AC Analysis

Select appropriate source to proceed with AC analysis. Place an appropriate source to proceed with AC analysis. Several are in the library tech_ngspice: drag from Explorer to place in schematic. For the rest: in the side-bar select Component tab, then schematic technology, and click an entry on the Spice component-menu (this is an electric built-in library named spicepartsS3), then click to place it in the schematic. Double-cilck the instance to edit properties. Here we used VSRC.ic from library tech_ngspice.
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Make sure voltage levels have proper values
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AC analysis component is present in the tech_ngspice library as dotAC.ic. Drag it from side-bar Explorer to place in a schematic.
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Double-click the instance to edit its properties.
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Click the SIM button on toolbar to write ngspice netlist and run the simulation. Launch symprobe on the output rawfile via toolbar wave button.
See also: Reuse View Analog Simulation results in symprobe; for an AC-Analysis, the Trace menu offers an easy way to plot Phase, Magnitude, and db20.

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