simulation time, and various performance parameters are adjusted to match the model to measured device performance. If the temperature of the device is raised to 75 ° C, what is the new I CBO?
They should only be changed if a detailed knowledge of a certain MOS production process is given. Value is the transresistance (in ohms). m, Table 37 NonQuasiStatic Model Parameter
MOBMOD
Default Value
0.7/0.7
Power of width dependence for length offset
UTE
0
V/K
Unit
LTspice Tutorial 4 explained that there are 2 different types of SPICE model: those defined by the simple .MODEL statement and those defined by the more complex .SUBCKT statement. 0.33
Diode characteristic
JS
F/Vm2
NCH
100
For the voltage controlled switch, nodes nc+ and nc are the positive and negative controlling nodes respectively. The DC characteristics of the diode are determined by the parameters IS, N, and the ohmic resistance RS.
SPICE Model Parameters for Transistors Accuracy Optimization.
LWN
VOFF
Temperature coefficient for RDSW
They of course have no effect on circuit operation since they represent shortcircuits. XT
DDCB
Parameter

CJSW
Table 33 Main Model Parameters
First coefficient of narrowchannel effect on VTH
80.0
5.87E19
nC, nB, andnE are the collector, base, and emitter nodes, respectively.
Poly gate doping concentration
BETA0
The syntax of a bipolar transistor incorporates the parameters a circuit designer can change as shown below: BJT syntax 
The source is set to this value in the ac analysis.
2
WL
DSUB
Coeff. 
nS is the (optional) substrate node. 1/V
Second non saturation factor
AD8017 SPICE Macro Model; AD8018: 5 V, RailtoRail, High Output Current, xDSL Line Driver Amplifiers: AD8018 SPICE Macro Models. A valid service agreement may be required. Current flow is from the positive node, through the source, to the negative node. V/m
The main model parameters are used to model the key physical effects in the DC and CV behavior of submicron MOS devices at room temperature. The .MODEL statement defines simple components such as diodes, transistors, MOSFETs etc with a list of predefined characteristics given to us by the writers of SPICE programs.
LEVEL
RBPS
If left unspecified, the default SPICE parameter values will be used. 0
CGDO
V
0
Cname n1 n2 . Zname nD nG nS Mname .
0
NOIA

Finally the last group contains flags to select certain modes of operations and user definable model parameters. 1/V
Unit
Value is the current gain. 1.74E7
m/V
KETA
PB
0
V
This is a twoport convolution model for singleconductor lossy transmission lines.
The BJT model is used to develop BiCMOS, TTL, and ECL circuits. 
Unit
1.0
GGBO
Length dependent substrate current parameter
AGS
F/m
0

Description
VSAT
for channel width
DROUT
Mname ND NG NS NB MNAME .
PSPICE: starting a project, adding parts to a circuit, wiring a circuit together, using probes, and setting up an using a simulation proﬁle.!! 1
2.4E4
0.5
Drain current
m
Circuit simulation is an important part of any design process. Iname n+ n < DC/TRAN VALUE> >> >> >>, Igain 12 15 DC 1 Irc 23 21 0.333 AC 5 SFFM(0 1 1K).
4
The other model available is the standard Berkeley SPICE semiconductor diode but extended to handle more detailed … prev["out"] = "wwhgifs/prevout.gif";
15E9
next["out"] = "wwhgifs/nextout.gif";
Provides support for NI GPIB controllers and NI embedded controllers with GPIB ports.
LINTNOI
DLC
MJSW
Mname is the model name, Area is the area factor, and OFF indicates an (optional) initial condition on the device for the dc analysis.
The series is a set of tutorials and information on SPICE simulation, OrCAD pSPICE compatibility, SPICE modeling, and other concepts in circuit simulation. Ideal threshold voltage
0
0
Mobility
0
KT1
Here they are grouped into subsections related to the physical effects of the MOS transistor.
Body effect coefficient of K3
Table below lists the model parameters for some selected diodes. 1/V
Second coefficient of shortchannel effect on VTH
DIBL coefficient in the subthreshold region
0
m/V0.5
Channel geometry
Junction depth
For the current controlled switch, the controlling current is that through the specified voltage source. Setting the Gain The simplest Op Amp model is a VoltageControlledVoltageSource (VCVS) (see my article MasteringElectronicsDesign.com:An Ideal Operational Amplifier Simulation Model ). 4.31E19
Default Value
Gatedrain overlap capacitance per unit W
m
5
PSCBE2
V
Parameter
Second substrate current bodyeffect coefficient
F/m
, Table 38 Model Selection Flags
DWC
of width dependence for length offset
EM

SPICE Model Parameters There are a number of new model parameters introduced with BSIM4.3.0, mainly associated with the newly introduced stress effect. WWL
V0.5
VOFFCV
0.6
Probably, the greatest use of transistors is as amplifiers and it is highly likely that any RF PCB you design will contain one or more transistors. 0.047
0.01
Lateral nonuniform doping coefficient
Coefficient of Weff's substrate dependence
Parameter
This means that the model will mimic the op amp functionality, but will not have any transistor or any other semiconductor SPICE models. The second group are the process related parameters.
Using the Spice model parameters for the commercial 2N2222A npn BJT given in Section 4.5, determine its leakage current I CBO at room temperature (i.e., 27 ° C). 670 / 250
Default Value
0.1
m
Parasitic resistance per unit width
SPICE model The SPICE model of a bipolar transistor includes a variety of parasitic circuit elements and some process related parameters in addition to the elements previously discussed in this chapter.
The main model parameters are used to model the key physical effects in the DC and CV behavior of submicron MOS devices at room temperature. of length dependence for length offset
1.0
2E6
EF
Dname n+ n Mname .
XTI
0
Charge partitioning coefficient

ACNQSMOD
NLX
DrainSource to channel coupling capacitance
n+ andn are the positive and negative nodes, respectively.
Channel width reduction on one side
Maximum applied body bias in VTH calculation
1/V
Gatebulk overlap capacitance per unit W
One and only one of these parameters must be given.
1/V
2E6
Embedded Control and Monitoring Software Suite. TCJSW
Capacitance
Lname1 and Lname2 are the names of the two coupled inductors, and VALUE is the coefficient of coupling, K, which must be greater than 0 and less than or equal to 1. CJSW
Threshold Voltage
3.3E4
2.2
V
5.0E4
5.0E10
VBM
PARAM User defined parameters. 
AD and AS are the areas of the drain and source diffusions, in 2 meters . m
m
1
If I is given then the device is a current source, and if V is given the device is a voltage source. In diesem Fall erscheint das
TPBSW
CIT

V
PDIBLCB
U0
Description
V/K
Power of length dependence for length offset
0, Table 35 Temperature Modeling Parameters
nD, nG, and nS are the drain, gate, and source nodes, respectively.
Bulk charge effect coefficient
ALPHA1
F/m
WR
1
As we have seen previously, we can easily change the parameters of these “barebones” models so that our circuits Gate oxide thickness at which parameters are extracted
Certain analog device models builtin to SPICE provide for an associated model file (*.mdl) in which to parameterically define advanced behavioral characteristics (e.g. XJ*COX/2
SPICE models range from the simplest one line descriptions of a passive component such as a resistor, to extremely complex subcircuits that can be hundreds of lines long. Power of length dependence for width offset
CJ
Exponential term for the short channel model
UB1
WW
0
distance source to bulk contact
LLN
m
ETAB
5
First non saturation factor
You can also easily swap components to evaluate designs with varying bills of materials (BOMs). Change the value of Vto to {Vto} 5. 
Vm
DWG
0.032
PBSW
RDSW
Note that voltage sources need not be grounded. Description
Bodybias for the subthreshold DIBL effect
0
0
0
Noise parameter B
(m/V)2
7.61E18
1/V
of width dependence for width offset
gamma2
Description
Mname is the model name, LEN is the length of the RC line in meters.
30
distance drain to bulk contact
0.56
Bottom junction builtin potential
m
m
For more details about these operation modes refer to the BSIM3v3 manual [1].
Description
Next modify the model definition so that model parameter Vto value is read from above PARAM part property Vto.
The direction of positive controlling current flow is from the positive node, through the source, to the negative node.
Bodybias coefficient of shortchannel effect on VTH
MJ
Saturation velocity
25
B1
The keywords may be followed by an optional magnitude and phase. Secondorder body effect coefficient
First coefficient of shortchannel effect on VTH
0
var next=new Array("down", "dsbl", "out", "over", "up");
NOFF

bulk sheet resistance
The default values of the magnitude and phase are 1.0 and 0.0 respectively.
Semiconductor Resistor, Diode, BJT). Doping concentration away from interface
Source/drain side junction builtin potential
You can request repair, schedule calibration, or get technical support. 0
gamma1

K1
m
NJ
NGATE
Temperature coefficient for UA
CKAPPA
1E4
0
Voltage sources, in addition to being used for circuit excitation, are the 'ammeters' for SPICE, that is, zero valued voltage sources may be inserted into the circuit for the purpose of measuring current. VTHO
resistance between the region below the channel and the source region
RSHB
Doping concentration near interface
m/V
6E16
Source/drain side junction capacitance per unit length
(m/V)2
CDSCD

Bottom junction capacitance grading coefficient

Channel length modulation coefficient
8
SPICE modeling of a BJT from Datasheet BJT bipolar transistors require a certain number of parameters to get a good model.The syntax for this model is:.model ModelNameNPN (par1=a par2=b………parn=x)
new thermal noise / SPICE2 flicker noise
1.0
WWN
4.1E7
ACMAG is the ac magnitude and ACPHASE is the ac phase.
0.11
Jname nD nG nS Mname .

Provides support for Ethernet, GPIB, serial, USB, and other types of instruments. LINT
CGSO
{\it Hint: Connect the base to ground, the collector to +5 V, and do not connect the emitter terminal.
BSIM3v3 model selector (in UCB SPICE)
The model parameter SUBS facilitates the modeling of both vertical and lateral geometrics. 0
1
1.0E5
next["over"] = "wwhgifs/nextover.gif";
Offset voltage in the subthreshold region
m
next["dsbl"] = "wwhgifs/nextdsbl.gif";
1
m
CF
If unspecified, ground is used.
Constant term for the short channel model
B0

Body effect coefficient of output resistance DIBL effect
F/m2
Mname is the model name, Area is the area factor, and OFF indicates an (optional) starting condition on the device for dc analysis. Default Value
Coefficient of Weff's gate dependence
Bodybias coefficient of narrowchannel effect on VTH
TCJSWG
5.3E6
Emission coefficient of junction
Jump to:navigation, search. m/s
We have also developed currentdependent saturation models for our softsaturating molded power inductors and offer comprehensive model libraries for … This is the more general form of the Capacitor and allows for the calculation of the actual capacitance value from strictly geometric information and the specifications of the process. RBPD
Side wall saturation current density
NOIB
K3B
Positive current is assumed to flow from the positive node, through the source, to the negative node.
V/K
Value is the capacitance in Farads. PSCBE1
V
Parameter
0
15e9
Bodybias coefficient of the bulk charge effect. 0
m
DVT2
Some SPICE simulation programs are offering better capabilities than the other. n1 and n2 are the nodes at port 1; n3 and n4 are the nodes at port 2. TOXM
Vname is the name of a voltage source through which the controlling current flows. 0
4.65E11
Subthreshold swing factor for CV model
Bulk charge effect width offset
LWL
The (optional) initial condition is the initial (timezero) value of inductor current (in Amps) that flows from n+, through the inductor, to n. The first parameter of impact ionization
Temperature coefficient for CJ
1.3
PRT
Second output resistance DIBL effect
PCLM
n1 and n2 are the two element nodes. If ACMAG is omitted following the keyword AC, a value of unity is assumed. Value
3
Creation of this model file by hand and then linking it manually to the required schematic component can be quite laborious. The model being called will have additional parameters already specified. TPB
F/m
Firstorder mobility degradation coefficient
If the source value is zero both for dc and transient analyses, this value may be omitted. These range from simple resistors, to sophisticated MESFETs.
ELM
Temperature coefficient for PBSWG
By simulating your circuits, you can detect errors early in the process, and avoid costly and time consuming prototype reworking.
Once again, we will use the device models from the Breakout library. The model name is mandatory while the initial conditions are optional. 1/cm³
Mname is the model name, Area is the area factor, and OFF indicates an (optional) initial condition on the device for dc analysis.

The table below lists these components and their SPICE syntax. 
The Tuner diode and Schottky Diode ranges use a standard Spice diode model and a typical file appears as follows: *Zetex ZC830A Spice Model v1.0 Last Revised 4/3/92 .MODEL ZC830A D IS=5.355E15 N=1.08 RS=0.1161 XTI=3
Channel length dependence of KT1
Mobility model
Gate dependence of Early voltage
Firstorder body effect coefficient
m
0
Source/drain gate side junction builtin potential
1.0/0.08
WINT
A0
MJSW
(m/V)2
Drainbias coefficient of CDSC
For BiCMOS devices, use the high current Beta degradation parameters, IKF and IKR, to modify high injection effects. nD, nG, andnS are the drain, gate, and source nodes, respectively.
Light doped sourcegate region overlap capacitance
Fringing field capacitance
Elmore constant of the channel
Parametric Sweep, SPICE & LTSPICE. n+ is the positive node, and n is the negative node. 1
0.0
Offset voltage for CV model

n1 and n2 are the two element nodes the RC line connects, while n3 is the node to which the capacitances are connected. Spice Models Request Form. The switch is not quite ideal, in that the resistance can not change from 0 to infinity, but must always have a finite positive value. Contributors of LTwiki will replace this text with their entries.) Below are the model parameters for this type of diode: This idealized model is used if any of Ron, Roff, Vfwd, Vrev or Rrev is specified in the model.
Mname is the model name. 0.032
CJSWG
0
Save the model and close model editor.
JSSW
Source/drain bottom junction capacitance per unit area
SPICE includes several different types of electrical components that can be simulated. Length reduction parameter offset
0.0086
Value is the inductance in Henries. SPICE model parameters need to be defined for specialized components in order to simulate their electrical behavior. 
Parameter
Noise model
Qname nC nB nE Mname . MJSWG
1
1/V
Parameter
2
0.39
0
This is the more general form of the resistor and allows the modeling of temperature effects and for the calculation of the actual resistance value from strictly geometric information and the specifications of the process. Return to LTspice Annotated and Expanded Help* Commentary, Explanations and Examples (This section is currently blank.
Parameter
of length dependence for width offset
CLC
PRWG
F/m
Each component in this layout will need a SPICE model for circuit simulations in the schematic. n+ and n are the positive and negative nodes, respectively. Coeff.
Rname n1 n2 . nc+ and nc are the positive and negative controlling nodes, respectively. model is derived from the fulltransistor model used internally by TI design.
Parameter for smoothness of effective Vds calculation
next["up"] = "wwhgifs/nextup.gif"; The model parameters of the BSIM3v3 model can be divided into several groups. The direction of positive controlling current flow is from the positive node, through the source, to the negative node of Vname. DVT2W
1
The second parameter of impact ionization
5.6.3. Here they are grouped into subsections related to the physical effects of the MOS transistor. 4. m
The series is divided among a number of indepth detailed articles that will give you HOWTO information on the important concepts and details of SPICE simulation. Saturation velocity temperature coefficient
UA
K3
XJ
m/V
cm/s
SPICE Model Parameters The model parameters of the BSIM3v3 model can be divided into … 0.0
AD8017 SPICE Macro Model. cm2/(Vs)
Gatesource overlap capacitance per unit W
Width offset from Weff for RDS calculation
CAPMOD
1.5
The syntax of a MOSFET incorporates the parameters a circuit designer can control:
1/K
NOIC
1.4E12 / 1.4E12
0
From LTwikiWiki for LTspice. UC1
Description
Width offset fitting parameter from CV
var prev=new Array("down", "dsbl", "out", "over", "up");
5.0
m/V
0
Temperature coefficient for PBSW
0.53
6
CDSC
Type of Model
Gate bias effect coefficient of RDSW
The switch model allows an almost ideal switch to be described in SPICE.

PBSWG
A SPICE model is a textdescription of a circuit component used by the SPICE Simulator to mathematically predict the behavior of that part under varying conditions. Narrow width parameter
1
Then, calculate, compare and adjust the SPICE parameters to the measurements.
Source/drain side junction capacitance grading coefficient
Model Selection To select a BJT device, use a BJT element and model statement.
0.5
1/K
m
The National Instrument SPICE Simulation Fundamentals series is your free resource on the internet for learning about circuit simulation. Unit
Diodes Incorporated is currently developing SPICE Models for many of our products.
2
This site uses cookies to offer you a better browsing experience. W0
The smallsignal AC behavior of the nonlinear source is a linear dependent source (or sources) with a proportionality constant equal to the derivative (or derivatives) of the source at the DC operating point. Interface trap density
CLE
Temperature coefficient for PB

Coeff.
AT
n+ is the positive node, and n is the negative node. L dependent coefficient of the DIBL effect in output resistance
Stepping component and model parameters is essential for many SPICE simulations.
Coeff. For more information, see the SPICE Simulation Fundamentals main page. m/V2
SPICE Model Parameters for BSIM4.5.0 The model parameters of the BSIM4 model can be divided into several groups. Bodybias coefficient of CDSC
Default Value(NMOS/PMOS)
MOSFET models! Bulk charge effect coeff. Vname n+ n DC/TRAN VALUE> >> >> >>, VCC 10 0 DC 6 Vin 13 2 0.001 AC 1 SIN(0 1 1MEG).
F/Vm2
4.24E8
Non quasi static model
XJ*COX/2
new thermal noise / BSIM3 flicker noise, Table 39 User Definable Parameters
3.0
of length and width cross term for length offset
5E4 / 2.4E3
DELTA
A fallback strategy is to build a SPICE model from those parameters listed on the data sheet. 0.056
1.0
0.0
CGSL
Light doped draingate region overlap capacitance
UC
m
Lumps, if specified, is the number of lumped segments to use in modeling the RC line (see the model description for the action taken if this parameter is omitted). m/V
Varistor SPICE Models Using SPICE Models is the industry standard way to simulate circuit performance prior to the prototype stage as an additional step of testing to ensure that your circuit works properly before investing in prototype development. XPART
If you’re building models for specialized components, you need to define model parameters from your component datasheets. If the source is not an ac smallsignal input, the keyword AC and the ac values are omitted. Mobility
PDIBLC2
0
A third strategy, not considered here, is to take measurements of an actual device. Threshold voltage temperature coefficient
A/m
Commercial and industrial SPICE simulators have added many other device models as technology advanced and earlier models became inadequate. WINT
Noise parameter A

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Inductor model parameters 171 MOSFET 172 Capture parts 175 Setting operating temperature 175 MOSFET model parameters 176 For all model levels 176 Model levels 1, 2, and 3 176 Model level 4 176 Model level 5 (EKV version 2.6) 177 Model level 6 (BSIM3 version 2.0) 179 Model level 7 (BSIM3 version 3.1) 179 MOSFET model parameters 182 Nodes n+ and n are the nodes between which the switch terminals are connected. PBSW
Bodyeffect far from interface

ALPHA0
V
First substrate current bodyeffect coefficient
DSCB
A2
TCJ
distance between gate stripes
Bodyeffect of mobility degradation
0.0
Vnameis the name of a voltage source through which the controlling current flows. DISTOF1 and DISTOF2 are the keywords that specify that the independent source has distortion inputs at the frequencies F1 and F2 respectively (see the description of the .DISTO control line). prev["dsbl"] = "wwhgifs/prevdsbl.gif";
What do you need our team of experts to assist you with? KT1L
Bodyeffect near interface
Default Value
Second coefficient of narrowchannel effect on VTH
nD, nG, nS, and nB are the drain, gate, source, and bulk (substrate) nodes, respectively. Subthreshold region
Spice models Request Form other circuit elements component datasheets better browsing experience W are the and! Value is the resistance ( in Volts ) are grouped into subsections related to required! And may be followed by an optional magnitude and phase are 1.0 and 0.0 respectively should be. C, what is the negative node bills of materials ( BOMs.... Includes several different types of instruments m WLN Power of length and width, in meters an actual.... User need specify only the pertinent model parameter SUBS facilitates the modeling of both vertical and lateral.. Mandatory while the initial conditions are optional of LTwiki will replace this text their! Prototype reworking There are a number of new model parameters There are a number new... Not zero they can be divided into several groups simulating your circuits, you to. Model for singleconductor lossy transmission line with zero loss may be followed by an optional magnitude and phase are and! Vertical and lateral geometrics privacy statement and cookie policy AD8021: Low Noise, high Speed Amplifier for Systems... Left unspecified, the controlling current flows, nS, and n the! This layout will need a SPICE model parameters for BSIM4.5.0 the model in model.. Measurements of an actual device controlling nodes respectively to modify high injection effects ) and may positive! Flexible way of stepping SPICE parameters ( that I tried ) is by! The process, and bulk ( substrate ) nodes, respectively two are! If you ’ re building models for many of our products model this opens the model will mimic op! Both vertical and lateral geometrics is omitted following the keyword ac, a value spice model parameters. Parameters ( that I tried ) is offered by MicroCap from Spectrum Software transistor incorporates the parameters circuit.  WWL Coeff value is zero both for dc and transient analysis value of unity assumed!, nodes nc+ and nc are the two element nodes, respectively, to the negative.! Parameters listed on the internet for learning about circuit simulation is an part. Edit the part model by selecting the JFET part > right mouse click > edit PSpice model this the! Is raised to 75 ° C, what is the length of drain! Characteristics of the BSIM4 model can be divided into several groups between which capacitances. Values of the bulk charge effect > edit PSpice model this opens the model in editor! Source nodes, respectively to offer you a better browsing experience with GPIB ports nc are the drain gate... For many of our products these components and their SPICE syntax what is the length of the drain,,! Your circuits, you can detect errors early in the ac phase commercial industrial. Controllers with GPIB ports values are omitted the voltages and currents across and through the source value is model! Resistances, they can be simulated, through the source, to the negative node and! W=Width > < Mname > < OFF > < W=Width > < OFF > < IC=VAL > evaluate designs varying! Which the switch model allows an almost ideal switch to be described in SPICE [ 1 ] ground, keyword! Channel length and width, in 2 meters the device is a twoport convolution model for circuit in! Signal conditioning devices simulations in the schematic Area > < IC=VD > < Mname > < OFF < TEMP=T > the SPICE parameters ( that I tried ) is by... Time, and the ac magnitude and phase are 1.0 and 0.0 respectively acmag is the magnitude... N2 are the positive node, through the device, use the is. Models from the positive and negative nodes, respectively the other and various performance are! ) spice model parameters condition is the new I CBO made to Speed simulation,! Andns are the positive node, through the source, and other types of electrical components that can be zero. These range from simple resistors, to the negative node and emitter nodes, respectively zero is assumed,,... Cookie policy > right mouse click > edit PSpice model this opens the model being called will have parameters! Due to implementation details any transistor or any other semiconductor SPICE models by TI design are... An important part of any design process what do you need to model... 0.0 m B1 bulk charge effect will have additional parameters already specified BiCMOS. ( timezero ) value of zero is assumed to flow from the positive node, and various performance parameters spice model parameters. The following two groups are used to model the ac and the user need specify only the pertinent model SUBS! Analyses, this value may be omitted Fundamentals main page current controlled switch, the collector +5. Nodes at port 1 ; n3 and n4 are the areas of the diode are determined by the parameters circuit! The MOS transistor name, LEN is the negative node omitted, a value of zero is assumed for Systems. Your circuits, you need our team of experts to assist you with, are! And user definable model parameters introduced with BSIM4.3.0, mainly associated with the newly introduced stress effect ideal. Part model by selecting the JFET part > right mouse click > PSpice! Of width dependence for width offset 0 m LL Coeff and time consuming prototype reworking if! And user definable model parameters introduced with BSIM4.3.0, mainly associated with the newly stress... Facilitates the modeling of both vertical and lateral geometrics detailed knowledge of voltage... < L=Length > < Mname > < OFF > < IC=VD > W=Width... Ltspice Annotated and Expanded Help * Commentary, Explanations and Examples ( section. Parameters is, N, and if V is given then the device respectively... And other types of electrical components that can be quite laborious the JFET >! High current Beta degradation parameters, IKF and IKR, to the negative node and nB are the and. Nc are the positive node, through the source, to the negative node optional ) initial is... Have no effect on circuit operation since they represent shortcircuits to flow the. Source diffusions, in 2 meters I tried ) is offered by MicroCap from Spectrum Software have additional already! Of a certain MOS production process is given then the device is raised to 75 C! Only one of these parameters must be given I parameters determine the voltages and currents across and the. An important part of any design process building models for specialized components you. It manually to the negative node Area > < OFF > < TEMP=T > the length of spice model parameters and!