A Multiple Operation Mode Cmos Digital Pixel Sensor Dedicated To A Visual Cortical Implant

• doi: 10.1109/MWSCAS.2004.1354004
• title: A multiple operation mode CMOS digital pixel sensor dedicated to a visual cortical implant
• publisher: IEEE
• isbn: 0-7803-8346-X
• issn:
• partnum: 04CH37540
• rank: 1181
• access_type: LOCKED
• content_type: Conferences
• abstract: A CMOS image sensor with pixel level analog to digital conversion is presented. The circuit of each pixel contains a photodiode, with a fill factor of 21%, a shutter/follower, a comparator and a storing unit, for a total of 44 transistors. The comparator uses the maximum voltage swing available and is insensitive to fabrication process variations. A digital to analog converter is used to deliver a voltage reference in order to compare it with the pixel voltage for the analog to digital conversion. The digital value of the pixel voltage is stored in an 8-bit DRAM. The circuit can operate in one of the three following modes: logarithmic, linear integration or differential. The first two modes are used for image capture and the third mode is used for an active range finder system. All these modes are required by a visual cortical implant. The circuit layout of a pixel is being fabricated in CMOS 0.18 /spl mu/m technology, and a matrix of 45/spl times/90 pixels was submitted for fabrication.
• article_number: 1354004
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1354004
• html_url: https://ieeexplore.ieee.org/document/1354004/
• abstract_url: https://ieeexplore.ieee.org/document/1354004/
• publication_title: The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.
• conference_location: Hiroshima, Japan
• conference_dates: 25-28 July 2004
• publication_number: 9366
• is_number: 29746
• publication_year: 2004
• publication_date: 25-28 July 2004
• start_page: I
• end_page: 369
• citing_paper_count: 5
• citing_patent_count: 0
• download_count: 163
• insert_date: 20041115
• index_terms:
  • ieee_terms:
    • Implants
    • Voltage
    • Circuits
    • CMOS image sensors
    • Analog-digital conversion
    • Fabrication
    • CMOS technology
    • Pixel
    • Photodiodes
    • Digital-analog conversion
  • dynamic_index_terms:
    • Operation Mode
    • Digital Sensor
    • Sensor Pixel
    • Digital Pixel
    • Cortical Implants
    • Scan Range
    • Photodiode
    • Analog-to-digital Converter
    • Analog-to-digital
    • Digital-to-analog Converter
    • Image Sensor
    • Camera Sensor
    • Voltage Values
    • Digital Value
    • Linear Integration
    • Signal-to-noise
    • Signal-to-noise Ratio
    • Time And Space
    • Spacetime
    • Function Of Time
    • Dynamic Range
    • System Architecture
    • Inverter
    • Photocurrent
    • Differential Modulation
    • Modulation Of Differentiation
    • Comparable Yields
    • Comparator Output
    • Comparison Of Yield
    • Comparison Of Outputs
    • Pixel Spacing
    • Pixel Time
    • Time For Each Pixel
    • Consecutive Images
    • Linear Mode
    • Linear Transition
    • Ambient Light
    • Gate Electrode
    • Current Mirror
• isbn_formats:
  • format: Print ISBN, value: 0-7803-8346-X, isbnType: Historical
• authors:
  • Author Name: A. Trepanier
    Affiliation: PolyStim Neurotechnologies Laboratory, Department of Electrical Engineering, École Polytechnique de Montréal, QUE, Canada
    Author URL: https://ieeexplore.ieee.org/author/37281574300
    ID: 37281574300
    Order: 1
    Author Affiliations:
    • PolyStim Neurotechnologies Laboratory, Department of Electrical Engineering, École Polytechnique de Montréal, QUE, Canada
  • Author Name: J.-L. Trepanier
    Affiliation: PolyStim Neurotechnologies Laboratory, Department of Electrical Engineering, École Polytechnique de Montréal, QUE, Canada
    Author URL: https://ieeexplore.ieee.org/author/38185010200
    ID: 38185010200
    Order: 2
    Author Affiliations:
    • PolyStim Neurotechnologies Laboratory, Department of Electrical Engineering, École Polytechnique de Montréal, QUE, Canada
  • Author Name: M. Sawan
    Affiliation: PolyStim Neurotechnologies Laboratory, Department of Electrical Engineering, École Polytechnique de Montréal, QUE, Canada
    Author URL: https://ieeexplore.ieee.org/author/37276702600
    ID: 37276702600
    Order: 3
    Author Affiliations:
    • PolyStim Neurotechnologies Laboratory, Department of Electrical Engineering, École Polytechnique de Montréal, QUE, Canada
  • Author Name: Y. Audet
    Affiliation: PolyStim Neurotechnologies Laboratory, Department of Electrical Engineering, École Polytechnique de Montréal, QUE, Canada
    Author URL: https://ieeexplore.ieee.org/author/37273900300
    ID: 37273900300
    Order: 4
    Author Affiliations:
    • PolyStim Neurotechnologies Laboratory, Department of Electrical Engineering, École Polytechnique de Montréal, QUE, Canada

Image Sensor

• sensor_type: CMOS
• resolution: 45x90 pixels
• dynamic_range: Not specified in the text
• pixel_size: 16µm x 16µm
• dark_current: Not specified in the text

Optical Data

• focal_length: Not specified in the text
• aperture: Not specified in the text
• field_of_view: Not specified in the text
• distortion: Not specified in the text

Performance Metrics

• frame_rate: up to 5000 frames/s
• signal_to_noise_ratio: Not specified in the text
• sensitivity: Not specified in the text
• shutter_speed: Not specified in the text
• power_consumption: Not specified in the text
• noise: Not specified in the text

Applications & Benefits

• cell_imaging: Utilized in visual cortical implants to create artificial vision for the blind
• benefits: Supports multiple operation modes for applications requiring wide dynamic range and active range finding.

Supporting Organizations

• supported_by: NSERC, Canadian Microelectronics Corporation

Manuscript Details

• publication_date: 25-28 July 2004

Relevancy Score

• score: 10
• missing_fields:
  • quantum efficiency
  • readout speed
  • noise sources
  • analog-to-digital conversion techniques
  • use of microlenses
  • on-chip colour filters
  • global or rolling shutters
  • backside illumination

Processed JSON Filename

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