An Adaptative Ratio-Metric Analog-To-Digital Interface For Weakly-Coupled Resonant Sensors Based On Mutually Injection-Locked Oscillators - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2019

An Adaptative Ratio-Metric Analog-To-Digital Interface For Weakly-Coupled Resonant Sensors Based On Mutually Injection-Locked Oscillators

Résumé

In this paper, we propose a new ratio-metric interface for amplitude-modulated MEMS sensors based on mutually injection-locked oscillators (MILO). The two outputs are down-converted by a peak demodulator to improve the immunity to phase variation and noise. The peak values are then fed into a second-order discrete-time delta-sigma modulator that directly produces a digital ratio-metric output with a worstcase resolution greater than 16 bits and with input full scale of 0.6. The interface is clocked by the resonators output signal and is adapted for a sampling frequency up to 1MHz.
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Dates et versions

hal-02290315 , version 1 (05-10-2022)

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Ali Mostafa, Jérôme Juillard, João R. Raposo de O. Martins, Pietro Maris Ferreira. An Adaptative Ratio-Metric Analog-To-Digital Interface For Weakly-Coupled Resonant Sensors Based On Mutually Injection-Locked Oscillators. Proc. IEEE Design, Test, Integration & Packaging of MEMS/MOEMS, May 2019, Paris, France. ⟨10.1109/DTIP.2019.8752831⟩. ⟨hal-02290315⟩
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