An Onoff Transient Imager With Eventdriven Asynchronous Readout

• doi: 10.1109/ISCAS.2002.1010950
• title: An on/off transient imager with event-driven, asynchronous read-out
• publisher: IEEE
• isbn: 0-7803-7448-7
• issn:
• partnum: 02CH37353
• rank: 1594
• access_type: LOCKED
• content_type: Conferences
• abstract: This paper describes the implementation of a CMOS image sensor that performs a two-way rectified temporal high-pass filtering operation on the incoming visual signal. The sensor adapts to background illuminance and responds to local positive and negative illuminance transients at separately coded terminals. The transients are converted into a stream of asynchronous binary pulses, which are multiplexed onto a common address bus, where the address encodes the location of the sending pixel and the sign of the transient. Gain, response threshold, and refractory period of the pixel output signals can be regulated. The version of the imager described here has an array of 48 /spl times/ 48 pixels and was implemented with 0.35 /spl mu/m CMOS technology.
• article_number: 1010950
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1010950
• html_url: https://ieeexplore.ieee.org/document/1010950/
• abstract_url: https://ieeexplore.ieee.org/document/1010950/
• publication_title: 2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353)
• conference_location: Phoenix-Scottsdale, AZ, USA
• conference_dates: 26-29 May 2002
• publication_number: 7897
• is_number: 21785
• publication_year: 2002
• publication_date: 26-29 May 2002
• start_page: II
• end_page: II
• citing_paper_count: 23
• citing_patent_count: 5
• download_count: 606
• insert_date: 20020807
• index_terms:
  • ieee_terms:
    • CMOS technology
    • Circuits
    • Image coding
    • Pixel
    • Optical receivers
    • Optical sensors
    • Image processing
    • CMOS process
    • Biomedical optical imaging
    • Optical feedback
  • dynamic_index_terms:
    • Image Sensor
    • Camera Sensor
    • Refractory Period
    • CMOS Technology
    • Background Illumination
    • Image Processing
    • Data Rate
    • Data Evaluation
    • Multiplexing
    • Focal Plane
    • Back Focal Plane
    • Arbitration
    • Low Power Consumption
    • Column Array
• isbn_formats:
  • format: Print ISBN, value: 0-7803-7448-7, isbnType: Historical
• authors:
  • Author Name: J. Kramer
    Affiliation: Institute of Neuroinformatics, University of Zurich, ETH Zurich, Zurich, Switzerland
    Author URL: https://ieeexplore.ieee.org/author/37340309500
    ID: 37340309500
    Order: 1
    Author Affiliations:
    • Institute of Neuroinformatics, University of Zurich, ETH Zurich, Zurich, Switzerland

Image Sensor

• sensor_type: CMOS
• resolution: 48x48 pixels
• dynamic_range: 66 dB
• pixel_size: 32.8 µm
• dark_current: 2.82 x 10^-7 e-/s

Optical Data

• focal_length: 2.5 mm
• aperture: Not specified
• field_of_view: Not specified
• distortion: Not specified

Performance Metrics

• frame_rate: 20 MHz
• power_consumption: Quiescent: 2.25 mW; Maximum activity: 55.85 mW
• noise: 7.08 x 10^7 e-/s (1.13 pA) for full-field activation

Applications & Benefits

• cell_imaging: Not specified
• benefits: Efficient signal coding, noise suppression, low DC power consumption, suitable for high-speed data communication and image processing modules.

Supporting Organizations

• supported_by: Swiss National Foundation Research Grant

Manuscript Details

• publication_date: 26-29 May 2002

Relevancy Score

• score: 10

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