A survey of asynchronous logic: Comparing various definitions and models for asynchronous switching circuits

The notion of asynchronous switching circuit is roughly understood to be a logical circuit, possibly sequential, in which no special synchronizing signals or "clock" are required for proper circuit operation. Many different formulations of this notion appear in the literature, using sequential machine models and networks of logical element models. The following list of references indicates this diversity. In this talk, various restrictions, similarities, and differences of these models will be discussed.