How To Measure Ultra-Low Impedances

This is the test setup for the two-port S21 shunt-through method using the OMICRON Lab Bode 100 with the Picotest J2102A common-mode transformer.

Maintaining clean, regulated voltage requires more than a high-quality power supply. The power distribution network (PDN)—which, together with the power supply itself, form the power system—must maintain a low source impedance, with minimal resistance and well-controlled reactive elements.

Designers can validate impedance performance by measuring the impedance with a network analyzer.

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