SI/PI Technical Session

Partial Inductance – The Secret to Correlating Simulation and Measurement


Eastern Time August 25, 2021 2:30 pm - 3:00 pm

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Benjamin Dannan
Steven Sandler

There’s confusion about the measurement of capacitors, and particularly the series inductance or ESL. Different manufacturers calibrate or de-embed their measurement differently, making it difficult to compare one vendor to another. The differences between these measurements represent different locations of the measurement reference plane.

When correlating EM simulation and measurement results, where should the reference plane be for the capacitor measurement? Why does the target impedance measurement show much higher inductance than the simulator? Why do some experts recommend measuring impedance from both sides of the PCB and not just one side? In this session, Steve Sandler, Heidi Barnes and I will provide analysis that answers all of these questions and more!