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LTSpice Current vs Voltage Graph


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One way is to do a Transient analysis, plot voltage across a component of interest, right-click the time axis of the plot, and edit the 'Quantity plotted' to read 'i(x)' instead of 'time', where x is the component.


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After running a sim, put the cursor over the component in question, and "right click". Works for any component, including sources.


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Below is a example simulation where the Horizontal axis is changed as shown (by left-clicking on the axis) and the Vertical axis, generated by left-clicking on D1 (not right-click as Mike stated) is changed to logarithmic so that the logarithmic relation between current and voltage of a diode appears as (nearly) a straight line:

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