SPICE Resistor
SPICE resistor.
Description
The SPICE Resistor unit is a resistor compatible with the SPICE model.
You can set the resistance in one of the following ways:
-
As a resistance value.
-
As information that the block uses to calculate the resistance value.
The block models the temperature dependence. There are two ways to set the resistor temperature:
-
If you select
Device temperaturefor the parameter Model temperature dependence using , the resistor temperature will be: , where-
- corresponds to the value of the Temperature parameter of the Environment Parameters block. If this block is not present in the circuit, the value of is set by default;
-
- corresponds to the value of parameter Offset local circuit temperature, TOFFSET.
-
-
If you select `Fixed temperature' for Model temperature dependence using, the resistor temperature corresponds to the value of Fixed circuit temperature, TFIXED.
The unit corrects the set or calculated resistance value for temperature using the following equation:
where
-
- is the set or calculated resistance value;
-
- corresponds to the First order temperature coefficient, TC1;
-
- corresponds to the Second order temperature coefficient, TC2;
-
- corresponds to the value of parameter Parameter extraction temperature, TMEAS.
Parameters
Resistance
# Device scale factor, SCALE — device scaling factor
Details
The number of parallel resistors in the unit. This value multiplies the output current.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Resistor parameterization —
parameterization settings
Use specified resistance | Calculate from process information
Details
Select one of the following options for specifying the resistor value:
-
Use specified resistance- specify the resistance value directly. -
Calculate from process information- specifies the parameters that the block uses to calculate the resistance value. In this case, the block calculates the resistance using the following equation:
where
-
- corresponds to the value of parameter Sheet resistance, RSH;
-
- corresponds to the value of the parameter Resistor length, LENGTH;
-
- corresponds to the value of the parameter Resistor width, WIDTH;
-
- corresponds to the value of the parameter Etch narrowing, NARROW.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
No |
#
Resistance, R —
resistance
Ohm | GOhm | MOhm | kOhm | mOhm
Details
Resistance value.
Dependencies
This parameter is used when Resistor parameterization is set to Use specified resistance.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Sheet resistance, RSH —
specific surface resistance
Ohm | GOhm | MOhm | kOhm | mOhm
Details
The specific surface resistance of a resistor.
Dependencies
This parameter is used when Resistor parameterization is set to Calculate from process information.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Resistor length, LENGTH —
resistor length
m | cm | ft | in | km | mi | mm | um | yd
Details
Resistor length.
Dependencies
This parameter is used when Resistor parameterization is set to Calculate from process information.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Resistor width, WIDTH —
resistor width
m | cm | ft | in | km | mi | mm | um | yd
Details
Resistor width.
Dependencies
This parameter is used when Resistor parameterization is set to Calculate from process information.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Etch narrowing, NARROW —
dressing narrowing
m | cm | ft | in | km | mi | mm | um | yd
Details
The amount by which the length and width of the resistor is reduced due to side etching.
Dependencies
This parameter is used when Resistor parameterization is set to Calculate from process information.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
Temperature
#
Model temperature dependence using —
temperature dependence adjustment
Device temperature | Fixed temperature
Details
Select one of the following options for modelling the temperature dependence of the resistor:
-
Device temperature- the device temperature is used, which corresponds to the value of the Temperature parameter and the value of the Offset local circuit temperature, TOFFSET parameter. -
Fixed temperature- for modelling the temperature dependence the temperature which does not depend on the circuit temperature is used.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
No |
#
First order temperature coefficient, TC1 —
first-order temperature coefficient
1/K | 1/degR | 1/deltaK | 1/deltadegC | 1/deltadegF | 1/deltadegR
Details
The coefficient for the linear term in the equation that the unit uses to adjust the setpoint or calculated resistance value for temperature.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Second order temperature coefficient, TC2 —
second-order temperature coefficient
1/K^2 | 1/degR^2 | 1/deltaK^2 | 1/deltadegC^2 | 1/deltadegF^2 | 1/deltadegR^2
Details
The coefficient for the quadratic term in the equation that the unit uses to adjust the setpoint or calculated resistance value for temperature.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Offset local circuit temperature, TOFFSET —
local circuit temperature offset
K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR
Details
The amount by which the resistor temperature differs from the circuit temperature.
Dependencies
This parameter is used if Model temperature dependence using is set to Device temperature.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Fixed circuit temperature, TFIXED —
fixed circuit temperature
K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR
Details
The temperature at which the resistor is modelled.
Dependencies
This parameter is only visible if the Model temperature dependence using parameter is set to Fixed temperature.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Parameter extraction temperature, TMEAS —
measuring temperature
K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR
Details
The temperature at which the resistor parameters were measured.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |