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IEEE Transactions on Circuits and Systems

Issue 10 • Oct 1988

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Displaying Results 1 - 19 of 19
  • On matrix fraction descriptions of multivariable linear n-D systems

    Publication Year: 1988, Page(s):1317 - 1322
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    An examination is presented of a matrix fraction description (MFD) of multivariable linear n-D (n⩾3) systems. By introducing a concept called generating polynomials, several interesting properties of n-D polynomial and rational matrices in connection with MFDs of n-D have been obtained. These properties do not occur in the 1-D and 2-D cases, which explains t... View full abstract»

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  • Application of interval analysis techniques to linear systems. II. The interval matrix exponential function

    Publication Year: 1988, Page(s):1230 - 1242
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    For pt.I see ibid., vol.35, no.9, p.1129-38 (1988). In part I the authors established new results for continuous and rational interval functions which are of interest in their own right. The authors use these results to study interval matrix exponential functions and to devise a method of constructing augmented partial sums which approximate interval matrix exponential functions as closely as desi... View full abstract»

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  • Frequency limitations in circuits composed of linear devices

    Publication Year: 1988, Page(s):1299 - 1307
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    The author investigates limitations on the frequency response of networks constructed out of components specified by their small signal models. Tellegen's theorem is used to find tight bounds on the maximum frequency of oscillation. The problem is reduced to deciding whether zero is in the numerical range of a complex non-Hermitian matrix. A decision method is presented, and transistor and negativ... View full abstract»

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  • Equivalence of block and N-path implementations of digital filters

    Publication Year: 1988, Page(s):1326 - 1330
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    It is established that the block implementation and the multipath realizations of digital filters are equivalent. This is done by showing that the matrix transfer functions of both implementations are identical. An example to demonstrate this is provided. It is shown that the direct implementation of block realization requires considerably less hardware compared to that of multipath realizations f... View full abstract»

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  • A method for relaxing tolerance requirements in RC filters

    Publication Year: 1988, Page(s):1311 - 1317
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    In an adjustable assembly, the problem is to reduce overall adjustments from many high-precision adjustments to a few high-precision and larger number of low-precision adjustments. The present application is the high-volume manufacture of RC active filters. The Lopresti method for filter tuning is used. The author presents a method for mathematically selecting the minimum number of resist... View full abstract»

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  • Explicit expressions for the parameter σ in two-pair cascaded realization of digital transfer functions

    Publication Year: 1988, Page(s):1342 - 1343
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (108 KB)

    The authors provide simple explicit expressions for the parameter σ for the three types of two-pairs used by P.P. Vaidyanathan and S.K. Mitra (1982, 1984) in the synthesis of bounded real digital transfer functions. The most evident application of these new results is in automated procedures for digital filter design based on the two-pair extraction approach View full abstract»

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  • Design of selective linear phase bandpass switched-capacitor filters with equiripple passband amplitude response

    Publication Year: 1988, Page(s):1220 - 1229
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    A novel approach is presented to the design and synthesis of switched-capacitor (SC) filters. An efficient iterative algorithm is described for the construction of a class of selective linear-phase bandpass filter with equiripple passband amplitude response. The solution is obtained in terms of digital linear phase bandpass polynomials. A novel SC implementation is performed using an approach base... View full abstract»

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  • Algorithms for Z-domain continued fraction expansion by Davis

    Publication Year: 1988, Page(s):1338 - 1339
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    The authors cast the algorithm for computing the Z-domain continued fraction expansion by A.M. Davis (1982) in the form of a three-term recurrence relation. Such a recurrence relation processes a mirror image polynomial and an anti-mirror image polynomial alternately. The algorithms derived are at least twice as efficient in computational complexity as the algorithms recently proposed by ... View full abstract»

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  • A geometric approach to the feedback control of switch mode DC-to-DC power supplies

    Publication Year: 1988, Page(s):1291 - 1298
    Cited by:  Papers (62)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    Using the theory of variable structure systems (VSSs), a geometric approach is presented for the analysis and design of control schemes in bilinear DC-to-DC switch-mode power supplies. A time scale separation property, which naturally describes desirable transient behavior of the power converter, is used to identify the slow manifold of the average system in which a stable sliding mode trajectory ... View full abstract»

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  • Recursive two-dimensional median filtering algorithms for fast image root extraction

    Publication Year: 1988, Page(s):1323 - 1326
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The authors develop and evaluate two new two-dimensional fast recursive median filtering algorithms, for image root extraction. The first recursive algorithm, which is called the fast binary root algorithm, converges to a root of a binary image in one pass including a number of local rescans. The second is referred to as the fast multilevel root algorithm. It converges to a root of a multilevel im... View full abstract»

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  • Application of interval analysis techniques to linear systems. III. Initial value problems

    Publication Year: 1988, Page(s):1243 - 1256
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    For pt.II see ibid., vol.35, no.10, p.1230-42 (1988). The authors develop an algorithm which enables them to obtain estimates of bounds for the set of all solutions of initial-value problems of linear systems of autonomous first-order ordinary differential equations that linearly depend on a parameter belonging to an interval. They demonstrate the applicability of their results by considering thre... View full abstract»

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  • A matched lumped element five-port which is based on the comparator circuit

    Publication Year: 1988, Page(s):1307 - 1311
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Recently, a very broadband matched lumped element symmetrical five-port was described. The synthesis of this circuit required 23 ideal transformers. An alternate lumped element broadband matched five-port is described that requires only four frequency invariant 180° hybrids for its synthesis. The linear S matrix element-S matrix eigenvalue relations for this nonsymmetrical fi... View full abstract»

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  • An adaptive filter for noise cancelling

    Publication Year: 1988, Page(s):1201 - 1209
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    The author introduces a nonlinear filter for adaptive noise cancelling. The derivation and convergence properties of the filter are presented. The performance, as measured by the signal-to-noise ratio between the signal and its estimate, is compared to that of the commonly used least-mean-square (LMS) algorithm. It is shown, through simulation, that the proposed canceller has, on the average, bett... View full abstract»

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  • Piecewise-linear timing delay modeling for digital CMOS circuits

    Publication Year: 1988, Page(s):1330 - 1334
    Cited by:  Papers (13)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    A simple and accurate timing delay characterization algorithm for digital complementary metal-oxide-semiconductor (CMOS) circuits is presented. To reflect various nonlinear effects in metal-oxide-semiconductor circuits, the author uses reliable circuit simulations and measurements to generate various timing data for the most typical subcircuit structures with various driving and loading conditions... View full abstract»

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  • On limit cycles in one- and multi-dimensional digital filters

    Publication Year: 1988, Page(s):1339 - 1342
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    A method for determining limit cycles in digital filters due to rounding or truncation is presented. The model proposed by D.S.K. Chan (1978, 1980) is used to determine the bounds of limit cycle oscillations. Then the approach is extended by two additional steps in order to obtain closer bounds. Finally, the maximum limit cycle oscillation can be computed View full abstract»

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  • Cellular neural networks: theory

    Publication Year: 1988, Page(s):1257 - 1272
    Cited by:  Papers (2956)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1024 KB)

    A novel class of information-processing systems called cellular neural networks is proposed. Like neural networks, they are large-scale nonlinear analog circuits that process signals in real time. Like cellular automata, they consist of a massive aggregate of regularly spaced circuit clones, called cells, which communicate with each other directly only through their nearest neighbors. Each cell is... View full abstract»

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  • Lagrange multiplier approach to the design of FIR filters for multirate applications

    Publication Year: 1988, Page(s):1210 - 1219
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    The method of Lagrange multipliers is presented for the design of optimal finite-duration impulse-response (FIR) digital filters for multirate signal processing applications. The filter passbands are constrained to be maximally flat, and the integral of the aliasing error is minimized. The use of these optimality criteria for practical applications is justified. It is shown that the overall freque... View full abstract»

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  • On optimal routing trees

    Publication Year: 1988, Page(s):1335 - 1337
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    The authors consider the problem of transforming a routing matrix to an optimal routing tree where the cost of a tree is the sum of the link costs. A routing tree is called alphabetical if the partition at each internal node is always into components of consecutive categories. The authors give a cubic algorithm for the optimal alphabetical routing tree problem. They also solve the optimal routing ... View full abstract»

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  • Cellular neural networks: applications

    Publication Year: 1988, Page(s):1273 - 1290
    Cited by:  Papers (1316)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2924 KB)

    The theory of a novel class of information-processing systems, called cellular neural networks, which are capable of high-speed parallel signal processing, was presented in a previous paper (see ibid., vol.35, no.10, p.1257-72, 1988). A dynamic route approach for analyzing the local dynamics of this class of neural circuits is used to steer the system trajectories into various stable equilibrium c... View full abstract»

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