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

doi: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

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

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	564-567
Number of pages	4
ISBN (Electronic)	9781479923465
DOIs	https://doi.org/10.1109/BioCAS.2014.6981788
State	Published - Dec 9 2014
Event	10th IEEE Biomedical Circuits and Systems Conference, BioCAS 2014 - Lausanne, Switzerland Duration: Oct 22 2014 → Oct 24 2014

Publication series

Name	IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings

Other

Other	10th IEEE Biomedical Circuits and Systems Conference, BioCAS 2014
Country	Switzerland
City	Lausanne
Period	10/22/14 → 10/24/14

ASJC Scopus subject areas

Hardware and Architecture
Biomedical Engineering

Access to Document

10.1109/BioCAS.2014.6981788

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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] (IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings). 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 (IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference 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, IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings, 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. (IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings). 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 (IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings).

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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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