G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 17/50 (2006.01) G06N 5/00 (2006.01)
Patent
CA 2631559
A system that does trustworthy multi-objective structural synthesis of analog circuits, and extracts expert analog circuit knowledge from the resulting tradeoffs. The system defines a space of thousands of possible topologies via a hierarchically organized combination of designer-trusted analog building blocks, so that unlike open-ended synthesis approaches, the resulting topologies are guaranteed trustworthy. The system can perform a search that is a multi-objective evolutionary algorithm that uses an age-layered population structure to balance exploration vs. exploitation, with operators that make the search space a hybrid between vector-based and tree-based representations. A scheme employing average ranking on Pareto fronts is used to handle a high number of objectives. Good initial topology sizings are quickly generated via multi-gate constraint satisfaction. To explicitly capture expert analog design knowledge, data mining is employed on the sized circuits to: automatically generate a decision tree for navigating from performance specifications to topology choice, to do global nonlinear sensitivity analysis, and to generate analytical models of performance tradeoffs. Experiments are performed by simultaneously searching across thousands of different one- and two-stage op amp topologies, followed by data- mining-based topology knowledge extraction.
Borden Ladner Gervais Llp
Mcconaghy Trent
Solido Design Automation Inc.
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