Currentmirrorbased Potentiostats For Threeelectrode Amperometric Electrochemical Sensors

• doi: 10.1109/TCSI.2008.2005927
• title: Current-Mirror-Based Potentiostats for Three-Electrode Amperometric Electrochemical Sensors
• publisher: IEEE
• isbn:
• issn: 1558-0806
• rank: 2025
• access_type: LOCKED
• content_type: Journals
• abstract: We present a new circuit topology for potentiostats that interface with three-electrode amperometric electrochemical sensors. In this new topology, a current-copying circuit, e.g., a current mirror, is placed in the sensor current path to generate a mirrored image of the sensor current. The mirrored image is then measured and processed instead of the sensor current itself. The new potentiostat topology consumes very low power, occupies a very small die area, and has potentially very low noise. These characteristics make the new topology very suitable for portable or bioimplantable applications. In order to demonstrate the feasibility of the new topology, we present the results of a potentiostat circuit implemented in a 0.18-mum CMOS process. The circuit converts the sensor current to a frequency-modulated pulse waveform, for which the time difference between two consecutive pulses is inversely proportional to the sensor current. The potentiostat measures the sensor current from 1 nA to 1 muA with better than 0.1% of accuracy. It consumes only 70 muW of power from a 1.8-V supply voltage and occupies an area of 0.02 mm2.
• article_number: 4629303
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4629303
• html_url: https://ieeexplore.ieee.org/document/4629303/
• abstract_url: https://ieeexplore.ieee.org/document/4629303/
• publication_title: IEEE Transactions on Circuits and Systems I: Regular Papers
• conference_location:
• conference_dates:
• publication_number: 8919
• is_number: 5153552
• publication_year: 2009
• publication_date: July 2009
• start_page: 1339
• end_page: 1348
• citing_paper_count: 149
• citing_patent_count: 7
• download_count: 5370
• insert_date: 20080919
• index_terms:
  • ieee_terms:
    • Amperometric sensors
    • Circuit topology
    • Sensor phenomena and characterization
    • Image sensors
    • Biosensors
    • Current measurement
    • Pulse circuits
    • Mirrors
    • Image generation
    • Circuit noise
  • author_terms:
    • Amperometric sensor
    • current mirror
    • electrochemical sensor
    • frequency compensation
    • potentiostat
  • dynamic_index_terms:
    • Electrochemical Sensors
    • Time Difference
    • Low Noise
    • Supply Voltage
    • CMOS Process
    • Consecutive Pulses
    • Current Mirror
    • Impedance
    • Resistivity
    • Active Components
    • Equivalent Circuit
    • Electrochemical Impedance Spectroscopy
    • Electrochemical Reaction
    • Low Power Consumption
    • Electrochemical Cell
    • Battery Cells
    • Current Sensor
    • Parasitic Capacitance
    • Circuit Performance
    • Circuit Operation
    • Operational Amplifier
    • Op-amp
    • Loop Stability
    • Amplification Stage
    • Dominant Pole
    • Electrochemical Impedance Spectroscopy Experiments
    • Transimpedance Amplifier
    • Working Electrode Surface
    • Glucose Biosensor
    • Pole Position
    • Three-electrode Electrochemical Cell
• authors:
  • Author Name: Mohammad Mahdi Ahmadi
    Affiliation: Sound Design Technologies Limited, Burlington, ONT, Canada
    Author URL: https://ieeexplore.ieee.org/author/37276374800
    ID: 37276374800
    Order: 1
    Author Affiliations:
    • Sound Design Technologies Limited, Burlington, ONT, Canada
  • Author Name: Graham A. Jullien
    Affiliation: Department of Electrical and Computer Engineering, University of Calgary, Calgary, AB, Canada
    Author URL: https://ieeexplore.ieee.org/author/37276214100
    ID: 37276214100
    Order: 2
    Author Affiliations:
    • Department of Electrical and Computer Engineering, University of Calgary, Calgary, AB, Canada

Image Sensor

• sensor_type: CMOS
• resolution: Not specified
• 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

• power_consumption: 70 µW

Applications & Benefits

• cell_imaging: Not specified
• benefits: Suitable for portable or bioimplanted applications.

Supporting Organizations

• supported_by: Natural Sciences and Engineering Research Council of Canada, Alberta Informatics Circle of Research Excellence, Micronet R&D.

Manuscript Details

• publication_date: July 2009

Relevancy Score

• score: 3
• missing_fields:
  • resolution
  • dynamic_range
  • pixel_size
  • dark_current
  • focal_length
  • aperture
  • field_of_view
  • distortion
  • frame_rate
  • signal_to_noise_ratio
  • sensitivity
  • shutter_speed
  • noise

Processed JSON Filename

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