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Asynchronous quasi-delay-insensitive (QDI) circuits are a promising solution for coping with aggressive process variations faced by modern technologies, as they can gracefully accommodate gate and wire delay variations. Furthermore, due to their inherent robustness, such circuits are also promising for deep voltage scaling applications, where delays are orders of magnitude larger. However, QDI design...
Asynchronous quasi-delay-insensitive (QDI) circuits are a promising solution for coping with aggressive process variations faced by modern technologies, as they can gracefully accommodate gate and wire delay variations. The literature proposes several QDI design templates with different trade-offs, giving designers a large spectrum of options to use, adapt or even mix. Among these, NULL Convention...
An analysis of the state of art in asynchronous circuits reveals a lack of resources to support their design. When asynchronous cell libraries appear in the literature, they often accompany a demand from specific circuit designs, and are not proposed as general purpose resources to support semi-custom design styles. Moreover, currently proposed asynchronous libraries employ commercial technologies...
Despite their substantial power savings, voltage scaling design increases the concern about sensitivity to manufacturing process and operating conditions variations. These can induce significant delay changes in fabricated circuits. An elegant approach to cope with these issues is to employ quasi delay-insensitive asynchronous design styles, which allow relaxing timing assumptions, enabling simpler...
Asynchronous design techniques are gaining attention in the scientific community for their ability to cope with current technologies' problems that the synchronous paradigm may fail to cope with. In fact, fully synchronous SoCs may soon become unfeasible to build. Among multiple asynchronous design styles, the quasi delay insensitive (QDI) stands out for its robustness to delay variations. When coupled...
The scaling of microelectronic technologies brings new challenges to the design of complex SoCs. For example, fully synchronous SoCs may soon become unfeasible to build. Asynchronous design techniques increasingly mingle within SoC design procedures to achieve functional and efficient systems, where synchronous modules are independently designed and verified. This is followed by module integration...
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