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Area Optimizations for Dual-Rail Circuits Using Relative-Timing Analysis

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3 Author(s)
Chelcea, T. ; Sch. of Comput. Sci., Carnegie Mellon Univ., Pittsburgh, PA ; Venkataramani, G. ; Goldstein, S.C.

Future deep sub-micron technologies will be characterized by large parametric variations, which could make asynchronous design an attractive solution for use on large scale. However, the investment in asynchronous CAD tools does not approach that in synchronous ones. Even when asynchronous tools leverage existing synchronous tool flows, they introduce large area and speed overheads. This paper proposes several heuristic and optimal algorithms, based on timing interval analysis, for improving existing asynchronous CAD solutions by optimizing area. The optimized circuits are 2.4 times smaller for an optimal algorithm and 1.8 times smaller for a heuristic one than the existing solutions. The optimized circuits are also shown to be resilient to large parametric variations, yielding better average-case latencies than their synchronous counterparts.

Published in:

Asynchronous Circuits and Systems, 2007. ASYNC 2007. 13th IEEE International Symposium on

Date of Conference:

12-14 March 2007