An Autoswitched Mode Cmos Image Sensor For High Dynamic Range Scientific Imaging Applications

• doi: 10.1109/ICSENS.2008.4716454
• title: An auto-switched mode CMOS image sensor for high dynamic range scientific imaging applications
• publisher: IEEE
• isbn: 978-1-4244-2581-5
• issn: 1930-0395
• partnum: 08CH38040
• rank: 1553
• access_type: LOCKED
• content_type: Conferences
• abstract: This paper presents a CMOS image sensor with auto-switched mode readout architecture for high throughput and high dynamic range scientific imaging applications. The proposed readout circuit compares background illumination with a threshold level and automatically adjusts the pixel array to operate in either linear or logarithmic mode by feeding back a mode switching control signal. This novel readout architecture allows simultaneous linear-logarithmic operation of each pixel, resulting in direct readout of image sequence covering a dynamic range of 121 dB. A chip consisting of 16 times 16 8-T pixel array and the proposed readout circuit has been designed and fabricated using AMI 0.5 mum technology. The chip has been verified for imaging clusters of nano particles (CoFe2O4) illuminated using bright green LED. Experiment results confirm high dynamic range performance due to linear-logarithmic auto-switched mode operation.
• article_number: 4716454
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4716454
• html_url: https://ieeexplore.ieee.org/document/4716454/
• abstract_url: https://ieeexplore.ieee.org/document/4716454/
• publication_title: SENSORS, 2008 IEEE
• conference_location: Lecce, Italy
• conference_dates: 26-29 Oct. 2008
• publication_number: 4703548
• is_number: 4716361
• publication_year: 2008
• publication_date: 26-29 Oct. 2008
• start_page: 355
• end_page: 358
• citing_paper_count: 0
• citing_patent_count: 0
• download_count: 202
• insert_date: 20081216
• index_terms:
  • ieee_terms:
    • CMOS image sensors
    • Dynamic range
    • Throughput
    • Lighting
    • Switching circuits
    • Automatic control
    • Pixel
    • Image sequences
    • Ambient intelligence
    • Light emitting diodes
  • dynamic_index_terms:
    • Dynamic Range
    • Image Sensor
    • Camera Sensor
    • Dynamic Imaging
    • High Dynamic Range
    • Operation Mode
    • Control Signal
    • Linear Mode
    • Linear Transition
    • Particle Clusters
    • Pixel Array
    • Background Illumination
    • Readout Circuit
    • Logarithm
    • Log Transformed
    • Logarithmic Transformation
    • Input Signal
    • Photodiode
    • Image Reconstruction
    • Iterative Reconstruction
    • Tomographic Reconstruction
    • Photodetector
    • Photocurrent
    • Linear Operator
    • Linear Output
    • Linear Yield
    • High Dynamic Range Image
    • Pixel Block
    • High Illumination
    • Logging Operations
    • Logarithm Operation
    • Pixel Level
    • Imaging Readout
• isbn_formats:
  • format: CD, value: 978-1-4244-2581-5, isbnType: New-2005
  • format: Print ISBN, value: 978-1-4244-2580-8, isbnType: New-2005
• authors:
  • Author Name: Jian Guo
    Affiliation: Department of Electrical and Computer Engineering, Tufts University, Medford, MA, USA
    Author URL: https://ieeexplore.ieee.org/author/37654189100
    ID: 37654189100
    Order: 1
    Author Affiliations:
    • Department of Electrical and Computer Engineering, Tufts University, Medford, MA, USA
  • Author Name: Sameer Sonkusale
    Affiliation: Department of Electrical and Computer Engineering, Tufts University, Medford, MA, USA
    Author URL: https://ieeexplore.ieee.org/author/37270130100
    ID: 37270130100
    Order: 2
    Author Affiliations:
    • Department of Electrical and Computer Engineering, Tufts University, Medford, MA, USA

Image Sensor

• sensor_type: CMOS
• resolution: 16x16 pixels
• dynamic_range: 121.33 dB
• pixel_size: 23 µm x 23 µm
• dark_current: Not specified

Optical Data

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

Performance Metrics

• frame_rate: 35 fps
• sensitivity: 4.696 V/lux.s (linear), 79.98 mV/dec (logarithmic)
• noise: FPN (Linear / Log) ≤1.4213 mV rms / ≤2.31 mV rms

Applications & Benefits

• cell_imaging: High dynamic range imaging for detecting low contrast signals in high background illumination; Application for biochemical sensors in monitoring clustering of nano particles.
• benefits: High dynamic range performance due to linear-logarithmic auto-switched mode operation.

Supporting Organizations

• supported_by: MOSIS educational program

Manuscript Details

• publication_date: 26-29 Oct. 2008

Relevancy Score

• score: 9
• missing_fields:
  • quantum_efficiency
  • on_chip_color_filters
  • global_or_rolling_shutters
  • backside_illumination

Processed JSON Filename

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