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IEE Proceedings - Circuits, Devices and Systems

Issue 4 • Date Aug 1994

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Displaying Results 1 - 12 of 12
  • Pole placement algorithm for equiripple bandstop filter design

    Publication Year: 1994, Page(s):325 - 327
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (180 KB)

    In the paper, a pole placement algorithm for equiripple bandstop filter design is presented. By using the transformed variable the formulae for calculation of the stopband attenuation are given. The proposed algorithm is compatible with existing lowpass and bandpass pole placement algorithms View full abstract»

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  • New high accuracy pulse width modulation based digital-to-analogue convertor/power amplifier

    Publication Year: 1994, Page(s):315 - 324
    Cited by:  Papers (25)  |  Patents (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (652 KB)

    A new high accuracy pulse width modulation based digital-to-analogue convertor is presented. It is suitable for high power applications as well as ordinary low power use. While possessing important advantages, previously proposed convertors of this type have been difficult to realise in hardware and/or have exhibited high distortion. In this paper, digital signal processing (DSP) techniques are us... View full abstract»

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  • MOS analogue circuit simulation with SPICE

    Publication Year: 1994, Page(s):265 - 274
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (620 KB)

    The paper describes implementation details and imperfections of the SPICE MOSFET models which, together with MOS circuit design techniques, can contribute to inaccurate simulation results and convergence failure. The impact of model parameters on MOS level 2 and 3 drain-source conductance and gate-drain transconductance is analysed, and discontinuities are revealed. A typical CMOS differential amp... View full abstract»

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  • Large signal periodic time-domain circuit simulation

    Publication Year: 1994, Page(s):285 - 291
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (496 KB)

    A novel time-domain algorithm has been applied in the field of circuit analysis to model large signal effects under periodic excitation. Conventionally, the need to integrate out initial transients over many cycles had effectively made time-domain simulation impractical. The new algorithm, however, neatly avoids this problem, yielding the periodic steady state directly by simulating over just one ... View full abstract»

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  • Decomposition of logic networks with emphasis on signed digit arithmetic systems

    Publication Year: 1994, Page(s):307 - 314
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (448 KB)

    This paper describes an attempt to combine advantages of the signed digit number representation, applied at the word-level, and the residue number system applied at the digit-level, to achieve arithmetic decomposition of high-radix systems. Also introduced is a new decomposition algorithm for multiple-output Boolean functions based on partition products. Analysis of the proposed new method of arit... View full abstract»

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  • Overview of SPICE-like circuit simulation algorithms

    Publication Year: 1994, Page(s):242 - 250
    Cited by:  Papers (17)  |  Patents (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (644 KB)

    A tutorially orientated account of the principles underlying circuit level simulation forms the basis for discussing reliability of circuit level simulation. An outline of equation formulation and time discretisation of the equations is followed by consideration of stability of the numerical integration methods. The precision of simulation, which also depends on the integration methods used, is th... View full abstract»

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  • Effects of the sampling pulse width on the frequency characteristics of a sample-and-hold circuit

    Publication Year: 1994, Page(s):328 - 336
    Cited by:  Papers (1)  |  Patents (102)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (448 KB)

    Frequency characteristics, especially at high frequency, are important in applications such as sample-and-hold circuits for LCD driver ICs where the required signal bandwidth is much wider than the Nyquist rate. The frequency characteristics of a sample-and-hold circuit using analogue switches have hitherto been estimated from the frequency characteristics of a simple RC circuit comprising a stora... View full abstract»

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  • Extended harmonic balance method

    Publication Year: 1994, Page(s):275 - 284
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (624 KB)

    A new approach for frequency domain analysis and periodic steady state analysis of nonlinear circuits is described. Beside the variables generally used in the harmonic balance method (HBM) this method also uses a reduced waveform as a function of time. As a result, the number of harmonics in the HBM is limited to the harmonics requested for output results. The waveform in time is used to ensure th... View full abstract»

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  • Recombination and Joule heating effects in GTO thyristors with spatially varying lifetimes

    Publication Year: 1994, Page(s):292 - 298
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (416 KB)

    In the paper the forward conduction characteristics of the GTO thyristor are studied. A two-dimensional simulation is performed which solves the semiconductor device equations self consistently with the equation for lattice heat conduction. The significance of the different recombination mechanisms and spatially varying lifetime is considered, along with the relative effects of different mobility ... View full abstract»

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  • Efficient partitioning-based method to determine the upper bound on the number of operating points in transistor circuits

    Publication Year: 1994, Page(s):258 - 264
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (396 KB)

    An efficient method to assess the upper bound on the number of DC solutions is presented. It decomposes the original circuit into successive subcircuits by implementing a partitioning procedure, which is based on a topological analysis of the circuit. In a further step the uniqueness of the DC operating point is determined, and how many operating points can occur. Because the obtained subcircuits ... View full abstract»

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  • Base current reversal in bipolar transistors and circuits: a review and update

    Publication Year: 1994, Page(s):299 - 306
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (496 KB)

    A detailed study of base current reversal in silicon bipolar transistors and GaAs heterojunction bipolar transistors has been made. The physics of impact ionisation is presented followed by modelling of avalanche multiplication in devices. The effects of base current reversal on analogue and digital circuit operation are discussed View full abstract»

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  • Implementing high-order continuity and rate dependence in SPICE models

    Publication Year: 1994, Page(s):251 - 257
    Cited by:  Papers (13)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (456 KB)

    Two proposed techniques simplify and improve the implementation of SPICE device models. The first technique uses nested transformation of node potentials. It avoids the discontinuity in high-order derivatives that is typical of implementations that use conditional functions. This provides the smooth mathematical form distortion and intermodulation improves simulator convergence. The second techniq... View full abstract»

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