An Areaefficient And Lowpower Logarithmic Ad Converter For Currentmode Sensor Array

• doi: 10.1109/JSEN.2009.2033199
• title: An Area-Efficient and Low-Power Logarithmic A/D Converter for Current-Mode Sensor Array
• publisher: IEEE
• isbn:
• issn: 2379-9153
• rank: 1482
• access_type: LOCKED
• content_type: Journals
• abstract: This paper presents an area-efficient and low-power current-mode logarithmic analog-to-digital converter (LADC) that can be potentially used for large-scale CMOS sensor array applications. The core of the proposed LADC consists of a novel analog functional block and a reference transistor working in the subthreshold region, which encodes the input sensor currents into logarithmically compressed voltage outputs. The LADC core has been implemented in standard 0.18 ¿m CMOS process with a total area of 55 ¿m × 55 ¿m and a power consumption of less than 9.7 ¿W. A 7-bit digital counter and an external discrete ramp generator, typically shared among all sensor unit cells in the future sensor array implementation, complete the LADC configuration. Measurement results have presented a dynamic range of 80 dB with 5 KS/s conversion rate. The proposed LADC is ideally suited for compact and low-power CMOS biomedical sensor arrays or CMOS image sensor applications.
• article_number: 5310985
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5310985
• html_url: https://ieeexplore.ieee.org/document/5310985/
• abstract_url: https://ieeexplore.ieee.org/document/5310985/
• publication_title: IEEE Sensors Journal
• conference_location:
• conference_dates:
• publication_number: 7361
• is_number: 5290388
• publication_year: 2009
• publication_date: Dec. 2009
• start_page: 2042
• end_page: 2043
• citing_paper_count: 6
• citing_patent_count: 0
• download_count: 792
• insert_date: 20091110
• index_terms:
  • ieee_terms:
    • Sensor arrays
    • Biosensors
    • CMOS image sensors
    • Analog-digital conversion
    • Large-scale systems
    • Voltage
    • CMOS process
    • Energy consumption
    • Counting circuits
    • Biomedical measurements
  • author_terms:
    • CMOS sensor array
    • high dynamic range
    • logarithmic analog-to-digital converter
    • low-power
  • dynamic_index_terms:
    • Sensor Array
    • Dynamic Range
    • Power Consumption
    • Conversion Rate
    • Sensor Inputs
    • Sensor Unit
    • Large-scale Array
    • Negative Feedback Loop
    • Inverter
    • Current Reference
    • Data Conversion
    • Conversational Data
    • High Dynamic Range
    • Input Current
• 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: Not specified
• dynamic_range: 80 dB
• pixel_size: Not specified
• 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: 5 KS/s
• power_consumption: Less than 9.7 mW

Applications & Benefits

• cell_imaging: The proposed LADC is ideally suited for compact and low-power CMOS biomedical sensor arrays or CMOS image sensor applications.
• benefits: High-speed, high dynamic range data conversion with low power consumption.

Supporting Organizations

• supported_by: MOSIS educational program

Manuscript Details

• publication_date: Dec. 2009

Relevancy Score

• score: 8
• missing_fields:
  • resolution
  • pixel_size
  • dark_current
  • focal_length
  • aperture
  • field_of_view
  • distortion
  • signal_to_noise_ratio
  • sensitivity
  • shutter_speed
  • noise

Processed JSON Filename

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