A 12.6 mW 8.3 Mevents/s contrast detection 128×128 imager with 75 dB intra-scene DR asynchronous random-access digital readout

Jongkil Park, Sohmyung Ha, Chul Kim, Siddharth Joshi, Theodore Yu, Wei Ma, Gert Cauwenberghs

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    We present a temporal contrast detection event-driven asynchronous 128×128 pixel image sensor with integrated 10-bit ADC intensity readout in 0.18 μm 6M 1P CMOS. Current-mode log-compressed readout with correlated double sampling (CDS) offset compensation provides random access to instantaneous pixel intensity over 75 dB intra-scene dynamic range. Temporal correlated double sampling in 'on' and 'off' transient event detection reduces capacitor sizing requirements within the pixel. Global threshold adaptation using common-mode capacitive coupling across the pixel array compensates for global scene lighting variations. Power consumption at 8.3 Mevents/s is 12.6 mW from a 1.8 V supply, or 1.52 nJ per pixel event detection and readout. Die size is 5mm×5mm and pixel size is 33μm×33μm with 22.8% fill factor.

    Original languageEnglish (US)
    Title of host publicationIEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages564-567
    Number of pages4
    ISBN (Electronic)9781479923465
    DOIs
    StatePublished - Jan 1 2014
    Event10th IEEE Biomedical Circuits and Systems Conference, BioCAS 2014 - Lausanne, Switzerland
    Duration: Oct 22 2014Oct 24 2014

    Other

    Other10th IEEE Biomedical Circuits and Systems Conference, BioCAS 2014
    CountrySwitzerland
    CityLausanne
    Period10/22/1410/24/14

    Fingerprint

    Image sensors
    Pixels
    Sampling
    Electric power utilization
    Capacitors
    Lighting

    ASJC Scopus subject areas

    • Hardware and Architecture
    • Biomedical Engineering

    Cite this

    Park, J., Ha, S., Kim, C., Joshi, S., Yu, T., Ma, W., & Cauwenberghs, G. (2014). A 12.6 mW 8.3 Mevents/s contrast detection 128×128 imager with 75 dB intra-scene DR asynchronous random-access digital readout. In IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings (pp. 564-567). [6981788] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/BioCAS.2014.6981788

    A 12.6 mW 8.3 Mevents/s contrast detection 128×128 imager with 75 dB intra-scene DR asynchronous random-access digital readout. / Park, Jongkil; Ha, Sohmyung; Kim, Chul; Joshi, Siddharth; Yu, Theodore; Ma, Wei; Cauwenberghs, Gert.

    IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2014. p. 564-567 6981788.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Park, J, Ha, S, Kim, C, Joshi, S, Yu, T, Ma, W & Cauwenberghs, G 2014, A 12.6 mW 8.3 Mevents/s contrast detection 128×128 imager with 75 dB intra-scene DR asynchronous random-access digital readout. in IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings., 6981788, Institute of Electrical and Electronics Engineers Inc., pp. 564-567, 10th IEEE Biomedical Circuits and Systems Conference, BioCAS 2014, Lausanne, Switzerland, 10/22/14. https://doi.org/10.1109/BioCAS.2014.6981788
    Park J, Ha S, Kim C, Joshi S, Yu T, Ma W et al. A 12.6 mW 8.3 Mevents/s contrast detection 128×128 imager with 75 dB intra-scene DR asynchronous random-access digital readout. In IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2014. p. 564-567. 6981788 https://doi.org/10.1109/BioCAS.2014.6981788
    Park, Jongkil ; Ha, Sohmyung ; Kim, Chul ; Joshi, Siddharth ; Yu, Theodore ; Ma, Wei ; Cauwenberghs, Gert. / A 12.6 mW 8.3 Mevents/s contrast detection 128×128 imager with 75 dB intra-scene DR asynchronous random-access digital readout. IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2014. pp. 564-567
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    abstract = "We present a temporal contrast detection event-driven asynchronous 128×128 pixel image sensor with integrated 10-bit ADC intensity readout in 0.18 μm 6M 1P CMOS. Current-mode log-compressed readout with correlated double sampling (CDS) offset compensation provides random access to instantaneous pixel intensity over 75 dB intra-scene dynamic range. Temporal correlated double sampling in 'on' and 'off' transient event detection reduces capacitor sizing requirements within the pixel. Global threshold adaptation using common-mode capacitive coupling across the pixel array compensates for global scene lighting variations. Power consumption at 8.3 Mevents/s is 12.6 mW from a 1.8 V supply, or 1.52 nJ per pixel event detection and readout. Die size is 5mm×5mm and pixel size is 33μm×33μm with 22.8{\%} fill factor.",
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