Print Email Facebook Twitter An Energy-Efficient Reconfigurable Interface for Resonant Sensors Based On Ring-Down Measurement Title An Energy-Efficient Reconfigurable Interface for Resonant Sensors Based On Ring-Down Measurement Author Yan, Y. Contributor Pertijs, M.A.P. (mentor) Faculty Electrical Engineering, Mathematics and Computer Science Department Microelectronics & Computer Engineering Programme Microelectronics Date 2013-08-22 Abstract This thesis discusses the theory, architecture design, circuit design and measurements of an ultra-low-energy reconfigurable interface circuit for resonant gas sensors. This interface circuit employs a transient measurement method. The resonant sensor is driven at a frequency close to its resonance frequency by an excitation source that is intermittently disconnected, causing the sensor to oscillate at its resonance frequency with an exponentially-decaying amplitude. From the associated ring-down signal, the frequency of the freely-oscillating sensor and its quality factor are obtained by means of a counting technique. A prototype readout circuit that senses the ring-down signal and performs the required level-crossing detection has been fabricated in a standard 0.35-?m CMOS technology. The experimental results obtained using this prototype in combination with samples of micro-machined clamped-clamped beam resonators show good consistency with the resonance frequency and quality factor obtained using conventional impedance analysis. Compared to prior implementations, the realized prototype is less sensitive to leakage currents, enabling a shorter measurement time, and provides a reconfigurable front-end circuit that allows it to be connected to resonators with different parameters. The circuit consumes an energy of 207.9nJ per measurement. Subject energy-efficiencysensor interfacingresonant sensorsreconfigurability To reference this document use: http://resolver.tudelft.nl/uuid:e98b4e14-4453-4103-9ef1-03f3176ac0c7 Embargo date 2014-09-01 Part of collection Student theses Document type master thesis Rights (c) 2013 Yan, Y. Files PDF Thesis_Yuxin_2013.pdf 3.5 MB Close viewer /islandora/object/uuid:e98b4e14-4453-4103-9ef1-03f3176ac0c7/datastream/OBJ/view