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A Multimode CMOS Vision Sensor With On-Chip Motion Direction Detection and Simultaneous Energy Harvesting Capabilities
Wu, Jiangchao1; Lu, Xin1; Law, Man-Kay1; Jiang, Yang1; Liu, Liyuan2; Mak, Pui-In1; Martins, Rui P.1,3
2022-06
Source PublicationIEEE Sensors Journal
ISSN1558-1748
Volume22Issue:12Pages:12808 - 12819
Abstract

This work presents a 128×128 multi-function CMOS vision sensor with motion direction detection (MDD) and simultaneous energy harvesting (EH) capability, featuring: 1) light weight template-based optical flow (OF) algorithm for on-chip MDD with high energy efficiency and small area overhead; and 2) independent imaging and energy harvesting (EH) operations using vertically stacked N+/PW and PW/DNW+DNW/PSUB junctions without photodiode reconfiguration. Fabricated in 0.18μm standard CMOS, this work demonstrates the first CMOS vision sensor featuring both MDD and EH modes within a compact pixel pitch of 4.75μm . With a power consumption of 10.5μW at 15fps in MDD mode, the chip prototype achieves a motion sensing figure-of-merit (MS-FoM) of 171 pJ/pixel ⋅ frame, which is 30% better than the state-of-the-art MDD sensors. The proposed EH configuration achieves continuous power generation at 267pW/lx/mm2 irrespective of the imaging/MDD operation, demonstrating a 1.56× improvement over prior arts.

KeywordCmos Image Sensor Energy Harvesting Motion Direction Detection
DOI10.1109/JSEN.2022.3179394
Indexed BySCIE
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000819823500044
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Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Faculty of Science and Technology
THE STATE KEY LABORATORY OF ANALOG AND MIXED-SIGNAL VLSI (UNIVERSITY OF MACAU)
INSTITUTE OF MICROELECTRONICS
Corresponding AuthorWu, Jiangchao; Law, Man-Kay
Affiliation1.ECE Department, FST, State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macao
2.State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
3.Instituto Superior Técnico/Universidade de Lisboa, Lisbon, Portugal
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Wu, Jiangchao,Lu, Xin,Law, Man-Kay,et al. A Multimode CMOS Vision Sensor With On-Chip Motion Direction Detection and Simultaneous Energy Harvesting Capabilities[J]. IEEE Sensors Journal,2022,22(12):12808 - 12819.
APA Wu, Jiangchao,Lu, Xin,Law, Man-Kay,Jiang, Yang,Liu, Liyuan,Mak, Pui-In,&Martins, Rui P..(2022).A Multimode CMOS Vision Sensor With On-Chip Motion Direction Detection and Simultaneous Energy Harvesting Capabilities.IEEE Sensors Journal,22(12),12808 - 12819.
MLA Wu, Jiangchao,et al."A Multimode CMOS Vision Sensor With On-Chip Motion Direction Detection and Simultaneous Energy Harvesting Capabilities".IEEE Sensors Journal 22.12(2022):12808 - 12819.
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