Michel Demierre

Michel Demierre
La Haute Ecole d'Ingénierie et de Gestion du Canton de Vaud | HEIG-VD · MIS-DC

PhD

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19
Publications
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933
Citations

Publications

Publications (19)
Article
The mass transfer mechanisms in landslides are complex to monitor because of their suddenness and spatial coverage. The active clayey Harmalière landslide, located 30 km south of Grenoble in the French Alps, exhibits two types of behavior: in its upper part, decameter-sized clay blocks slide along a listric slip surface, while a flow-like mechanism...
Conference Paper
Full-text available
Precise landslide monitoring with differential global navigation satellite system (GNSS) is well known, but technical or economic reasons limit its application by geotechnical companies. This study demonstrates the reliability and the usefulness of Geomon (Infrasurvey Sàrl, Switzerland), a stand-alone and cost-effective rover network. The system pe...
Article
Background Gastrointestinal (GI) motor disorders often involve several regions of the GI tract. Therefore, easy and safe assessment of whole gut and regional motility is valuable for more precise diagnosis. 3D-Transit is a novel method for ambulatory evaluation of total and regional gastrointestinal transit times (GITT) based on the anatomical loca...
Article
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A new microsystem with the ability to detect magnetic microstructures based on the non-invasive Hall principle is presented. The micro-Hall plate embedded in the microsystem and scaled down to the physical limits of the employed CMOS technology has an active area of only 2.4 μm × 2.4 μm. The microsystem exhibits an output sensitivity of 7.5 V/T in...
Article
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We have developed the first 360° contactless absolute angular microsystem using a CMOS two-dimensional vertical Hall sensor. The microsystem contains two groups of vertical Hall sensors, mutually oriented at 90°, and complete readout electronics. The spinning current method is used to extract the signals from the sensors. Projections onto two ortho...
Article
Full-text available
A residual offset lower than 0.2mT is obtained with a CMOS integrated vertical Hall (VH)-sensor microsystem. Instead of the conventional design with five contacts in the sensor active area, we apply a layout with only four contacts. This design shows a higher effectiveness for the offset reduction by the spinning current (SC) method, because of the...
Article
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In this review paper, we summarize the performance (in particular the magnetic field resolution), micro-fabrication technologies and applications of micrometer sized Hall effect devices. Additionally, our activities in this domain are briefly described.
Article
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Thèse no 2844 sc. techn. EPF Lausanne. Literaturverz.
Article
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Using a highly sensitive silicon Hall sensor fabricated in a standard complementary metal–oxide–semiconductor (CMOS) technology, we detect a single magnetic microbead of 2.8 μm in diameter. The miniaturized sensor has an active area of 2.4×2.4 μ m <sup> 2 </sup>, a sensitivity of 175 V/AT and a resistance of 8.5 kΩ. Two detection methods, both expl...
Article
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In this paper we demonstrate for the first time, how vertical Hall devices manufactured in CMOS technology attain sensitivities comparable to those of conventional silicon plate-shape devices without modifying the standard process or adding any post-processing steps. This was achieved by taking advantage of the low-doped deep wells provided by a hi...
Article
The magnetic sensitivity drift is one of the main problems with Hall devices in silicon. Common compensation methods are not applicable for unpredictable changes and irreversible drifts of the sensor characteristics, such as aging effects or stress variations caused by thermal shocks. One way to cope with it, is to use an integrated coil as a refer...
Conference Paper
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We studied nonlinear behaviour of the angular position magnetic field sensor that consists of CMOS integrated circuit chip and a thin ferromagnetic disk. Developed numerical 3D model was compared with experimental results with a good agreement. Obtained numerical results were used to determine the linear magnetic working range of the sensor. We als...
Article
Full-text available
Using a highly sensitive silicon Hall sensor fabricated in a standard complementary metal-oxide-semiconductor (CMOS) technology, we detect a single magnetic microbead of 2.8 μm in diameter. The miniaturized sensor has an active area of 2.4×2.4 μm 2, a sensitivity of 175 V/AT and a resistance of 8.5 k. Two detection methods, both exploiting the supe...
Conference Paper
Summary form only given. A CMOS microsystem consists of an array of miniature integrated Hall sensors and dynamic offset cancellation interface electronics. It has 86 V/Tesla magnetic sensitivity, 160 μTesla magnetic offset field, and 0.8 μTesla/√Hz noise density while consuming 2.3 mA from a single 5 V supply. It measures the Earth's magnetic fiel...
Conference Paper
Full-text available
In this paper we describe new ways to realise micro-channels. The used technologies are based on a novel thick-film photoplastic, the SU-8. This photoresist has outstanding properties, allowing the realisation of high aspect ratio microstructures. It is a simple and low-cost fabrication process. The micro channels developed in this work will be use...

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