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Design of Asynchronous Circuits Using Synchronous CAD Tools
July/August 2002 (vol. 19 no. 4)
pp. 107-117

Poor CAD support hinders wide acceptance of asynchronous methodologies, and asynchronousdesign tools are far behind synchronous commercial tools. A new design flow, NCL_X, based entirely on commercial CAD tools, targets a subclass of asynchronous circuits called null convention logic. NCL_X shows significant area improvement over other flows for this subclass.EDA FLOWS are industry driven and thus use synchronous methodologies as de facto standards. However implementation problems arise from imposing a synchronous model of operation on deep-submicron circuits. This problem motivates the investigation of other asynchronous modes of operation. Acceptance of new design methodologies including asynchronous ones engineering and industrial communities depends on three major issues: added value of the methodology in terms ofarea power speed electromagnetic interference (EMI) noise immunity and so on; tradeoffs which design parameters often worsen to achieve added values such as speed versus power and area versus EMI; and the cost of switching to the new methodology including training time development of new libraries and time spent dealing with CAD tool immaturity.

Alex Kondratyev, Kelvin Lwin, "Design of Asynchronous Circuits Using Synchronous CAD Tools," IEEE Design & Test of Computers, vol. 19, no. 4, pp. 107-117, July-Aug. 2002, doi:10.1109/MDT.2002.1018139
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