A Powerefficient Signalspecific Adc For Sensorinterface Applications

• doi: 10.1109/TCSII.2016.2622161
• title: A Power-Efficient Signal-Specific ADC for Sensor-Interface Applications
• publisher: IEEE
• isbn:
• issn: 1558-3791
• rank: 885
• access_type: LOCKED
• content_type: Journals
• abstract: A novel signal-specific power-efficient analog-to-digital converter (ADC) is proposed for sensor-interface applications. Instead of digitizing each analog sample independently, the proposed ADC determines the digital code corresponding to each new input sample by digitizing the difference of two consecutive samples. Therefore, for the applications with low-varying input signals, such as image sensors and ECG readouts, the difference of two consecutive samples is much smaller than the ADC full-scale range for the majority of the input samples, the power consumption of the capacitive digital-to-analog converter, the comparator, and the digital circuits of the proposed ADC is saved due to reducing the ADC activity. The prototype was fabricated using a 0.18-μm CMOS technology. Measurement results of 1 V, 8 bit, 20 kS/s ADC confirm that for a 10-kHz input sine wave, the effective number of bits is 7 while the power consumption of the entire ADC is 1.12 μW. However, for the same sampling rate, the power consumption is only 106 nW for a low-varying 100-Hz input sine wave.
• article_number: 7707378
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7707378
• html_url: https://ieeexplore.ieee.org/document/7707378/
• abstract_url: https://ieeexplore.ieee.org/document/7707378/
• publication_title: IEEE Transactions on Circuits and Systems II: Express Briefs
• conference_location:
• conference_dates:
• publication_number: 8920
• is_number: 8016697
• publication_year: 2017
• publication_date: Sept. 2017
• start_page: 1032
• end_page: 1036
• citing_paper_count: 15
• citing_patent_count: 0
• download_count: 1277
• insert_date: 20161026
• index_terms:
  • ieee_terms:
    • Power demand
    • Quantization (signal)
    • Radiation detectors
    • Clocks
    • Electrocardiography
    • Digital circuits
  • author_terms:
    • Difference analog-to-digital converter (ADC)
    • low power
    • sensor-interface circuits
  • dynamic_index_terms:
    • Power Consumption
    • Input Signal
    • Input Samples
    • Analog-to-digital Converter
    • Analog-to-digital
    • Digital-to-analog Converter
    • Image Sensor
    • Camera Sensor
    • Sine Wave
    • CMOS Technology
    • Digital Circuits
    • Digital Circuitry
    • Digital Code
    • Analogous Samples
    • Signal-to-noise
    • Signal-to-noise Ratio
    • Deviation Values
    • Difference Values
    • Standard Imaging
    • Power Efficiency
    • Quantization Error
    • Amount Of Error
    • Image Signal
    • Supply Voltage
    • Error Accumulation
    • Electrocardiogram Signals
    • Clock Cycles
    • Readout Circuit
• authors:
  • Author Name: Ehsan Rahiminejad
    Affiliation: Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
    Author URL: https://ieeexplore.ieee.org/author/37400061700
    ID: 37400061700
    Order: 1
    Author Affiliations:
    • Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
  • Author Name: Mehdi Saberi
    Affiliation: Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
    Author URL: https://ieeexplore.ieee.org/author/37409835800
    ID: 37409835800
    Order: 2
    Author Affiliations:
    • Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
  • Author Name: Reza Lotfi
    Affiliation: Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
    Author URL: https://ieeexplore.ieee.org/author/37270066800
    ID: 37270066800
    Order: 3
    Author Affiliations:
    • Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
    • Microelectronics Department, Delft University of Technology, Delft, The Netherlands

Image Sensor

• sensor_type: CMOS
• resolution: 128x128
• dynamic_range: Not specified
• 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: 20 kS/s
• signal_to_noise_ratio: 43.5 dB
• power_consumption: 224 nW for image, 1.12 µW for full-scale 10-kHz sine wave

Applications & Benefits

• cell_imaging: Relevant for image sensor applications with reduced power consumption for low-varying input signals.
• benefits: Power-efficient for applications with low-varying input signals.

Supporting Organizations

• supported_by: Ferdowsi University of Mashhad, Delft University of Technology

Manuscript Details

• publication_date: Sept. 2017

Relevancy Score

• score: 10
• missing_fields:
  • fill factor
  • quantum efficiency
  • readout speed
  • noise sources

Processed JSON Filename

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