Current signature compression for IR-drop analysis

We present a novel approach to compress current signatures for IR-drop analysis of large power grids. Our approach divides the original current signature into error bounded compression sets. Each compression set has a representative timepoint. The compressed current signature consists of the representative timepoints. The compression technique exploits the pattern of change of individual currents, time locality and periodicity to achieve very high quality results. We provide error guarantees for the compression. Our results are superior in compression and accuracy in comparison to other compression methods such as the single cycle compression.