Print Email Facebook Twitter Energy-efficient readout of resonant sensors Title Energy-efficient readout of resonant sensors Author Zeng, Z. Contributor Pertijs, M.A.P. (mentor) Faculty Electrical Engineering, Mathematics and Computer Science Department Microelectronics & Computer Engineering Date 2011-10-26 Abstract This thesis discusses the theory, architecture and circuit design and measurements of an ultra-low-energy prototype interface circuit for a resonant gas sensor in standard 0.35-?m CMOS technology. A transient measurement method is used here. The resonant sensor is driven at a frequency close to its resonance frequency by an excitation source that can be intermittently disconnected causing the sensor oscillation amplitude to decay exponentially. From the ring-down signal, the frequency of the freely oscillating sensor and the quality factor are obtained. Test chips are fabricated to measure the resonance frequency and quality factor of the resonant sensor using ring-down measurement approach. The obtained results(resonance frequency and quality factor) show good consistency compared with what we obtained using an alternative approach (impedance analysis). The circuit consumes an energy of 237nJ per measurement. Subject resonator readoutring-downlow power To reference this document use: http://resolver.tudelft.nl/uuid:89ca1773-7dd7-40ec-8abc-38bc22719b49 Embargo date 2012-05-20 Part of collection Student theses Document type master thesis Rights (c) 2011 Zeng, Z. Files PDF thesis_final_Zeng.pdf 2.64 MB Close viewer /islandora/object/uuid:89ca1773-7dd7-40ec-8abc-38bc22719b49/datastream/OBJ/view