New challenges as the PDN requirements of cutting-edge designs continue to evolve.
Over the past few decades, a lot of details have been worked out in power distribution network design, simulation and measurement. We have well-established PDN design procedures both in the frequency and time domains, we have simulation tools that can analyze the physical structure from DC to very high frequencies, including spatial variations of the behavior, and we also have frequency and time domain test methods to measure the steady state and transient behavior of the built-up systems. All of these pieces in our current toolbox have their own assumptions, limitations and artifacts and they constantly raise the challenging question that designers need to answer: how to select the design process, simulation and measurement tools and processes so that we get reasonable answers within a reasonable time frame with a reasonable budget. This paper will discuss a series of new challenges we now face as the PDN requirements of cutting-edge designs continue to evolve.
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