Named after Bell Lab’s [Hendrik Wade Bode], they are useful for understanding filters or anything with a frequency response. Of particular interest are the zeros and poles of the graph.

Putting this method into practice, the Bode plot is extracted from an LM317 regulator with a 100uF tantalum output capacitor, operating at 25mA load current.

The two charts of a Bode diagram (the log of gain or magnitude, and phase plots) visually reveal these distortions.

The graph shown in the Bode plot (Figure 2) represents the gain as a function of frequency. A time domain window is displayed simultaneously in the upper part of the screen, showing both the injected ...