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Time redundancy based scan flip-flop reuse to reduce SER of combinational logic

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3 Author(s)
Elakkumanan, P. ; Dept. of Comput. Sci. & Eng., Buffalo Univ., NY ; Prasad, K. ; Sridhar, R.

With technology scaling, combinational logic is becoming increasingly vulnerable to radiation strikes. Classical fault tolerant techniques mainly address single even upsets (SEUs). Robust combinational logic designs capable of tolerating single event transients (SETs) also are needed in lower technology nodes. In this paper, we present a novel SET mitigation scheme for flip-flops based on the time redundancy principle. The incurred area overhead due to the radiation hardening is minimized by reusing existing components (uses existing scan portion for SET tolerance). As shown by the simulation results, the proposed SET tolerant flip-flop has no performance overheads and simulation results that show the area overheads in ISCAS benchmark circuits are also presented

Published in:

Quality Electronic Design, 2006. ISQED '06. 7th International Symposium on

Date of Conference:

27-29 March 2006