Testing a fault tolerant mixed-signal design under TID and heavy ions

• Autor(a) principal: González Aguilera, Carlos Julio
• Data de Publicação: 2021
• Outros Autores: Machado, Diego do Nascimento, Vaz, Rafael Galhardo, Vilas Bôas, Alexis Cristiano, Gonçalez, Odair Lelis, Puchner, Helmut K., Added, Nemitala, Macchione, Eduardo, Aguiar, Vitor Ângelo Paulino de, Kastensmidt, Fernanda Gusmão de Lima, Medina, Nilberto Hedar, Guazzelli, Marcilei Aparecida, Balen, Tiago Roberto
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/256486
• topic: Aquisição de dados; Efeitos da radiação; Conversor analogico/digital; Design diversity redundancy; Mixed-signal; Radiation; Single events; Soft errors; Fault tolerance; Analog-to-digital converters; Programmable device; PSoC

This work presents results of three distinctradiation tests performed upon a fault tolerant data acqui-sition system comprising a design diversity redundancytechnique. The first and second experiments are Total Ion-izing Dose (TID) essays, comprising gamma and X-rayirradiations. The last experiment considers single eventeffects, in which two heavy ion irradiation campaignsare carried out. The case study system comprises threeanalog-to-digital converters and two software-based vot-ers, besides additional software and hardware resourcesused for controlling, monitoring and memory manage-ment. The applied Diversity Triple Modular Redundancy(DTMR) technique, comprises different levels of diversity(temporal and architectural). The circuit was designed ina programmable System-on-Chip (PSoC), fabricated in a130nm CMOS technology process. Results show that thetechnique may increase the lifetime of the system underTID if comparing with a non-redundant implementation.Considering the heavy ions experiments the system wasproved effective to tolerate 100% of the observed errorsoriginated in the converters, while errors in the process-ing unit present a higher criticality. Critical errors occur-ring in one of the voters were also observed. A secondheavy ion campaign was then carried out to investigatethe voters reliability, comparing the the dynamic cross sec-tion of three different software-based voter schemes im-plemented in the considered PSoC.