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Banque de filtres passe-bande à oscillateurs verrouillés par injection pour application à la décomposition spectrale, dans un contexte de détection de réveilsur évènement ultra-faible consommation

Abstract : Power consumption of event driven wake-up sensors must be dramaticallydecreased, to reach sensor nodes power autonomy of nearly ten years. To avoidnoise limitations Induced by classical ultra-low power analog design, we proposeto exploit the innovative time-based design method. It consists in encoding theinformation inside the variation of a phase shift between two signals, instead ofinside an analog voltage variation. Consequently, the circuits supply voltage can bedecreased below 0.5V.Benefiting of their phase shifter properties, Injection-Locked Oscillators(ILO) are good candidates for time-based design. In this thesis, we propose to studya particular capacitive injection ILO architecture, to obtain its static and dynamicencoding properties. Thereafter, we exploit the ILO dynamic properties to designan ILO based bandpass filter, to be used in a bandpass filter bank for featureextraction, in a context of ultra-low power wake-up sensors applications. Thisproject led to the design of two functionals circuits in 22nm FDSOI and 65nmCMOS technological processes, demonstrating the feasibility of a 4-channels ILObandpass filter bank, with a power consumption of 12.1nW.
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Submitted on : Thursday, September 16, 2021 - 7:19:09 PM
Last modification on : Saturday, September 18, 2021 - 3:18:59 AM

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  • HAL Id : tel-03347085, version 1

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Nicolas Goux. Banque de filtres passe-bande à oscillateurs verrouillés par injection pour application à la décomposition spectrale, dans un contexte de détection de réveilsur évènement ultra-faible consommation. Micro et nanotechnologies/Microélectronique. Université Grenoble Alpes [2020-..], 2021. Français. ⟨NNT : 2021GRALT034⟩. ⟨tel-03347085⟩

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