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Ultrafast Impedance Measurement of Active Ultra-High Current PDNs

In this article, Steve Sander presents three viable solutions for measuring ultra-low impedance with a maximum of 10 ms, each of which can be performed using sophisticated and novel FFT based 3-port measurement. These methods involve applying digitally modulated patterns to create modulated load currents up to 1500 A and recording the resulting power rail voltage perturbations. 


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