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Ansoft Designer / Ansys Designer 在线帮助文档：

Nexxim Simulator >
Nexxim Transient Analysis >
   Running Transient Analysis from the Schematic Editor       

Running Transient Analysis from the Schematic Editor

From the Designer Schematic Editor, perform the following steps to set up and run a Nexxim transient analysis:

1. Right-click on the Analysis menu in the Project window to open a menu.

2. Select Add Nexxim Solution Setup from the menu, then slide the cursor to select Transient Analysis from the subordinate menu. The Transient Analysis dialog box appears.

3. Type an Analysis Name (or accept the default name, “NexximTransient”).

4. For most simulations, leave the Disable box unselected (the default setting). Selecting this box lets you store multiple solution setups for later use. (Note that if a solution setup is disabled before the analysis is run, any changes made to the design will invalidate the simulation results.)

5. Under Analysis Control, use the pulldowns to specify the Step time, the Stop time, and (optionally) the Accuracy level.

6. To add a sweep, locate the Sweep Variable area in the Transient Analysis dialog box.

•  In the Sweep Variable area, click Add, and the Add/Edit Sweep dialog box appears.

•  In the Variable list, select Temp or the name of a variable (when a variable has been defined for the design), and then select one of the following: Single value, Linear step, Linear count, Decade count, or Octave count.

•  Type the sweep values into the Value text box (for Single value), or into the Start, Stop, and Step text boxes (for Linear, Decade, or Octave count), and make sure that the appropriate units are selected for each.

•  For details on sweeps, see Variable Sweep.

•  Click Add, and then click OK to close the Add/Edit Sweep dialog box.

•  The Transient Analysis dialog box reappears.

7. Optionally, click the Edit button in the Output Quantities panel to open the Output dialog.

•  Use the checkboxes on the Output dialog to add net voltages and branch currents to the data generated by the transient analysis.

•  Click the OK button to add the selected output values and return to the Transient Analysis dialog.

8. Optionally, click the Enable Transient Noise box to activate the fields in the transient noise panel. Refer to the Transient Noise topic in the Netlist section for details on these fields.

9. Optionally, use the fields in the Solution Option panel to select or add Transient or DC analysis options and other Nexxim options to the design.

•  Click the Select button on the Name field to open the Select Solution Options dialog.

If any options sets have been defined, their names appear in the Select Solution Options list. To select a named option set that you have previously defined, click the name of the option set, then click OK to return to the Transient Analysis dialog. The named option set appears in the Name field in the Solution Options panel. See Analysis-Specific Options for details on creating option sets outside of the Solution Setup dialog.

To create a new option set, click New. The Solution Options dialog box appears. Use the Name field to name the new option set. Select the DC Options or Transient Options tab. Make the appropriate changes to option values, then click OK to return to the Select Solutions dialog box. On the Select Solutions dialog, click the name of the new option settings, then click OK to return to the Transient Analysis dialog. The name of the new option settings appears in the Name field in the Solution Options panel.

•  Click the Edit button on the Additional field to open a text-entry dialog, Edit additional options.

Use the text box to enter any Nexxim options exactly as they are to appear in the netlist. Do not include the keyword .OPTIONS; the .OPTIONS keyword is automatically inserted at the beginning of the line in the netlist statement.

The line can contain multiple options settings. Use spaces to separate the options settings.

To modify or delete an option once it has been added, just edit or delete its entry in the list.

To clear all options, delete the entire line.

Click OK to return to the Transient Analysis dialog.

The options in the Additional field are automatically added to the netlist when the solution containing them is performed.

•  For more information, see Nexxim Transient Analysis Options.

10. Run the simulation:

•  On the Circuit menu, click Analyze. If the circuit is set up correctly, the analysis begins immediately and a red progress bar appears.

•  The Message Window signals success or failure.

•  For details on creating and modifying reports, see Generating Reports and Postprocessing.

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