Worst-Case Noise Area Prediction Of On-Chip Power Distribution Network

We propose a prediction of the worst-case noise area of the supply voltage on the power distribution network (PDN). Previous works focus on the worst-peak droop to sign off PDN. In this work, we (1) study the behavior of circuit delay over the worst-area noise (2) study the worst-case noise area of a lumped PDN model (3) develop an algorithm to generate the worst-case current for general PDN cases (4) predict the longest delay of a datapath due to power integrity. Experimental results show that the worst-area noise induces additional delay than that of the worst-peak noise.