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Lowering Power Consumption in Clock by Using Globally Asynchronous Locally Synchronous Design Style

  • Ahmed Hemani
  • Thomas Meincke
  • Adam Postula
  • Thomas Olsson
  • Peter Nilsson
  • Johnny Öberg
  • Peeter Ellervee
  • Dan Lindqvist
Publiceringsår: 1999
Språk: Engelska
Sidor: 873-878
Publikation/Tidskrift/Serie: Proceedings of the 36th ACM/IEEE conference on Design automation
Dokumenttyp: Konferensbidrag


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.


  • Electrical Engineering, Electronic Engineering, Information Engineering


36th Design Automation Conference (DAC’99)
  • Elektronikkonstruktion-lup-obsolete
  • ISBN: 1-58133-109-7

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