Multi-Dimensional Circuit and Micro-Architecture Level Optimization
ISQED '07 Proceedings of the 8th International Symposium on Quality Electronic Design
Proceedings of the 2007 IEEE/ACM international conference on Computer-aided design
Variable latency speculative addition: a new paradigm for arithmetic circuit design
Proceedings of the conference on Design, automation and test in Europe
A unified algorithm for elementary functions
AFIPS '71 (Spring) Proceedings of the May 18-20, 1971, spring joint computer conference
ColSpace: towards algorithm/implementation co-optimization
ICCD'09 Proceedings of the 2009 IEEE international conference on Computer design
Scalable stochastic processors
Proceedings of the Conference on Design, Automation and Test in Europe
ERSA: error resilient system architecture for probabilistic applications
Proceedings of the Conference on Design, Automation and Test in Europe
MACACO: modeling and analysis of circuits for approximate computing
Proceedings of the International Conference on Computer-Aided Design
A methodology for energy-quality tradeoff using imprecise hardware
Proceedings of the 49th Annual Design Automation Conference
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Recently many imprecise circuit design techniques have been proposed for implementation of error-tolerant applications, such as multimedia and communications. These algorithms do not mandate absolute correctness of their results, and imprecise circuit components can therefore leverage this relaxed fidelity requirement to provide performance and energy benefits. In this paper, several imprecise adder design techniques are classified and compared in terms of their error characteristics and power-delay efficiency. A general methodology for fidelity-efficiency design space exploration is presented and is applied to a case study implementing the CORDIC algorithm in 130nm technology. The case study reveals that simple precision scaling often provides better power-delay efficiency for a given fidelity than more complex imprecise adders, but different choice of algorithm and fidelity can influence the outcome.