Implements the SPICE semiconductor resistor. The resistor model consists of process-related device data that allow the resistance to be calculated from geometric information and to be corrected for temperature.
Parameters
| Parameter | Description | Units | Default |
|---|---|---|---|
| L | Length of the resistor in meters. | m | |
| W | Width of the resistor in meters. If width is not specified, then it is taken from the default width (DEFW) given in the model. | m | |
| Model | Specify the model name. The model name can be omitted if the values of RSH and NARROW parameters are specified directly. | ||
| RSH | Sheet resistance. This value is used only if the model is not specified. | Ω/square | 0 |
| NARROW | Narrowing due to side etching. This value is used only if the model is not specified. | m | 0 |
| TC1 | First order temperature coefficient. This value is used only if the model is not specified. | Ω/°C | 0 |
| TC2 | Second order temperature coefficient. This value is used only if the model is not specified. | Ω/°C² | 0 |
| TEMP | Specifies the temperature at which the component operates. This value, if specified, takes precedence over the analysis temperature. This value is used only if the model is not specified. | °C |
Description
If model is not specified, then W and RSH must be specified.
If model is specified, then the resistance may be calculated from the process information (RSH and NARROW) in the model and the given L and W. If W is not specified, then it is taken from the default width (DEFW) given in the model.
The semiconductor resistor has a resistance computed as:
RTNOM = RSH·(L-NARROW)/(W-NARROW)
RTEMP = RTNOM·R·(1+TC1·(TEMP-TNOM)+TC2·(TEMP-TNOM)2)