Search or filter publications

Filter by type:

Filter by publication type

Filter by year:

to

Results

  • Showing results for:
  • Reset all filters

Search results

  • CONFERENCE PAPER
    Leene LB, Liu Y, Constandinou TG, 2013,

    A Compact Recording Array for Neural Interfaces

    , IEEE Biomedical Circuits and Systems Conference (BioCAS), Publisher: IEEE, Pages: 97-100, ISSN: 2163-4025
  • CONFERENCE PAPER
    Leene LB, Luan S, Constandinou TG, 2013,

    A 890fJ/bit UWB transmitter for SOC integration in high bit-rate transcutaneous bio-implants

    , IEEE International Symposium on Circuits and Systems (ISCAS), Publisher: IEEE, Pages: 2271-2274, ISSN: 0271-4302
  • JOURNAL ARTICLE
    Paraskevopoulou SE, Barsakcioglu DY, Saberi MR, Eftekhar A, Constandinou TGet al., 2013,

    Feature extraction using first and second derivative extrema (FSDE) for real-time and hardware-efficient spike sorting

    , JOURNAL OF NEUROSCIENCE METHODS, Vol: 215, Pages: 29-37, ISSN: 0165-0270
  • JOURNAL ARTICLE
    Williams I, Constandinou TG, 2013,

    An Energy-Efficient, Dynamic Voltage Scaling Neural Stimulator for a Proprioceptive Prosthesis

    , IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, Vol: 7, Pages: 129-139, ISSN: 1932-4545
  • CONFERENCE PAPER
    Williams I, Constandinou TG, 2013,

    Modelling muscle spindle dynamics for a proprioceptive prosthesis

    , Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS), Publisher: IEEE

    Muscle spindles are found throughout our skeletalmuscle tissue and continuously provide us with a sense of our limbs position and motion (proprioception). This paper advances a model for generating artificial muscle spindle signalsfor a prosthetic limb, with the aim of one day providing amputees with a sense of feeling in their artificial limb. By utilising the Opensim biomechanical modelling package the relationship between a joints angle and the length of surrounding muscles is estimated for a prosthetic limb. This is then applied to the established Mileusnic model to determine the associated muscle spindle firing pattern. This complete system model is then reduced to allow for a computationallyefficient hardware implementation. This reduction is achieved with minimal impact on accuracy by selecting key monoarticular muscles and fitting equations to relate joint angle to muscle length. Parameter values fitting the Mileusnic modelto human spindles are then proposed and validated against previously published human neural recordings. Finally, a model for fusimotor signals is also proposed based on data previously recorded from reduced animal experiments.

  • JOURNAL ARTICLE
    Woods SP, Constandinou TG, 2013,

    Wireless Capsule Endoscope for Targeted Drug Delivery: Mechanics and Design Considerations

    , IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, Vol: 60, Pages: 945-953, ISSN: 0018-9294
  • JOURNAL ARTICLE
    Constandinou TG, Hafliger P, 2012,

    Guest Editorial-Special Issue on Selected Papers From BioCAS 2011

    , IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, Vol: 6, Pages: 401-402, ISSN: 1932-4545
  • CONFERENCE PAPER
    Guilvard A, Eftekhar A, Luan S, Toumazou C, Constandinou TGet al., 2012,

    A Fully-Programmable Neural Interface for Multi-Polar, Multi-Channel Stimulation Strategies

    , IEEE International Symposium on Circuits and Systems, Publisher: IEEE, Pages: 2235-2238, ISSN: 0271-4302
  • CONFERENCE PAPER
    Haaheim B, Constandinou TG, 2012,

    A Sub-1μW, 16kHz Current-Mode SAR-ADC for Neural Spike Recording

    , International Symposium on Circuits and Systems (ISCAS), Publisher: IEEE, ISSN: 0271-4302

    This paper presents an ultra-low-power 8-bit asynchronous current-mode (CM) successive approximation (SAR) analogue-to-digital converter (ADC) for single-neuron spike recording. The novel design exploits CM techniques to support operation at supply voltages down to 1.2V, consuming under500nA at 16kSamples/s. The design features easy scalability, and allows for a tuneable sampling frequency and dynamic range (DR). The circuit is designed in a commercially-available 0.18u mCMOS technology and occupies a chip area of 0.078 sq.mm. The system requires a single, post-fabrication current calibration supportedby on-chip circuitry to ensure robust operation through process and mismatch variations.

  • CONFERENCE PAPER
    Luan S, Constandinou TG, 2012,

    A Novel Charge-Metering Method for Voltage Mode Neural Stimulation

    , IEEE International Symposium on Circuits and Systems, Publisher: IEEE, Pages: 2239-2242, ISSN: 0271-4302
  • CONFERENCE PAPER
    Mirza KB, Luan S, Eftekhar A, Constandinou TGet al., 2012,

    Towards a Fully-Integrated Solution for Capacitor-based Neural Stimulation

    , IEEE International Symposium on Circuits and Systems, Publisher: IEEE, Pages: 2243-2246, ISSN: 0271-4302
  • CONFERENCE PAPER
    Paraskevopoulou SE, Constandinou TG, 2012,

    An Ultra-Low-Power Front-end Neural Interface with Automatic Gain for Uncalibrated Monitoring

    , IEEE International Symposium on Circuits and Systems, Publisher: IEEE, Pages: 193-196, ISSN: 0271-4302
  • CONFERENCE PAPER
    Williams I, Constandinou TG, 2012,

    An Energy-Efficient, Dynamic Voltage Scaling Neural Stimulator for a Proprioceptive Prosthesis

    , IEEE International Symposium on Circuits and Systems, Publisher: IEEE, Pages: 1091-1094, ISSN: 0271-4302
  • CONFERENCE PAPER
    Abshire P, Bermak A, Berner R, Cauwenberghs G, Chen S, Christen JB, Constandinou TG, Culurciello E, Dandin M, Datta T, Delbrück T, Dudek P, Eftekhar A, Etienne-Cummings R, Indiveri G, Law MK, Linares-Barranco B, Tapson J, Tang W, Zhai Yet al., 2011,

    Confession session: Learning from others mistakes.

    , Publisher: IEEE, Pages: 1149-1162
  • JOURNAL ARTICLE
    Georgiou J, Andreou AG, 2011,

    Guest Editorial—Special Issue on Selected Papers From BioCAS 2010

    , IEEE Transactions on Biomedical Circuits and Systems, Vol: 5, Pages: 401-402, ISSN: 1932-4545
  • PATENT
    Georgiou P, Prodromakis T, Constandinou TG, Toumazou Cet al., 2011,

    Sensor Array for Measuring Neural Activity

    A sensor system comprising a substrate and integrated onto the substrate an array (7) of sensor elements (1), each sensor element comprising one or more inductors (3), one or more electrochemical sensors (4), and one or more optical sensors (2). The system further comprising a controller configured in use to separately address each of the sensor elements (1) to drive the respective inductors and receive outputs of the respective sensors.

  • JOURNAL ARTICLE
    Goh CZD, Georgiou P, Constandinou TG, Prodromakis T, Toumazou Cet al., 2011,

    A CMOS-Based ISFET Chemical Imager With Auto-Calibration Capability

    , IEEE SENSORS JOURNAL, Vol: 11, Pages: 3253-3260, ISSN: 1530-437X
  • CONFERENCE PAPER
    Goh ZDC, Georgiou P, Constandinou TG, Prodromakis T, Toumazou Cet al., 2011,

    A CMOS-based lab-on-chip array for combined magnetic manipulation and opto-chemical sensing

    , Pages: 1998-2001, ISSN: 0271-4310

    This paper presents a CMOS-based lab-on-chip platform for combined magnetic manipulation and opto-chemical sensing. Within each pixel, a Programmable Gate (PG) ISFET chemical sensor is combined with an active pixel sensor, and is encompassed within an inductive coil. The integrated pixel is tesselated to form an 8×8 array. Fabricated in a commercially available 0.35μm CMOS technology, the system can be used for simultaneous optical imaging and pH sensing, and includes autocalibration mechanisms for eliminating sensor non-idealities. A spatiotemporal magnetic field pattern generator has also been embedded for micro-scale magnetic manipulation. Controlled via a MATLAB based graphical user interface, the system achieves real time data acquisition at 6fps, a pH sensitivity of 57mV/pH and demonstrates magnetic manipulation of micro-beads. © 2011 IEEE.

  • CONFERENCE PAPER
    Hu Y, Liu Y, Constandinou TG, Toumazou Cet al., 2011,

    A 5s-Time-Constant Temperature-Stable Integrator for a Tuneable PID Controller in LOC Applications

    , IEEE International Symposium on Circuits and Systems (ISCAS), Publisher: IEEE, Pages: 1387-1390, ISSN: 0271-4302
  • JOURNAL ARTICLE
    Liu Y, Georgiou P, Prodromakis T, Constandinou TG, Toumazou Cet al., 2011,

    An Extended CMOS ISFET Model Incorporating the Physical Design Geometry and the Effects on Performance and Offset Variation

    , IEEE TRANSACTIONS ON ELECTRON DEVICES, Vol: 58, Pages: 4414-4422, ISSN: 0018-9383

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://wlsprd.imperial.ac.uk:80/respub/WEB-INF/jsp/search-t4-html.jsp Request URI: /respub/WEB-INF/jsp/search-t4-html.jsp Query String: id=690&limit=20&page=4&respub-action=search.html Current Millis: 1508473949808 Current Time: Fri Oct 20 05:32:29 BST 2017