DC Analysis, 1-D Sweep

1. DC 1-D Sweepcomponent for ngspice can be found in the electric side-bar, Explorer tab, library tech_ngspice, dotDC_1D. Drag and drop it to add it to the schematic.
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2.Double-click or Ctrl+i the instance to edit the parameters.
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3.In the indep_source_name field: For a temperature sweep, enter TEMP.
For a voltage sweep, take the instance-name of a placed voltage-source and prefix it with “v”.
For a current sweep, take the instance-name of a placed current-source and prefix it with “i”.

In example below, the placed tech_ngspice:VDC instance-name is “VDS”, so we set indep_source_name=”vVDS”.
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4. Do check if AnalysisProcessCorners is present in the circuit before proceeding to simulate using toolbar SIM button.
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5. You can view the results of the simulation in the log file via the toolbar LOG button.

Note, results of simple .meas statements will be saved to *.log.m files, which are not opened by the LOG button (use a terminal: change directory to ~//ngspice/run//).

To place simple .meas statements in a schematic: in side-bar, open component-menu Misc. (in tech=schematic) and click “Spice Code” then click in schematic to place it. Double-click it to edit properties and add multiple lines of spice control statements. (This is an electric built-in specific type of “text-annotation”. If you place multiple of them, don’t expect to control or rely on their relative order in the netlist).
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