| A comparison with synchronous circuits suggests four opportunities for the application of asynchronous circuits: high performance, low p o wer, improved noise and EMC properties, and a natural match with heterogeneous system timing. In this overview article each opportunity is reviewed in some detail, illustrated by examples, compared with synchronous alternatives, and accompanied by numerous pointers to the literature. Conditions for applying asynchronous circuit technology, such as the existence and availability of CAD tools, circuit libraries, and e ective test approaches, are discussed brie y. Asynchronous circuits do o er advantages for many applications, and their design methods and tools are now starting to become mature.
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