Luca P. Carloni,  Alberto L. Sangiovanni-Vincentelli. 

Recycling was recently proposed as a system-level design technique to facilitate the building of complex system-on-chips (SOC) by assembling pre-designed components. Recycling allows us to model the communication patterns among the components, analyze the impact of interconnect latency on the overall data processing throughput, and manage computation/communication tradeoffs to optimize the performance of the system. In this paper, we present recycling as a circuit-level design technique for optimizing the performance of sequential circuits beyond what can be achieved by retiming. We also provide a theoretical framework to guide the simultaneous application of the two techniques. Our model identifies the conditions under which an optimally-retimed synchronous circuit can be further sped-up and determines the amount of the resulting performance gain.

http://ieeexplore.ieee.org/iel5/8726/27627/01232805.pdf?tp=&arnumber=1232805&isnumber=27627

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