A Study On Power/ground Network Optimization In Circuit

With the development of integrated circuit technology, the scale of circuit increasing day after day, these characteristics of the constant decrease in the size, chip integration, complexity and frequency substantially increase, power/ground network analysis to the reliability of the circuit design is even more important.Meanwhile, rapid development of the deep sub-micron technology made the power delivery noise cannot be neglected as well. Besides, IR-drops that beyond limits can also cause wrong logic to the chip. Hence, when designing a P/G network, one must consider all those problems above as pro-designing constraints. Only by doing this can we attain the minimum routing area on the premise of supply guaranteedIn this paper, it presents an EKOS (Extend Krylov of Subspace) method for power/ground network analysis. EKS method is an effective simulation; it was widely used in power/ground network analysis. Compared to the existing random-walk method, this new method can estimate the transient response, can produce stable results. So, this research has practical significance.This paper first studies the existing power/ground network analysis method. Clear the research of power/ground, compare the advantage and disadvantage of each method, analyses the facing problems. And then introduction the EKS method, in EKS research, we analyses a very effective large-scale linear algebra equations solution:Krylov Subspace Algorithm. Base on this; apply Extend Krylov Subspace in power/ground network analysis. Make the large-scale power/ground network to simple system. Then lead the result back to the original system. Come to the purpose of power/ground network analysis, I also make EDA software to make sure the EKOS. The thesis uses the C++ language to make sure the EKOS methods.