An 84Bit Reconfigurable Digital Pixel Array With Onchip Nonuniform Quantizer

• doi: 10.1109/CICC.2005.1568647
• title: An 8/4-bit reconfigurable digital pixel array with on-chip non-uniform quantizer
• publisher: IEEE
• isbn: 0-7803-9023-7
• issn: 2152-3630
• partnum: 05CH37658
• rank: 1443
• access_type: LOCKED
• content_type: Conferences
• abstract: A CMOS digital pixel sensor (DPS) with reconfigurable coding (8/4-bit) and spatial (32 /spl times/ 32/64 /spl times/ 32) resolutions is proposed in this paper. The sensor is based on time domain coding which converts the photocurrent into an inversely proportional pulse width (PWM) signal. The 8-bit conversion mode is used for high quality imaging while the 4-bit conversion mode provides a shorter conversion time and a 2-fold increase in spatial resolution. In order to overcome the nonlinearity introduced in the time domain PWM coding, a linearization procedure based on nonuniform time domain quantizer is proposed. The reconfiguration features of the imager are demonstrated through experimental results obtained from a prototype designed using 1-poly, 5 metal CMOS 0.35/spl mu/m n-well standard process.
• article_number: 1568647
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1568647
• html_url: https://ieeexplore.ieee.org/document/1568647/
• abstract_url: https://ieeexplore.ieee.org/document/1568647/
• publication_title: Proceedings of the IEEE 2005 Custom Integrated Circuits Conference, 2005.
• conference_location: San Jose, CA, USA
• conference_dates: 21-21 Sept. 2005
• publication_number: 10489
• is_number: 33245
• publication_year: 2005
• publication_date: 21-21 Sept. 2005
• start_page: 223
• end_page: 226
• citing_paper_count: 7
• citing_patent_count: 0
• download_count: 198
• insert_date: 20060110
• index_terms:
  • ieee_terms:
    • Pulse width modulation
    • Space vector pulse width modulation
    • Image coding
    • CMOS technology
    • CMOS image sensors
    • Photodiodes
    • Voltage
    • Spatial resolution
    • CMOS process
    • Circuits
  • dynamic_index_terms:
    • Digital Pixel
    • Reconfigurable Array
    • Non-uniform Quantization
    • Spatial Resolution
    • Time Domain
    • Pulse Width
    • Pulsewidth Modulation
    • Photocurrent
    • Mode Conversion
    • Digital Sensor
    • Sensor Pixel
    • Dynamic Range
    • Power Consumption
    • Photodiode
    • Peak Current
    • Lookup Table
    • Image Sensor
    • Camera Sensor
    • Sensor Response
    • Comparable Yields
    • Comparator Output
    • Comparison Of Yield
    • Comparison Of Outputs
    • Control Circuit
    • Sensor Output
    • Data Bus
    • CMOS Technology
    • Digital Code
    • Clock Frequency
    • Uniform Signal
    • High Frame Rate
    • Quantization Levels
• isbn_formats:
  • format: Print ISBN, value: 0-7803-9023-7, isbnType: Historical
• authors:
  • Author Name: A. Bermak
    Affiliation: Electrical and Electronic Engineering Department, Hong Kong University of Science and Technology, Kowloon, Hong Kong, China
    Author URL: https://ieeexplore.ieee.org/author/37275353200
    ID: 37275353200
    Order: 1
    Author Affiliations:
    • Electrical and Electronic Engineering Department, Hong Kong University of Science and Technology, Kowloon, Hong Kong, China

Image Sensor

• sensor_type: CMOS
• resolution: 32×32 / 64×32
• dynamic_range: >90dB
• pixel_size: 50×50µm
• dark_current: 1.0pA

Optical Data

• focal_length: Not provided
• aperture: Not provided
• field_of_view: Not provided
• distortion: Not provided

Performance Metrics

• frame_rate: Not provided
• signal_to_noise_ratio: Not provided
• sensitivity: Not provided
• shutter_speed: Not provided
• power_consumption: 10mW
• noise: 0.8% FPN

Applications & Benefits

• cell_imaging: Not explicitly mentioned, but relevant to general applications of CMOS sensors.
• benefits: Low power consumption, reconfigurable resolutions, improved dynamic range and signal-to-noise ratio.

Supporting Organizations

• supported_by: Research Grant Council of HK SAR, China (Project No HKUST6148/03E)

Manuscript Details

• publication_date: 21-21 Sept. 2005

Relevancy Score

• score: 9
• missing_fields:
  • focal_length
  • aperture
  • field_of_view
  • distortion
  • frame_rate
  • signal_to_noise_ratio
  • sensitivity
  • shutter_speed
  • noise

Processed JSON Filename

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