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Electronics 2019, 8(1), 24; https://doi.org/10.3390/electronics8010024

Fine-Grain Circuit Hardening Through VHDL Datatype Substitution

Department of Electronic Engineering, Universidad de Sevilla, Camino de los Descubrimientos s/n, 41092 Sevilla, Spain
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Received: 30 November 2018 / Revised: 21 December 2018 / Accepted: 23 December 2018 / Published: 25 December 2018
(This article belongs to the Special Issue Radiation Tolerant Electronics)
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Abstract

Radiation effects can induce, amongst other phenomena, logic errors in digital circuits and systems. These logic errors corrupt the states of the internal memory elements of the circuits and can propagate to the primary outputs, affecting other onboard systems. In order to avoid this, Triple Modular Redundancy is typically used when full robustness against these phenomena is needed. When full triplication of the complete design is not required, selective hardening can be applied to the elements in which a radiation-induced upset is more likely to propagate to the main outputs of the circuit. The present paper describes a new approach for selectively hardening digital electronic circuits by design, which can be applied to digital designs described in the VHDL Hardware Description Language. When the designer changes the datatype of a signal or port to a hardened type, the necessary redundancy is automatically inserted. The automatically hardening features have been compiled into a VHDL package, and have been validated both in simulation and by means of fault injection. View Full-Text
Keywords: radiation hardening; hardening by design; TMR; selective hardening; VHDL radiation hardening; hardening by design; TMR; selective hardening; VHDL
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Muñoz-Quijada, M.; Sanchez-Barea, S.; Vela-Calderon, D.; Guzman-Miranda, H. Fine-Grain Circuit Hardening Through VHDL Datatype Substitution. Electronics 2019, 8, 24.

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