PODEA: Power delivery efficient analysis with realizable model reduction

The huge number of independent sources of power delivery systems prevents the use of traditional model reduction algorithms due to the port domination nature. This paper presents an innovative RC model reduction method, PODEA, to analyze RC linear circuits with many dynamic independent sources. Based on the multi-port Norton theorem and model order reduction techniques, we develop and apply current source transformation algorithms to transform attached current sources from one node to neighboring nodes. Since there is no source attached, general RC reduction algorithms can be applied to eliminate the node. Experimental results demonstrate the efficiency and accuracy of the proposed PODEA algorithm. With linear running time, for an example with over 50,000 nodes, our reduction method only takes about 0.6 seconds while maintaining 1% error and 88% reduction ratio.