Stimuli-Driven Power Grid Analysis

The terms vector and vectorless modes are commonly used in the context of dynamic power grid (PG) analysis, but what do these terms mean? The PG dynamic simulator uses a design’s activity suite to compute the voltages and currents in the PG network. In vector mode, logic simulation is used to generate the complete activity suite. Vector mode is typically referred as a VCD (Value Change Dump).... » read more

Power Grid Analysis Heats Up At 20nm

By Ann Steffora Mutschler Do a simple Internet search for the term ‘power grid analysis’ and most of the results are academic sources. However, given the physics of either planar or finFET at 20nm and below, the power grid will see significant impacts. Overall, there are a number of technical implications of migrating from 28nm down to 20, 16 or 14 nm, with further impacts of moving fro... » read more

Power Grid Analysis

By Christen Decoin With increasing design size at each technology node, power grid analysis (PGA) has been stretching established software capacity and performance for some time. At 32/28nm, capacity and performance issues finally presented significant barriers to achieving signoff. In this article, we explore existing approaches that EDA vendors have been trying to leverage to work around ... » read more

Power Grid Analysis

By Marko Chew Introduction Power grids (PGs) have consumed an increasingly larger percentage of routing resources in recent process node generations, due to lower maximum current limits imposed by the foundry. It is not uncommon to see upwards of 30% of the routing resources consumed by the PG, with correspondingly negative implications for a design’s routability. Of course, the design’... » read more