Potentiometer Model
Model Kind
General
Model Sub-Kind
Potentiometer
SPICE Prefix
R
SPICE Netlist Template Format
@"DESIGNATOR"A %1 %2 {@VALUE * @"SET POSITION"}
@"DESIGNATOR"B %2 %3 {@VALUE - (@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, with equal resistance on both sides. |
Examples
Consider the potentiometer in the image above, with the following characteristics:
- Pin1 (Top) is connected to net
OUT - Pin2 (Bot) is connected to net
IN - Pin3 (Tap or wiper) is connected to net
IN - Designator is
RIn - Value =
1K - Set Position =
0.5
The entry in the SPICE netlist would be:
*Schematic Netlist:
RInA OUT IN {1K * 0.5}
RInB IN IN {1K - (1K * 0.5)}