Print Email Facebook Twitter A Power-Efficient Readout for Wheatstone-Bridge Sensors With COTS Components Title A Power-Efficient Readout for Wheatstone-Bridge Sensors With COTS Components Author Jiang, H. (TU Delft Electronic Instrumentation) Vogel, J.G. (TU Delft Electronic Instrumentation) Nihtianova, S. (TU Delft Electronic Instrumentation) Date 2017 Abstract This paper presents a direct digital converter for Wheatstone bridge sensors, which is realized with commercial off-the-shelf components. The power efficiency of the readout is enhanced by embedding the bridge sensor in a second-order continuous-time sigma-delta modulator (CTDeltaSigmaM). By directly digitizing the output signal of a Wheatstone bridge in the current mode, the noise performance is dominated by the operational amplifier in the first integrator and the bridge sensor. To demonstrate the performance of the proposed circuit, an MEMS piezoresistive differential pressure sensor is used. Measurement results show that a resolution of 12.7 mParms (0.41 mOhmrms), with a 0.5-ms conversion time, can be achieved. Powered by 5 V, the circuit and the bridge sensor draw 9.55 and 7.58 mW, respectively. Subject Direct digital converterbridge sensor readoutcontinuous-time sigma-delta modulatormPa-level differential pressure sensing To reference this document use: http://resolver.tudelft.nl/uuid:b93c70c0-69c0-4156-a851-ad54168deafa DOI https://doi.org/10.1109/JSEN.2017.2755074 ISSN 1530-437X Source IEEE Sensors Journal, 17 (21), 6986-6994 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2017 H. Jiang, J.G. Vogel, S. Nihtianova Files PDF 36831711.pdf 1.41 MB Close viewer /islandora/object/uuid:b93c70c0-69c0-4156-a851-ad54168deafa/datastream/OBJ/view