PDN - Target impedance

"One of the more common design techniques for power distribution networks (PDN) is the determination of the peak impedance that will assure that the voltage excursions on the power rail will be maintained within allowable limits, generally referred to as the target impedance. "

Full Article:
Target impedance based solutions for PDN may not provide realistic assessment | EDN: 

How-to-make-higher-voltage-power-distribution-network-measurements


PDN Tool V1:

Here is nice Java Script tool from EE- Training for PDN Calculations

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