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Lowering power consumption in clock by using globally asynchronous locally synchronous design style

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9 Author(s)
Hemani, A. ; Dept. of Electron., KTH, Sweden ; Meincke, T. ; Kumar, S. ; Postula, A.
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Power consumption in clock of large high performance VLSIs can be reduced by adopting globally asynchronous, locally synchronous design style (GALS). GALS has small overheads for the global asynchronous communication and local clock generation. We propose methods to (a) evaluate the benefits of GALS and account for its overheads, which can be used as the basis for partitioning the system into optimal number/size of synchronous blocks, and (b) automate the synthesis of the global asynchronous communication. Three realistic ASICs, ranging in complexity from 1 to 3 million gates, were used to evaluate GALS benefits and overheads. The results show an average power saving of about 70% in clock with negligible overheads

Published in:

Design Automation Conference, 1999. Proceedings. 36th

Date of Conference:

1999

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