The DC analysis calculates the DC Operating Point of a circuit as a function of an independent voltage or current source. The DC Sweep analysis generates output like that of a curve tracer. The analysis can be performed with one or two sources. If two sources are used then the value of the first source is varied throughout its range for each of the values assumed by the second source.
Sources
The dialog box has two identical sections in which to specify the sources and their range of variation. The first source must always be specified while the second source is optional. If two sources are used then the value of the first source is varied throughout its range for each of the values assumed by the second source.
Description
Enter a brief description of the type of analysis. The text entered is the title of the document in which the simulation results will be stored.
Temperature
Specify the temperature at which the simulation will be performed.
Analysis Mode
Specify whether a single or multiple analysis should be performed. The multiple analysis performs several consecutive simulations, varying the value of some parameters at each step. When a multiple analysis is selected, the Setup button is activated. Click on the button to activate the dialog in which to set the specific parameters for the selected analysis mode.
The following analysis modes are supported, click a link to learn more about that analysis mode:
Collect Data For
Specifying the simulation data to be collected. Simulations, especially multiple simulations, can produce a large amount of data, causing excessive memory usage and lower simulation speed. This section allows you to specify which information resulting from the simulation should be stored. Select one of the following options:
Voltages, Currents, Probes: Saves data for the voltage at each node and the current in each supply in addition to the signals specified via the Probe objects included in the schematic.
Voltages, Currents: Saves data for the voltage at each node and the current in each supply;
Signals specified by Probe objects: Stores only the signals specified via the Probe objects included in the schematic.
The specified signals: To reduce the amount of data stored during a simulation it may be convenient to specify the names of only the vectors of interest, in this case only the data relating to the specified vectors will be stored. When this option is selected, the Setup button is activated; click on the button to activate the Vectors dialog box in which to specify the names of the vectors.
Options
Click on this button to activate the dialog box in which to set the options of the simulator. The options set are only valid for the current analysis and replace those defined in the general tab of the simulator options.
Plot
Click on this button to activate the dialog box in which to set the diagrams and the list of vectors to be included in the diagrams. See the Plot dialog box.