This section of the tutorial explains the process of automatically outputting curves to separate grids. While there are several ways to interactively move curves to new grids on the waveform viewer (e.g.), these methods need to be run after every simulation. Instead of describing the interactive methods, this topic focuses on automatically making these measurements by adding the measurement definitions to the fixed probes.
In this topic:
This topic addresses the following key concepts:
In this section, you will learn to the following:
In the graph output from 3.3 Set up an AC Analysis, you had two tabs: simplis_pop1 VOUT (Y1) and simplis_ac1, these are the data groups created by SIMPLIS.
If you click on the simplis_pop tab, you should see three curves on one grid with two axes, as shown below.
Notice in the illustration above that the voltages are grouped on Y1 axis and the currents are on the Y2 axis since each physical unit requires its own axis.
With all three curves on one grid (VOUT in red, SW in green, and IL in blue), understanding the converter behavior and performance is difficult. For example, the 1.2V output voltage appears to be a flat line when plotted on the same axis as the SW waveform because the relative magnitude of the SW node waveform is much larger. It makes sense to split the waveforms onto multiple axes, or grids, so that the curves with similar amplitudes or functions are grouped together.
To separate the curves onto grids with one curve per grid, follow these steps:
To save your schematic, follow these steps:
A schematic saved at this state can be downloaded here: 7_SIMPLIS_tutorial_buck_converter.sxsch.
In the next section, you will change the order of the grids.