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.

Given this limitation, it would seem impossible to extract a Bode plot, however, consider the well-known relationship between the closed loop and open loop responses of a feedback system.

Bode plots – or frequency response graphs – are found in just about every piece of literature for high-end audio equipment. It’s a simple idea, graphing frequency over amplitude, … ...