An Analog Design Technique For Smartpixel Cmos Chips

• doi:
• title: An Analog Design Technique for Smart-Pixel CMOS Chips
• publisher: IEEE
• isbn: 2-86335-134-X
• issn:
• rank: 1472
• access_type: LOCKED
• content_type: Conferences
• abstract: This paper presents a systematic approach to design smart-pixel chips in standard CMOS technologies. These chips include light sensors together with parallel analog signal-processing circuitry, on the same silicon substrate. Light detection is made with vertical CMOS-compatible BJTs, which yield contrasts larger by an order of magnitude than conventional photodiodes. A Darlington structure is presented to further amplify the phototransistor current directly at the sensors plane. Pixel smartness is achieved by exploiting the Cellular Neural Network computation paradigm, incorporating at each pixel an analog computing unit (cell) which interacts with the cells of nearby pixels. Despite this local interaction, global tasks are performed on the two-dimensional signal, due to spatial propagation within the network. We propose a current-mode technique for CNN-based smart pixel chips and give measurements from a 1.6μm CMOS 16×16 pixels prototype to calculate the number of connected pieces within each row of pixels of an input image.
• article_number: 5467948
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5467948
• html_url: https://ieeexplore.ieee.org/document/5467948/
• abstract_url: https://ieeexplore.ieee.org/document/5467948/
• publication_title: ESSCIRC '93: Nineteenth European Solid-State Circuits Conference
• conference_location: Seville, Spain
• conference_dates: 22-24 Sept. 1993
• publication_number: 5467852
• is_number: 5467859
• publication_year: 1993
• publication_date: 22-24 Sept. 1993
• start_page: 78
• end_page: 81
• citing_paper_count: 1
• citing_patent_count: 0
• download_count: 93
• insert_date: 20100601
• index_terms:
  • ieee_terms:
    • CMOS technology
    • Smart pixels
    • Analog computers
    • Computer networks
    • Circuits
    • Silicon
    • Photodiodes
    • Phototransistors
    • Cellular neural networks
    • Current measurement
  • dynamic_index_terms:
    • Photodetector
    • Light Detection
    • Global Task
    • Phototransistor
    • Smartness
    • Standard CMOS
    • Current Source
    • Current Regulations
    • Current Ratio
    • Basic Building Blocks
    • Complete Darkness
    • Current Mirror
• isbn_formats:
  • format: Print ISBN, value: 2-86335-134-X, isbnType: Historical
• authors:
  • Author Name: S. Espejo
    Affiliation: Department of Analog Design,Edificio CICA, CNM, Seville, Spain
    Author URL: https://ieeexplore.ieee.org/author/37274931800
    ID: 37274931800
    Order: 1
    Author Affiliations:
    • Department of Analog Design,Edificio CICA, CNM, Seville, Spain
  • Author Name: A. Rodriguez-Vazquez
    Affiliation: Department of Analog Design,Edificio CICA, CNM, Seville, Spain
    Author URL: https://ieeexplore.ieee.org/author/38274433100
    ID: 38274433100
    Order: 2
    Author Affiliations:
    • Department of Analog Design,Edificio CICA, CNM, Seville, Spain
  • Author Name: R. Dominguez-Castro
    Affiliation: Department of Analog Design,Edificio CICA, CNM, Seville, Spain
    Author URL: https://ieeexplore.ieee.org/author/38344345200
    ID: 38344345200
    Order: 3
    Author Affiliations:
    • Department of Analog Design,Edificio CICA, CNM, Seville, Spain
  • Author Name: J.L. Huertas
    Affiliation: Department of Analog Design,Edificio CICA, CNM, Seville, Spain
    Author URL: https://ieeexplore.ieee.org/author/37266241900
    ID: 37266241900
    Order: 4
    Author Affiliations:
    • Department of Analog Design,Edificio CICA, CNM, Seville, Spain
  • Author Name: E. Sanchez-Sinencio
    Affiliation: Department of Electrical Engineering, Texas A and M University, College Station, TX, USA
    Author URL: https://ieeexplore.ieee.org/author/37269843200
    ID: 37269843200
    Order: 5
    Author Affiliations:
    • Department of Electrical Engineering, Texas A and M University, College Station, TX, USA

Image Sensor

• sensor_type: CMOS
• resolution: 16x16 pixels
• dynamic_range: 100 dB
• pixel_size: 1.6 µm
• dark_current: between 2.3 and 215 pA depending on configuration

Optical Data

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

Performance Metrics

• power_consumption: 100 µW per cell
• noise: detected noise levels depend on current flow and environmental conditions

Applications & Benefits

• cell_imaging: Used for connected component detection and various imaging tasks.
• benefits: Reduces area and improves speed/power figures compared to previous implementations.

Supporting Organizations

• supported_by: EUROCHIP consortium

Manuscript Details

• publication_date: 22-24 Sept. 1993

Relevancy Score

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

Processed JSON Filename

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