A Cmos Image Sensor With Spiking Pixels For Retinal Stimulation

• doi: 10.1109/ISCAS.2008.4541726
• title: A CMOS image sensor with spiking pixels for retinal stimulation
• publisher: IEEE
• isbn: 978-1-4244-1684-4
• issn: 2158-1525
• partnum: 08CH37954
• rank: 623
• access_type: LOCKED
• content_type: Conferences
• abstract: This paper presents a CMOS image sensor intended for a novel optoelectronic retinal prosthesis. Each pixel acts as an independent oscillator, whose frequency is controlled by the incident light intensity. A 9 × 9 pixel array was fabricated in AMS 0.35 μm CMOS Opto Process. Each pixel’s area amounts to 25600 μm2 with the array occupying 2.89 mm2. Measured results show that the sensor achieves an overall dynamic range of 143 dB (from 34 mHz to 502 KHz) when the controlling bias current value varies from 0.2 pA to 5 μA respectively. Similarly, when the incident light intensity varies from 0.35 μW/cm2 to 3.5 mW/cm2, the pixel’s oscillation frequency changes from 0.24 Hz to 2.2 KHz respectively. This performance suffices for the optical stimulation of photosensitized RGCs.
• article_number: 4541726
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4541726
• html_url: https://ieeexplore.ieee.org/document/4541726/
• abstract_url: https://ieeexplore.ieee.org/document/4541726/
• publication_title: 2008 IEEE International Symposium on Circuits and Systems (ISCAS)
• conference_location: Seattle, WA, USA
• conference_dates: 18-21 May 2008
• publication_number: 4534149
• is_number: 4541329
• publication_year: 2008
• publication_date: 18-21 May 2008
• start_page: 1548
• end_page: 1551
• citing_paper_count: 2
• citing_patent_count: 0
• download_count: 163
• insert_date: 20080613
• index_terms:
  • ieee_terms:
    • CMOS image sensors
    • Pixel
    • Retina
    • Frequency
    • Prosthetics
    • Oscillators
    • Lighting control
    • CMOS process
    • Current measurement
    • Dynamic range
  • dynamic_index_terms:
    • Image Sensor
    • Camera Sensor
    • Light Intensity
    • Oscillation Frequency
    • Bias Current
    • Incident Light Intensity
    • Pixel Array
    • Retinal Prosthesis
    • Visual Prostheses
    • Artificial Retina
    • Pulse Width
    • Pulsewidth Modulation
    • Pulse Wave
    • Pulse Train
    • Age-related Macular Degeneration
    • Signal Frequency
    • Inverter
    • Convolution Kernel
    • Control Unit
    • Oscillation Amplitude
    • Edge Detection
    • Parasitic Capacitance
    • Ring Current
    • Current Mirror
    • Microlens Array
    • Micro Lens Arrays
    • Input Stage
    • Clock Signal
    • Wide Tuning Range
    • Wide Signal
• isbn_formats:
  • format: CD, value: 978-1-4244-1684-4, isbnType: New-2005
  • format: Print ISBN, value: 978-1-4244-1683-7, isbnType: New-2005
• authors:
  • Author Name: Yan Huang
    Affiliation: Imperial College London, London, London, GB
    Author URL: https://ieeexplore.ieee.org/author/37087894397
    ID: 37087894397
    Order: 1
    Author Affiliations:
    • Imperial College London, London, London, GB
  • Author Name: Emmanuel M. Drakakis
    Affiliation: Imperial College London, London, London, GB
    Author URL: https://ieeexplore.ieee.org/author/37294289400
    ID: 37294289400
    Order: 2
    Author Affiliations:
    • Imperial College London, London, London, GB
  • Author Name: Chris Toumazou
    Affiliation: Institute of Biomedical Engineering, Imperial College London, UK
    Author URL: https://ieeexplore.ieee.org/author/37271540100
    ID: 37271540100
    Order: 3
    Author Affiliations:
    • Institute of Biomedical Engineering, Imperial College London, UK
  • Author Name: Patrick Degenaar
    Affiliation: Institute of Biomedical Engineering, Imperial College London, UK
    Author URL: https://ieeexplore.ieee.org/author/37550255500
    ID: 37550255500
    Order: 4
    Author Affiliations:
    • Institute of Biomedical Engineering, Imperial College London, UK

Image Sensor

• sensor_type: CMOS
• resolution: 9x9 pixels
• dynamic_range: 143 dB
• pixel_size: 160 μm x 160 μm
• dark_current: 45 pA/cm² at 27°C, 200 nA/mm² at 125°C

Optical Data

• focal_length:
• aperture:
• field_of_view:
• distortion:

Performance Metrics

• frame_rate:
• signal_to_noise_ratio:
• sensitivity:
• shutter_speed:
• power_consumption: 50 nW/pixel
• noise:

Applications & Benefits

• cell_imaging: Optoelectronic retinal prosthesis aims to restore lost vision by light stimulation of photosensitized retinal ganglion cells (RGCs).
• benefits: Non-invasive remote control over cell activities, flexible stimulation points.

Supporting Organizations

• supported_by: Imperial College London, AMS (austriamicrosystems)

Manuscript Details

• publication_date: 18-21 May 2008

Relevancy Score

• score: 9
• missing_fields:
  • readout_speed
  • noise_sources
  • analog_to_digital_conversion_techniques
  • microlenses
  • on_chip_colour_filters
  • global_or_rolling_shutters
  • backside_illumination

Processed JSON Filename

request_251d0ba3-9cd1-462b-b877-6e728e005289-a_cmos_image_sensor_with_spiking_pixels_for_retinal_stimulation.json