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Circuits and Systems, 1992. ISCAS '92. Proceedings., 1992 IEEE International Symposium on

Date 10-13 May 1992

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Displaying Results 1 - 25 of 103
  • Extremely simple hyperchaos generators including one diode

    Publication Year: 1992, Page(s):2797 - 2800 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    Hyperchaos is usually defined as a chaotic attractor with more than one positive Lyapunov exponent. Two extremely simple hyperchaos generators including one diode are analyzed. For the case where the diodes are regarded as ideal switches, the two-dimensional Poincare map can be derived rigorously and its Lyapunov exponents can be calculated by using piecewise exact solutions. It is confirmed that ... View full abstract»

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  • Wave-domino logic: timing analysis and applications

    Publication Year: 1992, Page(s):2949 - 2952 vol.6
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Wave-pipelining has been investigated extensively as a design method to increase clock frequencies of digital systems. The authors explore wave-pipelining of domino CMOS circuits because of their compact layouts and shorter delay time. A timing model and constraints are given for deriving the minimal period. Partitioning and restructuring of circuits for wave-pipelining are discussed. A test chip ... View full abstract»

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  • BiCMOS circuits for analog signal processing applications

    Publication Year: 1992, Page(s):2687 - 2690 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The authors focus on BiCMOS circuits that provide improved performance for current-mode analog signal processing systems. Two BiCMOS current-mode circuits are described. A continuous-time integrator for filtering applications is presented and a high-gain current-mode operational amplifier for wideband signal conditioning is introduced. Each of these basic building blocks has many potential applica... View full abstract»

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  • Ties between classical energy based Lyapunov functions in nonlinear circuits and power systems

    Publication Year: 1992, Page(s):3009 - 3012 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Lyapunov and energy-based stability analysis for estimating regions of attraction for stable equilibria in power system models has a very long history. The author provides tutorial background on the development of such energy analysis with the goal of establishing connections between the types of energy functions employed in power systems and classical energy based Lyapunov functions in circuits. ... View full abstract»

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  • Simple algorithms for tracing solution curves

    Publication Year: 1992, Page(s):2801 - 2804 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    The author presents some simple and practical algorithms for tracing implicitly defined solution curves. These algorithms use hyperspheres instead of hyperplanes that are used in the typical predictor-corrector algorithms. Effective techniques for preventing the reversion phenomenon of the curve tracing are also proposed. The proposed algorithms are geometrically clear and can be easily programmed... View full abstract»

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  • An on-line reconfiguration algorithm of WSI processor arrays

    Publication Year: 1992, Page(s):2953 - 2956 vol.6
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The authors propose an on-line reconfiguration algorithm for WSI processor arrays. An on-line reconfiguration algorithm requires the ability to reconfigure itself automatically without an external control. The proposed reconfiguration is guided by the assignment rules. The assignment rules are established based on the available interconnection resources. The algorithm achieves high reliability as ... View full abstract»

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  • A novel neural network for object recognition with blurred shapes

    Publication Year: 1992, Page(s):2901 - 2904 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Presents a neural network approach to shape recognition. The emphasis is on the development of an effective representation method to increase the degree of robustness in recognition of shapes which may be blurred by noise. A space-perturbation neural network is described which is characterized by two important properties. (1) The network can be trained using error back-propagation with only noise-... View full abstract»

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  • Blind adaptive filtering of unknown speech from unknown noise in a single receiver situation

    Publication Year: 1992, Page(s):2617 - 2620 vol.6
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    Describes a blind adaptive filtering approach to filtering speech from noise when no access is available to speech or to noise alone and no parameter or spectral information is available on either. The approach is concerned with a single source. The solution to this problem involves a priori assumptions on features such as relative degree or stationarity or model order rather than on a parameter o... View full abstract»

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  • BiCMOS components for video-rate continuous-time filters

    Publication Year: 1992, Page(s):2691 - 2694 vol.6
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The authors present circuit techniques that capitalize on the strengths of contemporary analog BiCMOS technologies and that show promise for the realization of high-performance video-rate continuous-time filters. BiCMOS technology offers many advantages for the design of demanding high-frequency IC filters. Integrator, transconductor, and Miller-stage designs are illustrated that exploit these adv... View full abstract»

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  • Nonlinear static and dynamical aspects of power systems: a bifurcation approach

    Publication Year: 1992, Page(s):3013 - 3016 vol.6
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    The author presents basic concepts in bifurcation theory which can be applied to study the voltage stability and nonlinear oscillations of power system networks. Dynamical systems are considered with one parameter. Changing the parameter may drive the system from one asymptotic behavior to another and result in different bifurcations. Typical static bifurcations are (i) saddle-node or fold bifurca... View full abstract»

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  • Design of piecewise-linear Markov maps generating white chaos: an inverse problem of dynamical systems

    Publication Year: 1992, Page(s):2805 - 2808 vol.6
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    Discusses the design of a discrete dynamical system generating chaos with a white spectrum. This chaos is referred to as white chaos. The results on the design of a piecewise-linear Markov map generating white chaos are summarized. For any number of subintervals of maps, maps always exist if the rank of the incident matrix is equal to 1. However, no piecewise linear Markov map whose incident matri... View full abstract»

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  • Self-timed simultaneous bidirectional signalling for IC systems

    Publication Year: 1992, Page(s):2957 - 2960 vol.6
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The authors present a self-timed architectural interface design for VLSI CMOS integrated circuit systems. The interface follows a two-cycle self-timed bundled data protocol and nearly doubles the input/output (I/O) bandwidth for wide bus VLSI interprocessor communication by simultaneously sending and receiving data over the same wires. A constant overhead of four control wires is incurred over the... View full abstract»

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  • An analog neural network for linear programming: analysis, design and simulation

    Publication Year: 1992, Page(s):2905 - 2908 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Presents an analog recurrent neural network for solving linear programs. The proposed analog neural network is asymptotically stable and able to generate optimal solutions to linear programming problems. The asymptotic properties of the proposed analog neural network for linear programming are analyzed theoretically. The circuit design for realizing the analog network is discussed. Two illustrativ... View full abstract»

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  • Performance characteristics of a third order adaptive Volterra filter

    Publication Year: 1992, Page(s):2785 - 2788 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Examines the stability and convergence properties of third order adaptive Volterra filters. The authors consider two forms: a full polynomial implementation, and a reduced complexity implementation, with a significantly lower computational requirement. In both cases, it is shown that for input signals with samples drawn from symmetric densities, the mean convergence proceeds independently for the ... View full abstract»

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  • BiCMOS techniques for high speed, high resolution A/D converters

    Publication Year: 1992, Page(s):2695 - 2698 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The author discusses the advantages of BiCMOS technology in the implementation of high-speed, high-resolution analog/digital converters. Consideration is given to how high-speed analog requirements affect device and topology selection. Several illustrative examples are provided to illustrate how BiCMOS can provide a performance advantage over the straight CMOS implementations and a flexibility/fun... View full abstract»

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  • Statistical circuit design using neural network and orthogonal array

    Publication Year: 1992, Page(s):3017 - 3020 vol.6
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The neural network and orthogonal array are introduced for statistical circuit design. As an alternative to quadratic approximation, a back-propagation neural network is utilized as a classifier and employed to nonlinearly approximate to the feasible region in the circuit element space to improve the accuracy of approximation. The orthogonal array, which has found wide applications in experimental... View full abstract»

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  • Chaotic behaviour of distributed nonlinear circuits

    Publication Year: 1992, Page(s):2809 - 2812 vol.6
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A detailed procedure for analyzing the chaotic behavior of a second-order negative resistance distributed oscillator is presented. Both cases of commensurate transmission lines and noncommensurate transmission lines are considered. The negative resistance characteristics as well as the relative length of the transmission lines play an important role in the qualitative behavior of the circuit. The ... View full abstract»

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  • Energy-function approach to high-level synthesis scheduling

    Publication Year: 1992, Page(s):2961 - 2964 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    A new scheduling algorithm based on an energy function is presented. Scheduling is performed iteratively under the direction of an energy function until all the operations are scheduled and the total energy gets into a minimum. In each iteration of scheduling, it is possible to either schedule an operation to a control step (assign) or exclude the possibility of scheduling an operation to a contro... View full abstract»

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  • Recent results in robust parametric stability and control

    Publication Year: 1992, Page(s):2707 - 2711 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The author describes some recent results obtained on the robust stability and control of systems containing parametric uncertainty. He begins with Kharitonov's theorem on interval systems and its generalization to control systems containing linearly correlated interval parametric uncertainty, obtained by H. Chapellat and S.P. Bhattacharyya in 1989. The relationship of this result, called the linea... View full abstract»

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  • Optimal weighted order statistic filters under structural constraints

    Publication Year: 1992, Page(s):2621 - 2624 vol.6
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The authors present a procedure based on quadratic programming for finding the optimal weighted order statistic filter under the mean absolute error criterion satisfying imposed structural constraints. In this way, filters are obtained that simultaneously meet the desired detail preservation constraints and give a good noise attenuation. The algorithm is characterized by low computational complexi... View full abstract»

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  • Network theoretic conditions for existence and uniqueness of steady state solutions to electric power circuits

    Publication Year: 1992, Page(s):2821 - 2828 vol.6
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    Surveys available network theoretic results on conditions under which the unique and operationally acceptable load flow solution exists. The main topic is the problem of establishing system-dependent bounds on input and network topology within which the unique solution exists. Both decoupled real-power-phase angle and reactive-power-voltage problems are studied. The particular emphasis is on the c... View full abstract»

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  • Non conventional signal processing by the use of sigma delta technique: a tutorial introduction

    Publication Year: 1992, Page(s):2645 - 2648 vol.6
    Cited by:  Papers (14)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    The one-bit high-speed data stream generated by sigma-delta modulators can be transformed into a high-resolution analog or digital signal since the spur affecting the one-bit stream is concentrated at high frequency. It is shown that the same feature also gives interesting advantages in efficient signal processing. The double nature, both analog and digital, of a sigma-delta bit stream allows mixe... View full abstract»

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  • A sigma-delta based PLL for non-sinusoidal waveforms

    Publication Year: 1992, Page(s):2661 - 2664 vol.6
    Cited by:  Papers (2)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The authors describe a phase-locked loop architecture for the locking of nonsinusoidal waveforms. It is based on the generation of the locking signal by means of a proper waveform synthesizer. The free-running frequency of the synthesizer is dynamically adjusted to ensure a suitable lock range. The system has been functionally analyzed and simulated, and its feasibility has been demonstrated. The ... View full abstract»

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  • RACHANA: an integrated placement and routing approach to CMOS analog cells

    Publication Year: 1992, Page(s):2981 - 2984 vol.6
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    The authors present a new integrated placement and routing algorithm, RACHANA, for CMOS analog cells. Like any analog layout expert, the approach takes into account the relative positions of various primitive analog modules, e.g., current mirror, differential pair, etc., in the circuit diagram. These modules are automatically recognized in the input circuit schematic and procedurally generated by ... View full abstract»

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  • Neural networks for optimization of nonquadratic cost functions with application to adaptive signal processing

    Publication Year: 1992, Page(s):2909 - 2912 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    A new neural adaptive filtering structure was proposed by the authors (1990-1991), based on a least-squares (LS) performance function of errors. This structure is generalized and a neural adaptive finite impulse response (FIR) filter is designed whose performance function is expressed in the general non-LS form. The proposed neural filter is shown to compute in real time the optimal set of the pro... View full abstract»

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