Quantities Tab (Edit Component)

The Quantities tab lists the simulation parameters of the selected component. Parameter information displays for Value, Optimization, Tuning, Sensitivity, and Statistics by selecting the corresponding radio button. you can also add, edit, or remove properties.

Value

• Name – Displays the names of component parameters. Names can be edited for case only.
• Value – Change the initial values of parameters.
• Unit – Set the unit of measure for the parameter value.
• Netlist Unit – Set the unit of measure used when the parameter is netlisted.
• Description – Enter a description for the parameter.
• Callback – Associate a callback script with the parameter.
• Direction – Select the parameter direction (In, Out, InOut, or Don’t Care).
• Show Pin – Choose whether the parameter pin appears on a schematic.
• Default SDB – Enable the value to be stored in the project SDB.

When adding a quantity property, you must specify a Name and choose a Unit Type (angle, frequency, capacitance, and so on). Enter an initial value into the Value field. This can be a number, variable, or expression. Referenced project variables should be prefixed with a '$'. Examples: 22.4pF, $C1, 2*cos($x). If the value requires a multiplier unit (such as meg for “´1000000”) click the Units field to select the multiplier unit.

Optimization

Click Optimization to set default values for input parameters used in optimization analyses.

• Name – Displays the names of component parameters. Information in this column is read-only.
• Include – Use the parameter optimization settings.
• Nominal Value – Displays the value and unit currently set for the parameter. Information in this column is read-only.
• Min, Max, and Unit – Set the minimum and maximum values and their units. By default, the Min and Max values are set to plus and minus one-half the Nominal Value, and the Unit is the same as that of the Nominal Value.

Tuning

Click Tuning to set default values for input parameters used in tuning analyses.

• Name – Displays the names of component parameters. Information in this column is read-only.
• Include – Use the parameter optimization settings.
• Nominal Value – Displays the value and unit currently set for the parameter. Information in this column is read-only.
• Min, Max, and Unit – Set the minimum and maximum values and their units (the range over which tuning will occur). By default, the Min and Max values are set to the values from the optimization settings.
• Step and Unit – Set the size of the step for successive tuning iterations in the tuning range. By default, these values are set to 10 percent of the parameter’s Nominal Value.

Sensitivity

Click Sensitivity to set default values for input parameters used in sensitivity analyses.

• Name – Displays the names of component parameters. Information in this column is read-only.
• Include – Use the parameter optimization settings.
• Nominal Value – Displays the value and unit currently set for the parameter. Information in this column is read-only.
• Min, Max, and Unit – Set the minimum and maximum values and their units (the range over which tuning will occur). By default, the Min and Max values are set to the values from the optimization settings.
• Initial Disp. and Unit – Set the initial displacement value. The initial displacement is the difference between the starting value and the next solved design variation. During a sensitivity analysis, Optimetrics will not consider an initial value that is greater than this step size away from the starting variable value. By default, these values are set to the parameter’s Step value.

Statistics

Click Statistics to set default values for input parameters used in statistical analyses.

• Name – Displays the names of component parameters. Information in this column is read-only.
• Include – Use the parameter optimization settings.
• Nominal Value – Displays the value and unit currently set for the parameter. Information in this column is read-only.
• Distribution – Click in the Distribution column and select Uniform, Gaussian, Lognormal, or User Defined.
• Distribution Criteria – Opens the Edit Distribution dialog box, in which you can set criteria appropriate for the chosen Distribution type.