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Andrew Zonenberg

Aaand here's what 1V0 looks like with a coaxial probe soldered directly across the bottom of the BGA.

Amazing what a difference you can get probing at a slightly different spot in the PDN.

The high frequency spikes are completely gone, 7.7 mV p-p and 1 mV RMS ripple. Still dominated by 125 MHz from the digital core of the PHYs.

Overview of the now much flatter looking 1V0 power rail
Closeup of the 125 MHz ripple
Jun 23, 2025, 08:33 AM·Public·Web
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