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Linear Integrated Interface for Automatic Differential Capacitive Sensing
University of L’Aquila, Italy.
University of L’Aquila, Italy.
University of L’Aquila, Italy.
University of L’Aquila, Italy.
Vise andre og tillknytning
2017 (engelsk)Inngår i: Proceedings, Volume 1, Eurosensors 2017, 2017, Vol. 1, nr 4Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

In this work, the authors introduce a new full-analog front-end for differential capacitance sensors which provides a DC output voltage, directly proportional to the measurand variations. The readout circuit architecture is based on a De Sauty bridge as core of the capacitive sensing whereas the feedback circuitry performs the bridge autobalancing operation by means of changes in a multiplier output. The circuit is designed in a standard CMOS technology (AMS 0.35 µm) so is suitable for portable systems. Simulated results have shown a good agreement with the theoretical model being the percentage relative error less than 2.5%. Interface sensitivity is constant and values around 0.055 V/mm for the considered application.

sted, utgiver, år, opplag, sider
2017. Vol. 1, nr 4
Emneord [en]
differential capacitance sensors, bridge-based circuits, CMOS technology, sensor interfaces
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-33332DOI: 10.3390/proceedings1040592OAI: oai:DiVA.org:miun-33332DiVA, id: diva2:1192291
Konferanse
Eurosensors 2017 Conference, Paris, France, 3–6 September 2017
Tilgjengelig fra: 2018-03-22 Laget: 2018-03-22 Sist oppdatert: 2018-03-22bibliografisk kontrollert

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