The speed and regulation stability of the control loop for a power supply’s fixed output voltage can be observed and assessed with a Bode plot. Here’s how it’s done.

In some cases, the control loop Bode plot can be extracted in a non-invasive manner, just by examining the regulator’s output impedance, as illustrated in Fig. 5.

Electrical engineers will recognize the Bode plot as a plot of the frequency response of a system. It displays the frequency on the x-axis and the phase (in degrees) or magnitude (in dB) on the y ...

In the 1930s Hendrik Wade Bode introduced a way to plot a linear system’s response to this sort of modulated, periodic signal.

One tool used in many descriptions and analysis is the Bode plot, Reference 1 . This graphical presentation shows the gain and phase relationship of a network or system.