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    A robust parasitic-insensitive successive approximation capacitance-to-digital converter

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    Type
    Conference Paper
    Authors
    Omran, Hesham cc
    Arsalan, Muhammad
    Salama, Khaled N. cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Physical Science and Engineering (PSE) Division
    Sensors Lab
    Date
    2014-09
    Permanent link to this record
    http://hdl.handle.net/10754/564996
    
    Metadata
    Show full item record
    Abstract
    In this paper, we present a capacitive sensor digital interface circuit using true capacitance-domain successive approximation that is independent of supply voltage. Robust operation is achieved by using a charge amplifier stage and multiple comparison technique. The interface circuit is insensitive to parasitic capacitances, offset voltages, and charge injection, and is not prone to noise coupling. The proposed design achieves very low temperature sensitivity of 25ppm/oC. A coarse-fine programmable capacitance array allows digitizing a wide capacitance range of 16pF with 12.5-bit quantization limited resolution in a compact area of 0.07mm2. The fabricated prototype is experimentally verified using on-chip sensor and off-chip MEMS capacitive pressure sensor. © 2014 IEEE.
    Citation
    Omran, H., Arsalan, M., & Salama, K. N. (2014). A robust parasitic-insensitive successive approximation capacitance-to-digital converter. Proceedings of the IEEE 2014 Custom Integrated Circuits Conference. doi:10.1109/cicc.2014.6946080
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    Proceedings of the IEEE 2014 Custom Integrated Circuits Conference
    Conference/Event name
    36th Annual Custom Integrated Circuits Conference - The Showcase for Integrated Circuit Design in the Heart of Silicon Valley, CICC 2014
    ISBN
    9781479932863
    DOI
    10.1109/CICC.2014.6946080
    ae974a485f413a2113503eed53cd6c53
    10.1109/CICC.2014.6946080
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Electrical and Computer Engineering Program; Sensors Lab; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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