Models of Devices

A simulator model contains the physical and mathematical description for one type of circuit device. .MODEL statements in the netlist reference the simulator models. The general syntax for a .MODEL statement is:

.MODELmodelname type [model_parameters]

Each .MODEL statement provides a unique model name to be referenced by the instance statements for devices that use the given model. The type entry tells the kind of element, for example, D for diode model or NMOS for N-MOSFET model. The .MODEL statement can also specify values for physical and electrical parameters that then apply to all instances that reference that model name. Many device models have several different implementations identified via LEVEL and VERSION model parameters.

.MODEL MOS903 NMOS LEVEL=50 LER=1.92e-007 WER=1.00028e-005