.MODEL -- Define a SPICE Model

Defines a model for a diode, transistor, switch, lossy transmission line or uniform RC line

Some circuit elements, for example, transistors, have many parameters. Instead of defining every transistor parameter for every instance of a transistor, transistors are grouped by model name and have parameters in common. The transistors of the same model can have different sizes and the electrical behavior is scaled to the size of the instance.

Syntax: .model <modname> <type>[(<parameter list>)]

The parameter list depends on the type of model. Below is a list of model types:

TypeAssociated Circuit Element
SW Voltage Controlled Switch
CSW Current Controlled Switch
URC Uniform Distributed RC Line
LTRA Lossy Transmission Line
D Diode
NPN NPN Bipolar Transistor
PNP PNP Bipolar Transistor
NJF N-channel JFET model
PJF P-channel JFET model
NMOSN-channel MOSFET
PMOSP-channel MOSFET
NMF N-channel MESFET
PMF P-channel MESFET
NIGBTN-channel IGBT
PIGBTP-channel IGBT
VDMOSVertical Double Diffused Power MOSFET

See the description of the circuit element for a list of which parameters are instance specific and which are common to a model.