Analogue Signal

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Anestis Dounavis - One of the best experts on this subject based on the ideXlab platform.

  • Analogue portable electrooculogram real time Signal processor
    International Journal of Circuit Theory and Applications, 2014
    Co-Authors: Kyle Fricke, Robert Sobot, Anestis Dounavis
    Abstract:

    We present an Analogue Signal-processing circuit suitable for applications in a portable, wearable, non-invasive electrooculogram-based human–computer interface. Behavioural model and preliminary experimental results confirm that the proposed circuit, while operating in real time, correctly detects and decodes Signals generated by the subject's eye movements. The total power consumption is measured at 145 mW (excluding the RF link) with a 3 V power supply voltage, and the unit size is approximately 5 cm × 3 cm printed circuit board. Copyright © 2012 John Wiley & Sons, Ltd.

  • Analogue portable electrooculogram real‐time Signal processor
    International Journal of Circuit Theory and Applications, 2012
    Co-Authors: Kyle Fricke, Robert Sobot, Anestis Dounavis
    Abstract:

    We present an Analogue Signal-processing circuit suitable for applications in a portable, wearable, non-invasive electrooculogram-based human–computer interface. Behavioural model and preliminary experimental results confirm that the proposed circuit, while operating in real time, correctly detects and decodes Signals generated by the subject's eye movements. The total power consumption is measured at 145 mW (excluding the RF link) with a 3 V power supply voltage, and the unit size is approximately 5 cm × 3 cm printed circuit board. Copyright © 2012 John Wiley & Sons, Ltd.

A. Hamilton - One of the best experts on this subject based on the ideXlab platform.

  • A current mode Palmo cell for programmable Analogue Signal processing
    2005 IEEE International Symposium on Circuits and Systems, 2005
    Co-Authors: Yaxiong Zhang, A. Hamilton
    Abstract:

    In this paper a new Palmo cell is presented for the first time. Previous Palmo cells have made use of linear voltage mode circuits and log and square root domain current mode circuits. Here a current mode integrator is used to implement the Palmo cell. The advantage of the design presented here is in the ease of implementation compared to other current mode implementations. It also enables the Palmo cell to be operated in continuous time or sampled-data modes for various Signal processing tasks. Circuits operate with a 3.3V power supply with sampling rates of up to 10MHz for sampled-data circuits.

  • Novel Palmo Analogue Signal processing IC design techniques
    IEE Third one-day Colloquium on Analog Signal Processing (Digest No: 1996 236), 1996
    Co-Authors: K. Papathanasiou, A. Hamilton
    Abstract:

    Introduces and analyses a novel technique for implementing programmable Analogue hardware. Novel programmable Palmo circuits have been introduced which have low switching noise, low THD, and may be configured to perform many Signal processing functions. An initial test chip has demonstrated the viability of the approach and aided in understanding the practical application of the technique. This has led to new ideas for the implementation of the Palmo building blocks to reduce THD and improve overall programmability and performance. Such circuits are ideal for field programmable Analogue array (FPAA) cells. The new Palmo circuit blocks have a dedicated 6-bit current DAC and 3-bit programmable capacitor array giving 9 bits of programmability per cell. Cell interconnect to local neighbours or to pads further enhances programmability and high frequency performance. Dedicated static RAM is used to store the cell parameters and interconnect-which may also be dynamically reconfigured. A new improved comparator is under development to reduce harmonic distortion at high frequencies. These circuits are currently being designed and a new chip is to be fabricated in the near future.

Kyle Fricke - One of the best experts on this subject based on the ideXlab platform.

  • Analogue portable electrooculogram real time Signal processor
    International Journal of Circuit Theory and Applications, 2014
    Co-Authors: Kyle Fricke, Robert Sobot, Anestis Dounavis
    Abstract:

    We present an Analogue Signal-processing circuit suitable for applications in a portable, wearable, non-invasive electrooculogram-based human–computer interface. Behavioural model and preliminary experimental results confirm that the proposed circuit, while operating in real time, correctly detects and decodes Signals generated by the subject's eye movements. The total power consumption is measured at 145 mW (excluding the RF link) with a 3 V power supply voltage, and the unit size is approximately 5 cm × 3 cm printed circuit board. Copyright © 2012 John Wiley & Sons, Ltd.

  • Analogue portable electrooculogram real‐time Signal processor
    International Journal of Circuit Theory and Applications, 2012
    Co-Authors: Kyle Fricke, Robert Sobot, Anestis Dounavis
    Abstract:

    We present an Analogue Signal-processing circuit suitable for applications in a portable, wearable, non-invasive electrooculogram-based human–computer interface. Behavioural model and preliminary experimental results confirm that the proposed circuit, while operating in real time, correctly detects and decodes Signals generated by the subject's eye movements. The total power consumption is measured at 145 mW (excluding the RF link) with a 3 V power supply voltage, and the unit size is approximately 5 cm × 3 cm printed circuit board. Copyright © 2012 John Wiley & Sons, Ltd.

C. Toumazou - One of the best experts on this subject based on the ideXlab platform.

  • GaAs switched-current techniques for front-end Analogue Signal processing applications
    [1992] Proceedings of the 35th Midwest Symposium on Circuits and Systems, 1992
    Co-Authors: C. Toumazou, N.c. Battersby, M. Punwani
    Abstract:

    Ideas for the realization of switched current analog sampled data techniques in gallium arsenide (GaAs) MESFET technology are presented. Simulation results of a 1-GHz clock rate damped integrator and a biquadratic bandpass filter are given. Specific first generation memory cells discussed include the basic CMOS cell, the simple inverting GaAs MESFET cell, and the linear noninverting cell.

  • Advances in switched-current techniques for Analogue Signal processing
    IEE Colloquium on Advances in Analogue VLSI, 1991
    Co-Authors: N.c. Battersby, C. Toumazou, J.b. Hughes
    Abstract:

    The main advantage of the switched-current technique, when compared to switched-capacitors, is its compatibility with digital VLSI technology. This makes the technique particularly well suited to mixed-mode applications, such as sigma-delta and algorithmic converters. The switched-current memory cell (also known as the current copier) was initially conceived to overcome the inherent matching limitations of continuous time current mirrors. Initially, the cell found application in high performance D/A converters and more recently as a delay element for the realisation of Analogue filters. The practical utility of switched-current techniques for filter design has been demonstrated by fabricated filters. In this paper the authors review existing class A and class AB switched-current techniques, show fabricated results for the class A cell and explore several potential areas of application in the face of digital VLSI technology.

  • Current-mode Analogue Signal processing
    Proceedings of the 1991 Bipolar Circuits and Technology Meeting, 1991
    Co-Authors: J. Lidgey, C. Toumazou
    Abstract:

    The authors describe their work on current-mode analog Signal processing. Extending the conventional voltage-mode op-amp to provide current-mode performance has resulted in many useful application circuits being developed, ranging from universal follower amplifiers and current-conveyor-based impedance converters and filters, through to precision rectification and instrumentation amplifiers. Particular attention is given to work centered on developments of novel bipolar IC structures, including an operational floating current-conveyor, and developments toward a fully differential current-mode op-amp.

  • Current-mode active compensation techniques
    Electronics Letters, 1990
    Co-Authors: C.a. Makris, C. Toumazou
    Abstract:

    A general class of active compensation techniques based on current-mode Analogue Signal processing is described. These techniques are applicable to typical amplifier structures embedded in capacitive networks, such as operational amplifiers and integrators. A measure of the magnitude of the amplifier's capacitive embedment is shown to be directly related to an effective capacitance. This is significantly reduced by applying the proposed current-mode active compensation techniques, resulting in considerable improvement in amplifier speed, accuracy and bandwidth.

  • Operational amplifier modelling for high speed sampled data applications
    IEE Proceedings G - Circuits Devices and Systems, 1990
    Co-Authors: C.a. Makris, C. Toumazou
    Abstract:

    A pair of symmetrical and versatile equivalent circuits suitable for two pole single and two stage operational amplifiers is presented. The improved accuracy of the new equivalent circuits is necessary when designing the compensation network of high speed amplifiers to minimise their very strongly phase-dependent settling time, which is important for sampled data Analogue Signal processing circuits. These models also identify a critical effective capacitance, which is shown to govern the settling behaviour of the operational amplifier.

Robert Sobot - One of the best experts on this subject based on the ideXlab platform.

  • Analogue portable electrooculogram real time Signal processor
    International Journal of Circuit Theory and Applications, 2014
    Co-Authors: Kyle Fricke, Robert Sobot, Anestis Dounavis
    Abstract:

    We present an Analogue Signal-processing circuit suitable for applications in a portable, wearable, non-invasive electrooculogram-based human–computer interface. Behavioural model and preliminary experimental results confirm that the proposed circuit, while operating in real time, correctly detects and decodes Signals generated by the subject's eye movements. The total power consumption is measured at 145 mW (excluding the RF link) with a 3 V power supply voltage, and the unit size is approximately 5 cm × 3 cm printed circuit board. Copyright © 2012 John Wiley & Sons, Ltd.

  • Analogue portable electrooculogram real‐time Signal processor
    International Journal of Circuit Theory and Applications, 2012
    Co-Authors: Kyle Fricke, Robert Sobot, Anestis Dounavis
    Abstract:

    We present an Analogue Signal-processing circuit suitable for applications in a portable, wearable, non-invasive electrooculogram-based human–computer interface. Behavioural model and preliminary experimental results confirm that the proposed circuit, while operating in real time, correctly detects and decodes Signals generated by the subject's eye movements. The total power consumption is measured at 145 mW (excluding the RF link) with a 3 V power supply voltage, and the unit size is approximately 5 cm × 3 cm printed circuit board. Copyright © 2012 John Wiley & Sons, Ltd.