Schematics can be configured much like real-world circuits. When they are finished, their operation can be simulated.

Creating schematics

Each project comes preconfigured with an empty schematic. To create additional or replacement schematics, select the project in which the schematic is needed in the Workspace view and click the button in the toolbar. For details, see Creating a new schematic.

Instead of creating an empty schematic, you can also create a duplicate of an existing schematic by right-clicking it and choosing Copy from the context menu.

In the same way, you can copy a schematic from another project. To do so, right-click it in the project in which it already exists, choose Copy from the context menu, and specify the new project as the target.

Populating a schematic

To edit a schematic, right-click it in the Workspace view and choose Open in Schematic Editor from the context menu. This displays the schematic in a separate tab in the center of the main program window.

You can add all types of components to a schematic by right-clicking them in the Model Libraries view and choosing Place or by double-clicking them. This causes an outline of the component to appear under mouse when you move the mouse over the schematic tab. Click to place a copy of the selected component; press Esc to stop placing this type of component. Clicking the right mouse button before placing a component rotates it 90° counterclockwise without placing it.

Basic components are also available in the toolbar, along with wires and solder dots:



The Current Source () and Voltage Source () tools let you choose between several different types of sources.

Note: We recommend that you place the terminals of the components on the grid (the gray dots in the background of a schematic tab) to help with proper wiring.

When you have inserted a component, right-click it and choose Properties from the context menu. This opens the Properties dialog where you can specify the name and parameters for the component. Mandatory fields are highlighted in yellow. Definitions of the parameters are available by hovering the mouse pointer over the parameter's label. You can enter numbers in standard notation (for example, 1000), scientific notation (1e3) or using SI-like prefix letters (1k). You can also use expressions, with or without parameters. For details, see Values and expressions.

To connect components, use wires ( or ) between the components' connectors. Do not use lines () for this purpose, they are ignored by the simulation. When wires cross, solder dots are placed automatically. To add solder dots on connections where they have not been created automatically, use the Solder Dot tool (). To remove a solder dot, drag one of the wires away from the crossing using the Select Mode () tool.

You can also use the Select Mode also to reposition components and wires.

To delete components or wires, select them (using the Select Mode tool) and press the Del key or right-click them and choose Delete from the context menu.

Annotating a schematic

To annotate a schematic, you can:

  • Add a name to a wire using the Wire Name tool (). Note that two wires with the same name are connected internally in the netlist, even if they have no connection in the graphic of the schematic.

  • Change the label of a placed component by entering the desired label in the Name field in its Properties dialog.

  • Add any desired text in any location using the Text tool ().

    You can change the font, size, color, alignment, and rotation of placed text in the Text dialog, which you can open by selecting the, right-clicking it, and choosing Properties from the context menu.

  • Add lines and rectangles using the Line () and Rectangle () tools.

    You can change the line styles, colors, and (for rectangles) fill styles in the Properties dialog. You can rotate lines and rectangles using the Rotate tool ().

Except potentially for the names of the wires, these annotations have no effect on the electrical properties of the schematic or the results of the simulation.

Editing read-only schematics

The Infineon libraries that are shown in the Model Libraries view contain (in addition to components) schematics. These schematics are read-only, that it, you cannot edit the versions in the library. You may also encounter read-only libraries in other cases.

While you cannot edit these schematics in place, you can still create copies of them that you can modify. To do so, copy the schematic you want to modify to a new or existing project by right-clicking it and choosing Copy to New Project or Copy to Existing Project, respectively, from the context menu. In the Workspace view, open the copy of the schematic in the project folder and edit is as you would any other schematic.