A Low Dark Current Wide Dynamic Range Cmos Pixel

• doi: 10.1109/ISCAS.2016.7539106
• title: A low dark current wide dynamic range CMOS pixel
• publisher: IEEE
• isbn: 978-1-4799-5342-4
• issn: 2379-447X
• rank: 1122
• access_type: LOCKED
• content_type: Conferences
• abstract: CMOS Image Sensors have a limited dynamic range. The need to increase the capability of imaging at a broad range of light intensities is of relevant interest in automotive and scientific applications. However, sensors that resolve the dynamic range issues, like logarithmic pixels, suffer from poor performance under low light conditions. This limitation is due to the inherent leakage current that flows through the photosensitive diode even in absence of light, and is hence referred to as dark current. The typical approaches to reduce this leakage current involve process modifications, which are costly, risky, time consuming and often not in the control of the designer. In this paper, a novel pixel design capable of reducing dark current without any process modifications is proposed. The pixel biases a diode at zero potential to reduce the leakage current. This pixel's architecture is based on a double current mirror to maintain the voltage drop on the photodiode as close to zero as possible. In addition, the pixel provides a logarithmic response, thereby capturing a wide dynamic range of intensities. Simulations results are reported showing that this architecture effectively achieves a small potential value on the photodiode.
• article_number: 7539106
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7539106
• html_url: https://ieeexplore.ieee.org/document/7539106/
• abstract_url: https://ieeexplore.ieee.org/document/7539106/
• publication_title: 2016 IEEE International Symposium on Circuits and Systems (ISCAS)
• conference_location: Montreal, QC, Canada
• conference_dates: 22-25 May 2016
• publication_number: 7515073
• is_number: 7527154
• publication_year: 2016
• publication_date: 22-25 May 2016
• start_page: 2523
• end_page: 2526
• citing_paper_count: 5
• citing_patent_count: 0
• download_count: 697
• insert_date: 20160811
• index_terms:
  • ieee_terms:
    • Dark current
    • Photodiodes
    • Dynamic range
    • Mirrors
    • Threshold voltage
    • Photoconductivity
    • MOS devices
  • dynamic_index_terms:
    • Dynamic Range
    • Dark Current
    • Current Pixel
    • Low Dark Current
    • Low Current Range
    • CMOS Pixel
    • Simulation Results
    • Low Light
    • Voltage Drop
    • Potential Drop
    • IR Drop
    • Scientific Applications
    • Image Sensor
    • Camera Sensor
    • Low Light Conditions
    • Limited Dynamic Range
    • Wide Range Of Intensities
    • Current Mirror
    • Monte Carlo Simulation
    • Monte Carlo Method
    • Aspect Ratio
    • Bias Voltage
    • Threshold Voltage
    • Drain-source Current
    • Source-drain Current
    • Types Of Pixels
    • Drain Source
    • High Dynamic Range
    • Gate Source
    • Drain Current
    • Drain-source Voltage
    • Source-drain Voltage
    • Application Of Voltage
• isbn_formats:
  • format: Print on Demand(PoD) ISBN, value: 978-1-4799-5342-4, isbnType: New-2005
  • format: USB ISBN, value: 978-1-4799-5340-0, isbnType: New-2005
  • format: Electronic ISBN, value: 978-1-4799-5341-7, isbnType: New-2005
• authors:
  • Author Name: Alessandro Michel Brunetti
    Affiliation: Department of Engineering Science, University of Oxford, Oxford, UK
    Author URL: https://ieeexplore.ieee.org/author/37085990349
    ID: 37085990349
    Order: 1
    Author Affiliations:
    • Department of Engineering Science, University of Oxford, Oxford, UK
  • Author Name: Bhaskar Choubey
    Affiliation: Department of Engineering Science, University of Oxford, Oxford, UK
    Author URL: https://ieeexplore.ieee.org/author/37274571900
    ID: 37274571900
    Order: 2
    Author Affiliations:
    • Department of Engineering Science, University of Oxford, Oxford, UK

Image Sensor

• sensor_type: CMOS
• resolution: Not explicitly stated
• dynamic_range: 2-3 decades
• pixel_size: Not explicitly stated
• dark_current: Not explicitly stated

Optical Data

• focal_length: Not explicitly stated
• aperture: Not explicitly stated
• field_of_view: Not explicitly stated
• distortion: Not explicitly stated

Performance Metrics

• frame_rate: Not explicitly stated
• signal_to_noise_ratio: Not explicitly stated
• sensitivity: Not explicitly stated
• shutter_speed: Not explicitly stated
• power_consumption: Not explicitly stated
• noise: Not explicitly stated

Applications & Benefits

• cell_imaging: X-Ray imaging and scientific applications
• benefits: High dynamic range and low dark current improve imaging capabilities

Supporting Organizations

• supported_by: European Commission (Marie Curie Actions, FP7-People Programme)

Manuscript Details

• publication_date: 22-25 May 2016

Relevancy Score

• score: 9
• missing_fields:
  • resolution
  • pixel_size
  • dark_current
  • focal_length
  • aperture
  • field_of_view
  • distortion
  • frame_rate
  • signal_to_noise_ratio
  • sensitivity
  • shutter_speed
  • power_consumption
  • noise

Processed JSON Filename

request_7cf0f94f-58c7-4de4-859f-5de48ccf5212-a_low_dark_current_wide_dynamic_range_cmos_pixel.json