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Hierarchical graph reduction approach to symbolic circuit analysis with data sharing and cancellation-free properties

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2 Author(s)
Yang Song ; Sch. of Microelectron., Shanghai Jiao Tong Univ., Shanghai, China ; Guoyong Shi

Parallel to algebraic methods, graphical circuit analysis methods have the advantage of cancellation-free. This paper proposes a graph reduction method for hierarchical symbolic circuit analysis by applying a binary decision diagram (BDD) for data sharing. This method is extended from the Graph-Pair Decision Diagram (GPDD) method which was developed for two-port dependent sources. New graph construction rules for multiple-port dependent sources are introduced, with which large analog circuits can be analyzed hierarchically. The new hierarchical method guarantees the cancellation-free property at each layer of hierarchy. The BDD-based hierarchical analysis method can greatly reduce the analysis complexity of the entire circuit, while the software construction and circuit partition remain easy. The new method is compared to the algebraic hierarchical method based on DDD (Determinant Decision Diagram) which does not have the cancellation-free property. Comparable performance can be achieved with the new method which has the extra cancellation-free property.

Published in:

Design Automation Conference (ASP-DAC), 2012 17th Asia and South Pacific

Date of Conference:

Jan. 30 2012-Feb. 2 2012

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