An ultra-low-power front-end for differential capacitive sensors

Patcharee Kongpark; Frédérick Mailly; Laurent Latorre; Pascal Nouet

doi:10.1109/DTIP.2015.7160964

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An ultra-low-power front-end for differential capacitive sensors

Patcharee Kongpark, Frédérick Mailly, Laurent Latorre et Pascal Nouet

17th Symposium on Design, Test, Integration & Packaging of MEMS and MOEMS

DTIP: Design, Test, Integration and Packaging (Montpellier, France, 27/04/2015–30/04/2015)

2015

DOI: https://doi.org/10.1109/DTIP.2015.7160964

Résumé

Capacitive sensors

Analog Front End

Micro Electro Mechanical Systems

In this paper, we present a simple, compact and low-power interface for differential capacitive sensors with direct digital output. The complete system is composed with a current to voltage amplifier, an integrator, a comparator and a feedback capacitor connected in parallel with one of the two capacitances. Overall a Sigma-Delta modulator is obtained that is able to deliver directly a bit stream proportional to the differential capacitance.

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Détails

Titre: An ultra-low-power front-end for differential capacitive sensors
Créateurs - sans rôle: Patcharee Kongpark - Laboratoire d'Informatique, de Robotique et de Microélectronique de Montpellier
Frédérick Mailly - Université de Montpellier
Laurent Latorre - Université de Montpellier
Pascal Nouet - Centre National de la Recherche Scientifique
Détails de publication: 17th Symposium on Design, Test, Integration & Packaging of MEMS and MOEMS
Colloque: DTIP: Design, Test, Integration and Packaging (Montpellier, France, 27/04/2015–30/04/2015)
Identifiants: 9944954409311
Unité académique: Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier - LIRMM
Langue: English
Type de ressource: Conference proceeding
Champs locaux: lirmm-01235453