Low energy asynchronous architectures

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Low energy asynchronous architectures
: Asynchronous circuits are often presented as a means of achieving low power operation. We investigate their suitability for low-energy applications, where long battery life and delay tolerance is the principal design goal, and where performance is not a critical requirement. Three existing adder circuits are studied — two dynamic and one based on pass-transistor logic. All adders combine dual-rail and bundled-data circuits. The circuits are simulated at a wide supply-voltage range, down to their minimal operating point. Leakage energy (at 0.18 m) is found negligible. Transistor count is found to be an unreliable predictor of energy dissipation. A set of the energy minimization rules is defined and two novel adders are proposed, based on these rules – a dynamic circuit and a passtransistor logic adder. The new adders consume less energy and achieve better performance, confirming the proposed concepts.
Ilya Obridko, Ran Ginosar
Added 25 Jun 2010
Updated 25 Jun 2010
Type Conference
Year 2005
Authors Ilya Obridko, Ran Ginosar
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