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BDD-based synthesis of extended burst-mode controllers

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4 Author(s)
K. Y. Yun ; Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA ; B. Lin ; D. L. Dill ; S. Devadas

We examine the implications of a new hazard-free combinational logic synthesis method, which generates multiplexor-based networks from binary decision diagrams (BDD's)-representations of logic functions factored recursively with respect to input variables-on extended burst-mode asynchronous synthesis. First, this method guarantees that there exists a hazard-free BDD-based implementation for every legal extended burst-mode specification. Second, it reduces the constraints on state minimization and assignment, which reduces the number of additional state variables required in many cases. Third, in cases where conditional signals are sampled, it eliminates the need for state variable changes preceding output changes, which reduces overall input-to-output latency. Last, we describe a circuit that exemplifies how the BDD variable ordering affects the path delay

Published in:

IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems  (Volume:17 ,  Issue: 9 )