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IEE Proceedings G - Circuits, Devices and Systems

Issue 6 • Date Dec. 1992

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Displaying Results 1 - 8 of 8
  • Novel A/D convertor with median filtering of programmable window length

    Publication Year: 1992, Page(s):621 - 625
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (448 KB)

    Median filtering with programmable window length is needed for environments with impulse noises of different lengths. The authors propose a new architecture for an A/D convertor with median filtering of programmable window length. Both digital and analogue medians are available at the output. Previous architecture was implemented using a positive Boolean function (PBF) circuit which requires a lar... View full abstract»

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  • Efficient convertors for residue and quadratic-residue number systems

    Publication Year: 1992, Page(s):626 - 634
    Cited by:  Papers (15)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (646 KB)

    The quadratic-residue number system (QRNS) is known to be efficient for complex-number calculations, since it eliminates the need for cross-product terms and offers high speed with small hardware complexity. However, the conversion overhead between conventional number systems and QRNS limits its efficiency. Most implementations of convertors between QRNS and other number systems are based on ROMs ... View full abstract»

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  • Technique for 1-dimensional VLSI layout generation

    Publication Year: 1992, Page(s):635 - 645
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1014 KB)

    The layout and synthesis system RESCUE presented by Shaw et al. (1986) is briefly reviewed. It is a system for implementing random logic using an array layout style. RTL equations are realised by a horizontal row of cells which may contain both static and dynamic circuits. Signals are carried by polysilicon lines in horizontal rows. Algorithmic improvements are suggested in three areas. First, the... View full abstract»

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  • Design and VLSI implementation of a pattern classifier using pseudo 2D cellular automata

    Publication Year: 1992, Page(s):661 - 668
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (771 KB)

    The design and VLSI implementation of a pattern classifier based on pseudo 2D cellular automata (CA) is presented in this paper. Cellular automata exhibiting cyclic group structures are used to provide improved measures of the degree of similarity between patterns. The classifier operation is an adaptive process which gathers information during a training phase and uses them during the processing ... View full abstract»

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  • Static- and dynamic-circuit models of PWM buck-derived DC-DC convertors

    Publication Year: 1992, Page(s):669 - 679
    Cited by:  Papers (34)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (755 KB)

    A systematic derivation of DC-circuit and small-signal-circuit models and characteristics for pulse-width-modulated buck-derived convertors operating in the continuous conduction mode is presented. Starting from voltage- and current-transfer functions of an idealised switching part of the convertor and using the linearisation technique, pure linear-circuit models of lossless convertors are derived... View full abstract»

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  • Semiconductor device physics and modelling. 1. Overview of fundamental theories and equations

    Publication Year: 1992, Page(s):646 - 654
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (704 KB)

    The mathematical physics related to semiconductor materials and devices is reviewed, and its relevance and application to the commonly used semiconductor device equations and models is discussed. An overview is given to provide a methodical link between the fundamental theories and equations. The fundamental theories start from the wave and particle properties of electrons and the statistics of fr... View full abstract»

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  • Noise in mixed continuous-time switched-capacitor sigma-delta modulators

    Publication Year: 1992, Page(s):680 - 684
    Cited by:  Papers (18)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (436 KB)

    It is commonly accepted that oversampling/noise-shaping is the most suitable technique for implementing high-resolution data converters in MOS technologies. Most existing modulators use switched-capacitor (SC) techniques because they provide a highly controllable design. When compared to continuous-time (CT) techniques, SC techniques have two main drawbacks: settling time limitation and thermal no... View full abstract»

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  • Semiconductor device physics and modelling. 2. Overview of models and their applications

    Publication Year: 1992, Page(s):655 - 660
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (436 KB)

    For pt.1 see ibid., vol.139, no.6, p.645-54 (1992). The classic semiconductor device models are reviewed and discussed. They include the generic models for more accurate device modeling such as the Linvill lumped-circuit model and the Sah transmission-line circuit model, and the conventional models aimed at predicating the first-order device behaviour, such as the drift-diffusion model. Specific a... View full abstract»

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