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IEE Proceedings - Circuits, Devices and Systems

Issue 5 • Date Oct 1994

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Displaying Results 1 - 15 of 15
  • Detection of weak Doppler signal in a strong carrier: an equivalent high-Q band-elimination filter

    Publication Year: 1994, Page(s):377 - 381
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (268 KB)

    In the paper, weak Doppler-shifted components of reflected ultrasonic signals were measured following the application of continuous-wave ultrasound for the measurement of blood flow velocity using the Doppler effect. The component of the emitted frequency was suppressed by subtracting an extracted signal from the reflected signal obtained by nonlinear closed loops. Phase information of the signal ... View full abstract»

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  • Distributed arithmetic perceptron

    Publication Year: 1994, Page(s):382 - 386
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB)

    The shift of the nonlinearity from the neuron to the input allows the realisation of any mapping by a single perceptron. The resulting perceptron is unimodal and consequently there are no problems of local minima and excessive time-consuming training procedures. In the paper a method is proposed for carrying out this preprocessing in a more general way. Moreover, it is shown that the weights of th... View full abstract»

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  • New stability results for 2-D discrete systems based on the Fornasini-Marchesini state space model

    Publication Year: 1994, Page(s):427 - 432
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    New conditions for the internal stability of a 2-D discrete system described by the Fornasini-Marchesini (FM) local state-space model are presented. Further, the stability margin of a 2-D discrete system described by a (FM) state-space model is considered and methods to compute it or to obtain lower bounds are developed. These methods are based on the various forms of the Lyapunov equation for 2-D... View full abstract»

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  • Experimental evaluation of capacitance tomographic flow imaging systems using physical models

    Publication Year: 1994, Page(s):357 - 368
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (816 KB)

    An experimental method for evaluating the performance of capacitance tomographic flow imaging systems is described. Criteria are defined to describe the performance of these systems, namely spatial and permittivity resolution, accuracy (system errors) and signal to noise ratio. Static physical models simulating typical flow distribution patterns are used as standard test objects and The criteria a... View full abstract»

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  • Fast VLSI architectures using nonredundant multibit recoding for computing AY mod N

    Publication Year: 1994, Page(s):345 - 349
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (260 KB)

    A recently proposed technique for multiplication using two-bit recoding, which does not require subtraction operations, is extended for fast AB mod N evaluation. Architectures considering 2, 4, 8 and 16 bit recoding are considered and compared regarding the ALU complexity and speed requirements View full abstract»

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  • Parametric yield optimisation of MOS VLSI circuits based on simulated annealing and its parallel implementation

    Publication Year: 1994, Page(s):387 - 398
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (796 KB)

    As device dimensions continuously scale down in current MOS VLSI technology, statistical tolerances of process parameters become more significant. Thus, for circuit designers, it is essential to estimate the influence of such variations on circuit performances and to optimise the circuit so that the maximum yield is obtained. This paper presents an approach for parametric yield optimisation of MOS... View full abstract»

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  • Bit-serial digital filter architecture using RAM-based delay operators

    Publication Year: 1994, Page(s):371 - 376
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (396 KB)

    Realisations of high-order bit-serial FIR digital filters can be dominated by the shift register stages required for the z-1 operators. This paper presents a new approach to the implementation of bit-serial delay operators based on the use of random access memory in combination with a data transformation process. Together these facilitate the storage and retrieval of serial data in a fo... View full abstract»

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  • New global routing subsystem for CMOS gate arrays

    Publication Year: 1994, Page(s):421 - 426
    Cited by:  Papers (20)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB)

    A new global routing subsystem, the `LSIS-II Layout System' for CMOS gate array, is presented. This subsystem consists of three new algorithms, the main purpose of which is to assign available resources evenly. The first two algorithms, called EOFCW and EOFCC, show how to arrange nets so that horizontal resources are used evenly; the third algorithm PACR helps the channel router to utilise vertica... View full abstract»

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  • Noise analysis of second-order analogue active filters

    Publication Year: 1994, Page(s):350 - 356
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (380 KB)

    The output noise of continuous-time active filters is analysed in general terms by directly inserting device noise sources in an equivalent block diagram. This removes some of the restrictions imposed by previous methods of noise-source referral and permits more meaningful analytical optimisation. Design recommendations for minimising noise in a wide range of realisations then emerge. This allows ... View full abstract»

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  • Uniqueness of solutions of networks with two terminal piecewise linear resistors

    Publication Year: 1994, Page(s):369 - 370
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (148 KB)

    For networks containing resistors, independent-sources, gyrators, ideal transformers, diodes and other saturating monotone piecewise linear resistors, a new condition is proposed to guarantee uniqueness of solutions. This is both necessary and sufficient and is easy to test. It requires that the characteristics should satisfy a condition with the null vectors of the matrix of the linear part of th... View full abstract»

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  • Modular SPICE macromodel for operational amplifiers

    Publication Year: 1994, Page(s):417 - 420
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (244 KB)

    A new operational-amplifier macromodel is presented based on a structured modular approach. The model performs well in comparative tests and parameter extraction from data sheets is far easier than previously published models View full abstract»

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  • Performance characterisation of a microwave transistor

    Publication Year: 1994, Page(s):337 - 344
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (420 KB)

    The maximum transducer power gain GTmax of a bilateral microwave transistor-is analytically expressed in terms of only noise figure F, input-VSWR Vi and the open-circuit parameters |z|. The analysis is based on a geometrical approach using the constant noise, input VSWR and gain circles in the source and input impedance planes keeping the solution within the physical bounds. ... View full abstract»

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  • Versatile voltage-controlled impedance configuration

    Publication Year: 1994, Page(s):414 - 416
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (156 KB)

    A new configuration is introduced which, apart from realising the linearised voltage-controlled R, L and C elements (like a previously known scheme), can also realise ideal voltage-controlled frequency-dependent negative resistance (Z(s)=1/Ds2) and ideal voltage-controlled frequency-dependent negative conductance (Z(s)=Ms2) elements from the same topology. The new structure, ... View full abstract»

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  • Constant integer multiplication using minimum adders

    Publication Year: 1994, Page(s):407 - 413
    Cited by:  Papers (96)  |  Patents (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (532 KB)

    A new method of formulating constant integer multiplication is presented. It requires fewer adders in general than a canonic signed-digit (CSD) representation. Graphs are used to illustrate multiplier implementation. A general suboptimal algorithm for the design of multipliers of any wordlength is presented. For 32-bit words, it achieves an average improvement of 26.6% over CSD. Rules for the gene... View full abstract»

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  • Optimisation efficiency in behavioural synthesis

    Publication Year: 1994, Page(s):399 - 406
    Cited by:  Papers (4)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (512 KB)

    Behavioural synthesis is the process whereby the mapping of system operation (behaviour) onto a physical circuit is essentially automated. In general, there are many ways in which a given design can be realised and each alternative design will have different physical parameters (area, speed and power dissipation being the most common). One of the key features of a good silicon compiler is that it ... View full abstract»

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