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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 電機工程學系 > 會議論文  >  A 0.6V CMOS Image Sensor with in-Pixel Biphasic Current Driver for Biomedical Application

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/70774

    Title: A 0.6V CMOS Image Sensor with in-Pixel Biphasic Current Driver for Biomedical Application
    Authors: Chin-Lin Lee;Chih-Cheng Hsieh
    教師: 謝志成
    Date: 2011
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: Proc. of 2011 IEEE International Symp. on Circuits and Systems, Rio de Janeiro, Brazil, 15-18 May 2011, Pages 1455 - 1458
    Keywords: CMOS
    Biphasic Current Driver
    Biomedical Application
    Abstract: A 0.6V pulse frequency modulation (PFM) CMOS Image Sensor (CIS) array with in-pixel biphasic current pulse driver is presented in this paper. It achieves a photon-to-biphasic current conversion for biomedical applications like artificial 2-D vision recovery. The photon-to-biphasic-current conversion gain, the biphasic pulse width, polarity, and output rate are all tunable depends on applications and environments. A 32×32 pixel array with 30×30 um2 pixel size has been designed and fabricated in 0.18um CMOS technology providing the fill factor of 24.5%. Measurement results show a 0.63Hz/lux conversion gain of PFM sensor within 25hz∼5kHz output with power consumption as 2uW∼55uW depends on illumination. The maximum driving capability of biphasic neural stimulation current pulse is ±20µA with a 10kΩ electrode model.
    Relation Link: http://www.ieee.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/70774
    Appears in Collections:[電機工程學系] 會議論文

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