[Proceedings] 1992 IEEE International Symposium on Circuits and Systems

10-13 May 1992

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  • New results for the design of robust strict positive real systems

    Publication Year: 1992, Page(s):2729 - 2732 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (269 KB)

    The design of filters ensuring convergence of algorithms in the presence of uncertainty in the plant model is a key problem in the area of identification and adaptive control. The authors provide design criteria for filters which yield a family of uncertain discrete time polynomials that are strict positive real over an assigned region of the complex plane. The family of polynomials is defined in ... View full abstract»

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  • Interval trigonometric polynomials and wavenumber response of n-D FIR digital filters

    Publication Year: 1992
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (33 KB)

    Summary form only given. The scope for determining the lower and upper bounds for the wavenumber response of a multidimensional interval finite impulse response (FIR) filter from the corresponding bounds for each element of a subset of extreme filters is investigated.<> 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 (285 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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  • Applications of nonlinear filtering in radar CFAR detection

    Publication Year: 1992, Page(s):2641 - 2644 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The primary concern in radar constant false alarm rate (CFAR) design is the estimation of background noise distributions of known parametric form, but with unknown parameters. Most systems employ an adaptive detection threshold, using an estimate of the noise level to maintain a CFAR. Various nonlinear filtering algorithms, notably, order statistic (OS) filters, are used as the CFAR estimator. 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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  • Design of a 2.7 GHz linear OTA in bipolar transistor-array technology with lateral PNPS

    Publication Year: 1992, Page(s):2844 - 2847 vol.6
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The design of a tunable high-frequency fully integrated bipolar operational transconductance amplifier (OTA) is presented. Techniques resulting in tunability and broadbanding are discussed, as well as unavoidable trade-offs resulting from the lack of a vertical positive-negative-positive (PNP) device. Using an 8-GHz bipolar transistor array process, the OTA had a -3-dB frequency response of more t... View full abstract»

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  • A constructive matching algorithm for cell generator based technology mapping

    Publication Year: 1992, Page(s):2965 - 2968 vol.6
    Cited by:  Papers (3)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    The authors present a new approach to technology mapping targeting for CMOS complex cell generators. The approach improves on current mapping techniques by introducing a constraint-driven module whose parameters are defined by the capabilities of a cell compiler. This constructive matching technique allows mapping of networks for very large cell families. The module is placed in a context which en... View full abstract»

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  • An error-detectable array for all-substring comparison

    Publication Year: 1992, Page(s):2941 - 2944 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    All-substring comparison for pattern P and string S gives the minimum distance between P and all the consecutive substrings in S, which is more general than usual string comparison problems. Run-time error detection is a desirable property in practice. The author designs an error-detectable systolic array for the problem of all-substring comparison, and analyzes the performance of the design. He i... View full abstract»

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  • An analysis of inductive peaking in high-frequency amplifiers

    Publication Year: 1992, Page(s):2848 - 2851 vol.6
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Presents a theoretical treatment of inductive peaking. Although the analysis is general, it is specifically targeted for the design of monolithic broadband transimpedance amplifiers in photoreceivers. The authors derive closed-form, symbolic solutions for the small-signal transimpedance and analyze the effects of different types of inductive peaking on system performance. Based on these closed-for... View full abstract»

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  • Dynamic behaviors in two novel autonomous circuits with a physical negative resistor characterized by nonsymmetric function

    Publication Year: 1992, Page(s):2813 - 2816 vol.6
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    Presents two novel three-order autonomous circuits. The nonlinear element in the circuits may be any physical negative resistor, either piecewise-linear or irregular. Using a type-S negative resistance element, the authors observed the double scroll attractors similar to that in Chua's circuit. Using an avalanche transistor, they observed more complicated dynamic behaviors than in other autonomous... 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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  • Monolithic CMOS compandors based on Σ-Δ oversampling

    Publication Year: 1992, Page(s):2649 - 2652 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The CMOS compandor circuit presented is based on sigma-delta (Σ-Δ) oversampling. The Σ-Δ modulator converts an analog signal into a binary sequence, so that it can multiply another signal by on-and-off switching. Continuous-time CMOS multipliers, which are difficult to implement with high linearity, are not required in such a compandor configuration. Simulation results of a... View full abstract»

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  • Folding an array of transistors and contacts

    Publication Year: 1992, Page(s):2969 - 2972 vol.6
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    The authors present a unified graph model for representing various layout and routing problems in VLSI design, such as programmable logic array (PLA) folding, gate matrix layout, and channel routing. They introduce an algorithm for folding a Weinberger array. This is a generalization of PLA folding, and is equivalent to channel routing. As a part of this algorithm, a graph labeling procedure is de... View full abstract»

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  • Parallel encoder, decoder, detector, corrector for cyclic redundancy checking

    Publication Year: 1992, Page(s):2945 - 2948 vol.6
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    Redesigning the linear feedback shift register so that syndrome calculations can be performed in one sweep allows for fast error control in high-speed computer networks. The resulting structure forms the basis of the PEDDC (parallel encoder, decoder, detector, corrector) which replaces the conventional SEDDC (serial encoder, decoder, detector, corrector) for generation and utilization of cyclic co... View full abstract»

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  • Electrical power network decomposition for parallel computations

    Publication Year: 1992, Page(s):2761 - 2764 vol.6
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Introduces an electrical power network decomposition methodology for the network equation solution by block-iterative methods implemented on parallel computers. The proposed methodology is based on the building up of a fixed number of subnetworks by aggregating network nodes to a given number of so-called seed nodes. The aggregation method is controlled by a node ranking criterion based on the wei... View full abstract»

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  • A high gain current-mode operational amplifier

    Publication Year: 1992, Page(s):2852 - 2855 vol.6
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Inaccurate open-loop current gain is a limitation of current-mode circuits. The authors proposed a current-mode operational amplifier (I-opamp) with high open-loop gain that provides accurate closed-loop current-gain characteristics. Negative feedback around the high-gain I-opamp produces an accurate closed-loop current gain insensitive to process, supply, and temperature variations. An analysis o... View full abstract»

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  • A new approach to global optimization using ideas from nonlinear stability theory

    Publication Year: 1992, Page(s):2817 - 2820 vol.6
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Describes a method for determining the global optimum of a function on a compact manifold. The method determines and connects all the local minima and local maxima of a function on a compact manifold. The method is based on properties of stability regions associated with the equilibria of the gradient vector field. Applications of the method include global optimization and nonlinear equation solvi... 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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  • A new approach to the associative memory design using neural networks

    Publication Year: 1992, Page(s):2925 - 2928 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    Proposes a design for associative memory using a neural network. The problem of associative memory is transformed to a constrained optimization problem. The information storage and retrieval algorithms and the network architecture for the proposed associative memory are described. Simulations were carried out to test the proposed storage/retrieval algorithms. The results of these simulations are p... View full abstract»

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  • A computation of power system characteristic by general homotopy and investigation of its stability

    Publication Year: 1992, Page(s):2745 - 2748 vol.6
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    Presents an application of a general homotopy method to the computation of the characteristics of a power system such as PV curves. The load flow equations are derived from a set of nonlinear differential and algebraic equations. A homotopy continuation method is used for following the characteristics of the power system. The stability of the load flow solutions is discussed by deriving the variat... View full abstract»

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  • The self-validating numerics-a new tool for computer assisted proofs of nonlinear problems

    Publication Year: 1992, Page(s):2773 - 2776 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    The self-validating numerical method is surveyed for application to nonlinear problems. By taking into account the effect of rounding error, this method provides a method of computer assisted proofs. The approach to this problem of L. V. Kantrovich and G. P. Akilov (1964) is surveyed. His method is based on his convergence theorem of Newton's method and can be seen as an a posteriori error estimat... View full abstract»

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  • Micro-statistic LMS filtering

    Publication Year: 1992, Page(s):2613 - 2616 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The theory for the class of microstatistic least-mean-square (LMS) filters which requires the adaptation of the statistical characterization of the set of decomposed signals is developed. The authors develop the theoretical framework for adaptive microstatistic filters for applications where the second-order statistics of the threshold signals are not known, or when they may be nonstationary. A mu... View full abstract»

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  • An overview of hardware/software codesign

    Publication Year: 1992, Page(s):2665 - 2668 vol.6
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    The problem of allocating system function into hardware and software components is one that critically affects the ultimate cost, performance, functionality, manufacturability, and evolution of the system. The fundamental issues and some proposed approaches to this problem are discussed. It is not only important that the initial partitioning into hardware and software be made properly, but also th... View full abstract»

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  • A family of bias circuits for high input swing CMOS operational amplifiers

    Publication Year: 1992, Page(s):3021 - 3024 vol.6
    Cited by:  Papers (3)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A set of three circuits for biasing CMOS amplifiers with rail-to-rail input common-mode range is presented. By controlling the bias current levels, they avoid the large magnitude deviations inherent in these amplifiers with composite input pairs. The deviations are with regard to their value for input voltages in the mid-range between supplies. Thus, the optimization and compensation is facilitate... View full abstract»

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  • BiCMOS process design for mixed-signal applications

    Publication Year: 1992, Page(s):2683 - 2686 vol.6
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Mixed-signal BiCMOS processes must provide for higher-voltage operation and diverse components to support a fragmented market. Most BiCMOS processes have evolved from an existing core 5V CMOS technology. The impact on process design of extending the voltage range and adding analog components is described. The ABCMOS-2 process, whose device cross-sections are shown, is used to illustrate the effect... View full abstract»

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