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Nexxim Simulator >
Nexxim Model Library >
   Global Device Options       


Global Device Options

Global device options affect all devices of a given type unless overridden by model and instance parameters. The order of precedence is: instance parameter > model parameter > global option.

In a netlist, all the options in Table 3 can be set on a .OPTIONS card. The syntax is:

.OPTIONS option[=val] ...

Some options are flags that do not have a value. They are enabled when they are present in the .OPTIONS card and disabled otherwise. An example is WL, which reverses the order of the width and length model parameters in a MOSFET instance or element statement.

In a schematic design, the DEVICE_CLEANUP option can be set by selecting Add Solution Options from the Circuit pulldown, then clicking on the General tab.

The global device options are summarized in Table 3:


Table 3: Nexxim Device Model Options

Option

Description

Used By

Default

DEVICE_CLEANUP

1 = delete zero-valued resistors, capacitors, and inductors

0 = do not delete (default)

Resistor, Capacitor, Inductor

0

GMAX

Maximum conductance used in NODESET calculations

Resistor

1.0

PARHIER

PARHIER=L reverses the precedence of parameter assignment in subcircuits

Subcircuits

Designer netlists insert PARHIER=LOCAL

RESMIN

Minimum resistance (positive or negative)

Resistor

If GMAX is defined, calculated from GMAX

Else: 1.0e-5

SCALE

Scaling multiplier for instance parameters. The parameters affected vary across model implementations.

Device Instances

1.0

SCALM

Multiplier for model parameter values. The parameters affected vary across model implementations.

MOSFETs

1.0

WL

Reverses the default order of width and length parameters on MOSFET instances

MOSFETs

Not set (default parameter order)


 




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