Functional verification of logic and memory circuits with...

Computer-aided design and analysis of circuits and semiconductor – Nanotechnology related integrated circuit design

Reexamination Certificate

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Reexamination Certificate

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07143377

ABSTRACT:
In an emulation system, a method is provided to schedule evaluations of state elements and memory elements receiving signals from multiple asynchronous clock domains, such that causality and hold time requirements are satisfied. In addition, a method is provided such that logic signals responsive to multiple asynchronous clock domains are transported along separate single domain path of substantially equal transit times. In one implementation, the scheduling method computes departure times and ready times for output and input terminals of logic modules, such as FPGAS.

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Charles Selvidge, et al., “TIERS: Topology IndependEnt Pipelined Routing and Scheduling for VirtualWire™ Compilation”, Virtual Machine Works, Inc., pp. 25-30 Feb. 12-14, 1995.
Jack S.N. Jean, et al., “Dynamic Reconfiguration to Support Concurrent Applications”, IEEE Transactions on Computers, vol. 48, No. 6, Jun. 1999, pp. 591-602.

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