Resistor (Variable) Model

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Modified by Phil Loughhead on Mar 4, 2014

Model Kind

General

Model Sub-Kind

Resistor(Variable)

SPICE Prefix

SPICE Netlist Template Format

@DESIGNATOR %1 %2 {@VALUE * @"SET POSITION"}

Parameters (definable at component level)

The following component-level parameters are definable for this model type and are listed on the Parameters tab of the Sim Model dialog. To access this dialog, simply double-click on the entry for the simulation model link in the Models region of the Component Properties dialog.

Value	value for the resistance (in Ohms).
Set 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 (i.e. the resistors' value will be half that specified in the Value field).

Examples

Consider the variable resistor in the image above, with the following characteristics:

Pin1 is connected to net Input
Pin2 is connected to net Inv
Designator is R1
Value = 1K
Set Position = 0.5

The entry in the SPICE netlist would be:

*Schematic Netlist: R1 INPUT INV 5E+2