Measuring IC switching current waveforms using a GMI probe for power integrity studies

Switching currents in active integrated circuits (ICs) generate noise in the power distribution network (PDN), which is one of the main sources for many signal/power integrity and electromagnetic interference issues in high-speed electronic devices. Accurate knowledge of the switching currents is the key to ensure a good PDN design. This paper proposes a measurement methodology, when IC information is not available, to obtain the equivalent switching current of each IC in the case where multiple ICs are connected to a common power island structure. Time-domain oscilloscope measurements are used to capture the noise-voltage waveforms at a few locations in the power island. Combining with the multi-port frequency-domain S-parameter measurement among the same locations, an equivalent switching current for each IC is calculated. The proposed method is validated at a different location in the power island by comparing the calculated noise voltage using the equivalent switching currents as excitations with the actual measured noise voltage.

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Measuring IC switching current waveforms using a GMI probe for power integrity studies

Cited by 2 publications

References 7 publications

Improvements in GMI probe design for time-domain transient current measurements

Improvements in GMI probe design for time-domain transient current measurements

Switching-current measurement for multiple ICs sharing a common power island structure

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