Tof Image Sensor With Pulsefrequencymodulation Pixel For Inpixel Code Discrimination

• doi: 10.1109/ISCAS51556.2021.9401132
• title: ToF Image Sensor with Pulse-Frequency-Modulation Pixel for In-Pixel Code Discrimination
• publisher: IEEE
• isbn: 978-1-7281-9201-7
• issn: 2158-1525
• rank: 3864
• access_type: LOCKED
• content_type: Conferences
• abstract: This paper presents a time-of-flight (ToF) CMOS image sensor with pulse-frequency-modulation (PFM) pixel for in-pixel code discrimination (CD). One of ToF's main problem is interference between multiple sensors or malicious one by third party. CD is a function that discriminates signal light from the others with code modulation, which will be an effective countermeasure against such interference. Proposed pixel contains a PFM circuit and counters, with which in-pixel CD and distance measurement (DM) is tried to be realized. In this paper, methods of CD and DM, circuit implementation are shown, and HSPICE and C simulation demonstrates signal-to-background ratio rejection of -7dB and 8dB signal-to-interference ratio for 128-bit CD with less than 0.08% error.
• article_number: 9401132
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9401132
• html_url: https://ieeexplore.ieee.org/document/9401132/
• abstract_url: https://ieeexplore.ieee.org/document/9401132/
• publication_title: 2021 IEEE International Symposium on Circuits and Systems (ISCAS)
• conference_location: Daegu, Korea
• conference_dates: 22-28 May 2021
• publication_number: 9401028
• is_number: 9401051
• publication_year: 2021
• publication_date: 22-28 May 2021
• start_page: 1
• end_page: 5
• citing_paper_count: 0
• citing_patent_count: 0
• download_count: 370
• insert_date: 20210427
• index_terms:
  • ieee_terms:
    • Semiconductor device measurement
    • Systems operation
    • Simulation
    • Interference
    • Optical sensors
    • Integrated circuit modeling
    • Signal to noise ratio
  • author_terms:
    • image sensor
    • time-of-flight
    • pulse-frequency-modulation
    • code discrimination
  • dynamic_index_terms:
    • Image Sensor
    • Camera Sensor
    • Distancing Measures
    • Light Signal
    • Traffic Signal
    • Multiple Sensors
    • Circuit Implementation
    • Signal-to-interference Ratio
    • Signal To Interference Ratio
    • Coded Modulation
    • Coding Sequence
    • Bitrate
    • Ideal Situation
    • Digital Signal Processing
    • Time Division Multiple Access
    • Time-division Multiple Access
    • Gate Width
    • Gate Widths
• isbn_formats:
  • format: Print ISBN, value: 978-1-7281-9201-7, isbnType: New-2005
• authors:
  • Author Name: N. Watanabe
    Affiliation: School of Engineering, The University of Tokyo, Tokyo, Japan
    Author URL: https://ieeexplore.ieee.org/author/37089403303
    ID: 37089403303
    Order: 1
    Author Affiliations:
    • School of Engineering, The University of Tokyo, Tokyo, Japan
  • Author Name: M. Ikeda
    Affiliation: School of Engineering, The University of Tokyo, Tokyo, Japan
    Author URL: https://ieeexplore.ieee.org/author/37273902900
    ID: 37273902900
    Order: 2
    Author Affiliations:
    • School of Engineering, The University of Tokyo, Tokyo, Japan

Image Sensor

• sensor_type: CMOS
• resolution: Not specified in the abstract
• dynamic_range: Not explicitly mentioned (however, performance metrics imply sensitivity to dynamic range adjustment)
• pixel_size: Not specified
• dark_current: Not specified

Optical Data

• focal_length: Not specified
• aperture: Not specified
• field_of_view: Not specified
• distortion: Not specified

Performance Metrics

Applications & Benefits

• cell_imaging: The paper refers to applications in industrial fields like automobiles and smartphones, and emphasizes interference prevention in ToF-CIS.
• benefits: The ability to discriminate signal light from interference by using code modulation improves measurement accuracy and effectiveness in various applications.

Supporting Organizations

• supported_by: New Energy and Industrial Technology Development Organization (NEDO), LAPIS Semiconductor, Tohoku University, University of Tokyo.

Manuscript Details

• publication_date: 22-28 May 2021

Relevancy Score

• score: 9
• missing_fields:
  • fill factor
  • quantum efficiency
  • readout speed
  • noise sources

Processed JSON Filename

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