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Circuits, Devices and Systems, IEE Proceedings -

Issue 1 • Date Feb 1995

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Displaying Results 1 - 16 of 16
  • HyHOPE: fast fault simulator with efficient simulation of hypertrophic faults

    Publication Year: 1995 , Page(s): 53 - 60
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (680 KB)  

    In sequential circuit fault simulation, hypertrophic faults, which result from lengthened initialisation sequence in faulty circuits, usually produce a large number of fault events during simulation and require excessive gate evaluations. These faults degrade the performance of fault simulators attempting to simulate them exactly. In the paper, an exact simulation algorithm is developed to identif... View full abstract»

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  • Order reduction technique using the Chebyshev polynomial and its application in digital filter design

    Publication Year: 1995 , Page(s): 27 - 29
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (136 KB)  

    A method capable of reducing the order of nth order polynomials, with small resulting error, based on the utilisation of the Chebyshev polynomial, is presented. Useful sample applications of this order reduction technique in digital filter design are given View full abstract»

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  • Ferroresonant oscillations in capacitor voltage transformers

    Publication Year: 1995 , Page(s): 30 - 36
    Cited by:  Papers (8)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (376 KB)  

    Ferroresonant oscillations are unpredictable and their occurrence is of serious concern, predominantly because of possible damage to equipment such as transformers. It is known that by energising the transformer at different points on the voltage wave, ferroresonant oscillations of different types can be induced. A methodical approach for determining these initial conditions, given a system, is th... View full abstract»

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  • Compact Si1-xGex/Si heterojunction bipolar transistor model for device and circuit simulation

    Publication Year: 1995 , Page(s): 1 - 7
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (468 KB)  

    A physical but compact Si1-xGex/Si heterojunction bipolar transistor (HBT) model suited for device design and circuit simulation is presented. The model is based on the de Graaf-Kloosterman formalism for the modelling of the bipolar transistors, but adds important heterostructure device physics as well as physical properties of SiGe material. The model, implemented in the APL... View full abstract»

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  • High-throughput data compressor designs using content addressable memory

    Publication Year: 1995 , Page(s): 69 - 73
    Cited by:  Papers (14)  |  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (312 KB)  

    The paper presents a novel VLSI architecture for high-speed data compressor designs which implement the well known LZ77 algorithm. The architecture mainly consists of three units, namely, content addressable memory, match-logic unit, and output-stage unit. The content-address-memory unit generates a set of hits signals which identify those positions whose symbols in a specified window are the same... View full abstract»

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  • Multiphase sinusoidal oscillator using the CFOA pole

    Publication Year: 1995 , Page(s): 37 - 40
    Cited by:  Papers (15)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (204 KB)  

    A multiphase sinusoidal oscillator using the parasitic poles of current feedback operational amplifiers (CFOAs) is presented. The oscillator can generate n signals which are equal in amplitude and equally spaced in phase. The oscillator using the parasitic poles of CFOAs is suitable for high frequency applications and monolithic IC fabrication. The effects caused by the nonlinearity of the CFOA on... View full abstract»

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  • Unified theory of compatible impedances

    Publication Year: 1995 , Page(s): 15 - 20
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (312 KB)  

    The paper presents a new approach to the solution of the compatible impedance problem. It avoids the complicated coefficient constraints, and uses a set of algebraic equations to test the compatibility of two given impedances which may or may not be positive real. Furthermore, the coupling network may be reciprocal or nonreciprocal. Illustrative examples are also given View full abstract»

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  • Full-swing high speed CBiCMOS digital circuit for low-voltage applications

    Publication Year: 1995 , Page(s): 8 - 14
    Cited by:  Papers (5)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (320 KB)  

    A new complementary BiCMOS circuit to achieve full-swing and high speed for low-voltage applications is presented. The proposed circuit utilises the parasitic lateral bipolar transistor, generic to the CMOS process, to speed up the pull-down transient performance. It is based on the submicron technologies and specifically designed, simulated, and comparatively evaluated for low supply voltages. Th... View full abstract»

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  • Direct interpolation method for reducing the non-linearity and quantisation distortion of analogue-to-digital convertors

    Publication Year: 1995 , Page(s): 61 - 68
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (452 KB)  

    A direct interpolation method is described that reduces the distortion due to quantisation and linearity errors of practical analogue-to-digital convertors. In contrast with other interpolation systems, the analogue signal is not oversampled, and no feedback loops are required. Compared with the conventional use of `dither', direct interpolation provides an increase in signal-to-noise ratio as wel... View full abstract»

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  • Synthesis and RC-active simulation of an LR terminated LC filter

    Publication Year: 1995 , Page(s): 49 - 52
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (216 KB)  

    An LC simulation-type RC-active filter with all-pole lowpass characteristics is presented. The drawbacks of active RC filters using FDNRs or the equivalent inductor using GICs are overcome by introducing a new prototype LC filter. A synthesis procedure of the new prototype LC filter, is presented and is followed by realisation of the equivalent inductor using GICs. Finally, a fifth-order Chebyshev... View full abstract»

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  • Novel technology independent neural network approach on device modelling interface

    Publication Year: 1995 , Page(s): 74 - 82
    Cited by:  Papers (4)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (728 KB)  

    A novel, fast and accurate neural network tool is proposed for efficient technology independent realisation of the interface between device modelling and circuit simulation. Enhanced back-propagation neural network based algorithms are applied to the problem of modelling various device characteristics. These algorithms include the modified back-propagation algorithm, the conjugate gradient algorit... View full abstract»

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  • New approach for the ordering of gate permutation in one-dimensional logic arrays

    Publication Year: 1995 , Page(s): 90 - 96
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (472 KB)  

    The one-dimensional gate permutation problem is transferred into a new one of achieving an optimum gate permutation under the constraint of a predetermined adjustable maximum number of tracks. A fast and efficient constructive algorithm is proposed to solve it. The algorithm has the advantage of uniformly distributing the local congestion so that optimum permutation with the required track number ... View full abstract»

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  • Transformer matrix of some transmission lines topologies

    Publication Year: 1995 , Page(s): 21 - 26
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (260 KB)  

    A transmission line based transformer (TLBT) is described. It is shown that some topologies of transmission line elements imply transformer-like behaviour of the total arrangement. The expected application of the TLBT is in systems in which matching is required, for high frequency waveforms or for narrow pulse applications View full abstract»

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  • Realisation of analogue divider using current feedback amplifiers

    Publication Year: 1995 , Page(s): 45 - 48
    Cited by:  Papers (5)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (168 KB)  

    New analogue divider circuits using current feedback amplifiers (CFAs) are presented. Basically, they consist of two CFAs, two MOS transistors biased in the triode region, and a resistor. Furthermore, an integrable divider circuit is also presented. Experimental results are given to demonstrate the feasibility of the proposed circuits. The proposed divider is useful in high-frequency analogue sign... View full abstract»

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  • Macromodelling series-resonant convertor circuits

    Publication Year: 1995 , Page(s): 83 - 89
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (340 KB)  

    The paper describes the formulation and verification of a generic SPICE macromodel for series-resonant convertor circuits. The model is derived from the averaged time-invariant state-space equations that arise from a piecewise sinusoidal approximation and its frequency domain transformation. The single macromodel so derived allows the entire convertor to be included with its control circuitry and ... View full abstract»

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  • Two's-complement fast serial-parallel multiplier

    Publication Year: 1995 , Page(s): 41 - 44
    Cited by:  Papers (9)  |  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (252 KB)  

    A fast serial-parallel multiplier based on the Baugh-Wooley algorithm is proposed. It is shown that sign extension of the sum or carry bit, produced during the addition of the bit product rows, can be avoided, and a more efficient multiplier can be obtained. The multiplier is compared with one proposed recently in terms of speed and hardware, and is shown to be faster, to need less hardware and to... View full abstract»

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