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Yogesh Pai's blog

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Bode Plots on oscilloscope show control loop gain and phase versus frequency.
Measuring the Control Loop Response of a Power Supply with an Oscilloscope Tuesday, October 5, 2021
Power supplies and voltage regulators are typically designed to maintain a constant voltage over a particular current range. The supply should respond quickly to demand changes while maintaining a constant output, without excessive ringing or oscillation. To do this, power supplies are essentially amplifiers with a closed feedback loop. Control loop measurements help to measure how a power supply …