Columnparallel Continuoustime Adc With Implicit Frontend Variable Gain Amplifier

• doi: 10.1109/MWSCAS.2013.6674633
• title: Column-parallel continuous-time ΣΔ ADC with implicit front-end variable gain amplifier
• publisher: IEEE
• isbn: 978-1-4799-0066-4
• issn: 1558-3899
• rank: 1956
• access_type: LOCKED
• content_type: Conferences
• abstract: This paper presents a column-parallel continuous-time sigma delta (CTSD) ADC for mega pixel resolution CMOS image sensor (CIS). The sigma delta modulator is implemented with a 2nd order resistor/capacitor-based loop filter. The variable gain amplifier in the traditional column-parallel read-out circuit is merged into the front-end of the CTSD modulator. By programming the input resistance, the amplitude range of the input current can be tuned with 8 scales, which is equivalent to a traditional 2-bit pre-amplification function without consuming extra power and chip area. The test chip prototype is fabricated using 0.18 μm CMOS process and the measurement result shows an ADC power consumption lower than 63.5 μW under 1.4 V power supply and 50 MHz clock frequency.
• article_number: 6674633
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6674633
• html_url: https://ieeexplore.ieee.org/document/6674633/
• abstract_url: https://ieeexplore.ieee.org/document/6674633/
• publication_title: 2013 IEEE 56th International Midwest Symposium on Circuits and Systems (MWSCAS)
• conference_location: Columbus, OH, USA
• conference_dates: 4-7 Aug. 2013
• publication_number: 6653322
• is_number: 6674559
• publication_year: 2013
• publication_date: 4-7 Aug. 2013
• start_page: 253
• end_page: 256
• citing_paper_count: 0
• citing_patent_count: 0
• download_count: 409
• insert_date: 20131202
• index_terms:
  • ieee_terms:
    • Dynamic range
    • Sigma-delta modulation
    • Modulation
    • Resistors
    • CMOS image sensors
    • Signal to noise ratio
  • dynamic_index_terms:
    • Variable Gain
    • Variable Gain Amplifier
    • Power Consumption
    • 2nd Order
    • Input Current
    • Clock Frequency
    • CMOS Process
    • Chip Area
    • Loop Filter
    • Delta-sigma
    • Sigma-delta
    • Dynamic Range
    • Input Signal
    • Input Voltage
    • Supply Voltage
    • Prior Art
    • Extensive Dynamics
    • Master Clock
    • Signal-to-noise Ratio Improvement
    • Nonlinear Error
    • Output Code
    • Resistance R1
    • Control Words
• isbn_formats:
  • format: Electronic ISBN, value: 978-1-4799-0066-4, isbnType: New-2005
• authors:
  • Author Name: Fang Tang
    Affiliation: College of Communication Engineering, Chongqing University, Chongqing, China
    Author URL: https://ieeexplore.ieee.org/author/37393880400
    ID: 37393880400
    Order: 1
    Author Affiliations:
    • College of Communication Engineering, Chongqing University, Chongqing, China
  • Author Name: Yuan Cao
    Affiliation: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
    Author URL: https://ieeexplore.ieee.org/author/37072459300
    ID: 37072459300
    Order: 2
    Author Affiliations:
    • School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
  • Author Name: Xiaojin Zhao
    Affiliation: College of Electronic Science and Technology, Shenzhen University, Shenzhen, China
    Author URL: https://ieeexplore.ieee.org/author/38550947700
    ID: 38550947700
    Order: 3
    Author Affiliations:
    • College of Electronic Science and Technology, Shenzhen University, Shenzhen, China

Image Sensor

• sensor_type: CMOS
• resolution: mega pixel resolution
• dynamic_range: 74dB @ G=0, 86dB @ G=7
• 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: 50 fps
• signal_to_noise_ratio: 72dB peak SNR
• power_consumption: 63.5 μW
• noise: 0.6-LSB RMS

Applications & Benefits

• cell_imaging: CMOS image sensors suitable for cell imaging applications due to high dynamic range and low power consumption.
• benefits: Enables high-resolution imaging with low power consumption using a column-parallel design.

Supporting Organizations

• supported_by: National Natural Science Foundation of China, Natural Science Foundation of Guangdong Province, Kongque Technology Innovation Foundation of Shenzhen, Fundamental Research Foundation of Shenzhen

Manuscript Details

• publication_date: 4-7 Aug. 2013

Relevancy Score

• score: 10
• missing_fields:
  • fill factor
  • quantum efficiency
  • readout speed
  • temporal noise
  • fixed-pattern noise
  • microlenses
  • on-chip colour filters
  • global shutter
  • rolling shutter
  • backside illumination

Processed JSON Filename

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