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<dc:title xml:lang="en">Ultra-low power integrated systems for signal conditioning and event-driven power management of wireless sensor nodes</dc:title>
<dcterms:alternative xml:lang="fr">Systèmes intégrés à très faible consommation pour le conditionnement du signal et la gestion d'énergie orientée événements des nœuds de capteurs sans fil</dcterms:alternative>
<dc:subject xml:lang="fr">ASIC</dc:subject>
<dc:subject xml:lang="fr">Ultra-basse consommation (ULP)</dc:subject>
<dc:subject xml:lang="fr">Nœuds de capteurs sans fil (WSN)</dc:subject>
<dc:subject xml:lang="fr">LDO Numérique</dc:subject>
<dc:subject xml:lang="fr">Power Gating</dc:subject>
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<dc:subject xml:lang="en">ASIC</dc:subject>
<dc:subject xml:lang="en">Ultra-Low Power (ULP)</dc:subject>
<dc:subject xml:lang="en">Wireless Sensor Nodes (WSN)</dc:subject>
<dc:subject xml:lang="en">Digital LDO</dc:subject>
<dc:subject xml:lang="en">Power Gating</dc:subject>
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<tef:elementdEntree autoriteExterne="027222004" autoriteSource="Sudoc">Capteurs (technologie)</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Les capteurs sans fil peuvent remplacer les harnais lors de la qualification spatiale, mais se heurtent à un « fossé énergétique » aggravé par le froid cryogénique altérant les batteries. La surveillance continue subit trop de fuites statiques pour être autonome. Cette thèse résout ceci par un ASIC mixte ultra-Basse Consommation (ULP) à architecture pilotée par événements (Event-Driven). Il emploie un power gating agressif bloquant les fuites, et une transmission asservie à la température limitant la RF aux fenêtres thermiques optimales. Un LDO numérique inédit à faible courant de repos assure une haute efficacité en veille et réagit vite aux transitoires. Validée par ASIC (180nm) et FPGA, l’approche prouve qu’allier circuits ULP et gestion événementielle comble le fossé énergétique spatial.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Wireless sensors can replace heavy wired harnesses in satellite qualification. However, space deployment faces an "Energy Gap», worsened by cryogenic conditions degrading batteries. Conventional always-on monitoring suffers from excessive static leakage, preventing autonomy. This thesis solves this via a custom mixed-signal Ultra-Low Power (ULP) ASIC. The core is an Event-Driven architecture using aggressive power gating to eliminate leakage, and a temperature-aware transmission strategy restricting RF operations to favorable thermal windows. A novel digital LDO with low quiescent current maintains high sleep efficiency and responds instantly to transients.Validated by 180nm ASIC and FPGA prototypes, results prove that co-optimizing ULP circuits and event-driven control bridges the energy gap for future space nodes.</dcterms:abstract>
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