Proceedings of the 36th annual ACM/IEEE Design Automation Conference
Computer Methods for Circuit Analysis and Design
Computer Methods for Circuit Analysis and Design
Fast analysis and optimization of power/ground networks
Proceedings of the 2000 IEEE/ACM international conference on Computer-aided design
On-chip power supply network optimization using multigrid-based technique
Proceedings of the 40th annual Design Automation Conference
Iterative Methods for Sparse Linear Systems
Iterative Methods for Sparse Linear Systems
Relaxed hierarchical power/ground grid analysis
Proceedings of the 2005 Asia and South Pacific Design Automation Conference
Electronic Circuit & System Simulation Methods (SRE)
Electronic Circuit & System Simulation Methods (SRE)
Hierarchical analysis of power distribution networks
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Partition-based algorithm for power grid design using locality
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Incremental and on-demand random walk for iterative power distribution network analysis
Proceedings of the 2009 Asia and South Pacific Design Automation Conference
Incremental solution of power grids using random walks
Proceedings of the 2010 Asia and South Pacific Design Automation Conference
Efficient incremental analysis of on-chip power grid via sparse approximation
Proceedings of the 48th Design Automation Conference
Power grid analysis with hierarchical support graphs
Proceedings of the International Conference on Computer-Aided Design
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We propose a novel and efficient incremental analysis technique for 'what-if analysis of on-chip power distribution networks (PDN). Effect of local modifications to a PDN, including local topology changes, can be quickly analyzed without need for very expensive re-analysis of the entire modified network. We borrow ideas from a fictitious domain method that has been successfully used in solving partial differential equations arising from inhomogeneous problems in mechanics. The effect of local wiring modifications in several PDN regions is mimicked by applying fictitious currents at the boundaries of these regions in the original unmodified network. The fictitious currents are calculated from component sub-problems in a low-computation iterative procedure. The practicality of this method for use in what-if analysis is demonstrated with several large power networks from actual industrial designs. It analyzes a modified network with few million changes in a fraction of time it would take for a complete re-analysis.