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IEEE Transactions on Circuits and Systems

Issue 12 • December 1987

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Displaying Results 1 - 23 of 23
  • On the validity of a reduction of reliable network design to a graph extremal problem

    Publication Year: 1987, Page(s):1579 - 1581
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (394 KB)

    An undirected connected graph having failure probabilities associated with each edge is a classic model for network reliability studies. The network reliability is defined as the probability that the graph remains connected despite edge failures. It is known that the problem of calculating the network reliability isNP-hard, even when the edge failures are equal and independent. Herein, ... View full abstract»

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  • Design techniques for improved capacitor area efficiency in switched-capacitor biquads

    Publication Year: 1987, Page(s):1590 - 1599
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1063 KB)

    The capacitance ratio constraint for equal op-amp dynamic range is derived in this paper for a collection of important biquad configurations of all filter types. This completes the set of explicit design constraints for the determination of capacitance values. The relations between the total capacitance and design parameters such asomega_{0}T, Qand peak gain are then transparent to the ... View full abstract»

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  • On frequency transformation for nonsymmetric bandpass filters

    Publication Year: 1987, Page(s):1599 - 1601
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    When a bandpass filter has specifications that are not geometrically symmetric, the proper choice of the constantKin the frequency transformationS = (s + K/s)has an effect on the selectivity parameter of the transformed lowpass characteristic. In this note we prove that if the objective is to minimize the selectivity parameter, then the best choice ofKis the produc... View full abstract»

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  • Optimal pole-placement for linear multi-input controllable systems

    Publication Year: 1987, Page(s):1602 - 1604
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (347 KB)

    This paper presents a new method for the design of linear state-feedback controllers for multiinput systems which results in a desired preselected set of distinct closed-loop eigenvalues and simultaneously optimizes a quadratic performance index. The method is based on a computationally efficient algorithm, which constructs the feedback gainmatrix by selecting the optimal closed-loop eigenvectors ... View full abstract»

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  • Systolic realization of linear phase FIR digital filters

    Publication Year: 1987, Page(s):1604 - 1605
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    A novel method for the systolic realization of linear phase FIR digital filters is presented. The method preserves the symmetry properties of the coefficients (i.e., impulse response values) such that the number of multiplications can be reduced by half. Other advantages of this method are nearest neighbor interconnections and only one type of basic cell is required. View full abstract»

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  • Design of maximally-flat FIR filters using the Bernstein polynomial

    Publication Year: 1987, Page(s):1587 - 1590
    Cited by:  Papers (51)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The paper provides, through the use of Bernstein polynomials, a new insight into the design of maximally-flat (MAXFLAT) FIR filters. In particular, it demonstrates a link between the various existing methods, and provides an analytical support to the empirical relation given by Herrmann. It is also shown to provide a new computationally efficient algorithm for the design of such filters. View full abstract»

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  • Infinite electrical networks with finite sources at infinity

    Publication Year: 1987, Page(s):1518 - 1534
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2192 KB)

    Various physical situations leading to the exterior problem for partial differential equations are modeled by infinite electrical networks having finite-valued sources connected to extremities of the network at infinity. Up to now, there was no theory for such a network. The present work establishes one. An existence and uniqueness theorem is proven for a countably infinite resistive network that ... View full abstract»

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  • Low-sensitivity digital filters based on zero extraction

    Publication Year: 1987, Page(s):1581 - 1587
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    A method is proposed for synthetizing digital filters derived from the LBR two-pair extraction technique. The method forces the LBR two-pairs to have their transmission zeros coincident with those of the filter. The basic two-pair having transmission zeros on the unit circle is considered in detail with regard both to the realization problem and to the simplification of the synthesis procedure. In... View full abstract»

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  • A security measure for random load disturbances in nonlinear power system models

    Publication Year: 1987, Page(s):1546 - 1557
    Cited by:  Papers (64)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1544 KB)

    This paper proposes a security measure to indicate vulnerability to voltage collapse in electric power systems. The voltage-collapse phenomenon is modeled as a large deviation in the nonlinear dynamics of the system, driven by small magnitude, broad spectrum disturbances in load. This model relates the collapse to shrinking of the region of attraction for the operating point. The security measure ... View full abstract»

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  • Iterative reconstruction of bandlimited images from nonuniformly spaced samples

    Publication Year: 1987, Page(s):1497 - 1506
    Cited by:  Papers (74)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1232 KB)

    We investigate the reconstruction of band-limited 2-D functions from nonuniformly spaced samples. Three algorithms which iterate between the space and frequency domains are developed. The algorithms differ in the manner in which the known value of the function at sample points is used to correct the reconstruction at each iteration. Convergence of the algorithms is speeded by choosing the largest ... View full abstract»

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  • Computing the total mean square integral

    Publication Year: 1987, Page(s):1615 - 1616
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    First Page of the Article
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  • Design of three-dimensional digital filters using two-dimensional rotated filters

    Publication Year: 1987, Page(s):1452 - 1469
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1656 KB)

    Two techniques for the design of three-dimensional (3-D) filters are introduced in this paper. The first one is based on coefficient transformations of two-dimensional (2-D) circularly symmetric filters. These filters can be designed by cascading 2-D rotated filters. Stability of the 3-D filters designed is discussed and a stabilization procedure based on cepstrum analysis, is proposed. Stable imp... View full abstract»

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  • On one-multiplier implementations of FIR lattice structures

    Publication Year: 1987, Page(s):1608 - 1609
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    One-multiplier realizations for certain recently reported FIR lossless lattice structures are investigated. The multiplier extraction approach is used to show that there does not exist a real one-multiplier realization whereas it is possible to get complex one-multiplier realizations. This is unlike the situation in conventional linear-prediction FIR lattice structures, where real one-multiplier r... View full abstract»

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  • On verification of stability of periodic oscillations in nonlinear systems

    Publication Year: 1987, Page(s):1605 - 1607
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A method for verification of stability of periodic oscillations in nonlinear systems is proposed. The main oscillation is represented in the exponential form and is substituted into the initial differential equation. Then the approximating differential equation with respect to the same exponent is taken. The terms representing higher than the first-order derivatives are omitted in the correspondin... View full abstract»

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  • Maximum-weight markings in marked graphs: Algorithms and interpretations based on the simplex method

    Publication Year: 1987, Page(s):1535 - 1545
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1392 KB)

    The problem of determining a maximum-weight marking in a marked graph is mathematically dual to the transshipment problem of operations research. The special structure of the transshipment problem facilitates efficient implementation of the simplex method of linear programming, for solving such problems. In this paper, we first show that the maximum-weight marking problem possesses as much structu... View full abstract»

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  • On optimizing importance sampling simulations

    Publication Year: 1987, Page(s):1558 - 1563
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    The importance sampling technique can result in large savings in simulation time for simulation of tail probabilities, but only when performed optimally. In this paper, we derive criteria for optimal importance sampling simulation of an arbitrarily weighted sum of independent exponential variates. We illustrate the use of importance sampling for false alarm threshold settings in square law integra... View full abstract»

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  • Modeling and recursive state estimation for two-dimensional noncausal filters with applications in image restoration

    Publication Year: 1987, Page(s):1507 - 1517
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1168 KB)

    Noncausal blurring filters are frequently encountered in applications of 2-D signal processing. In this paper we obtain low-order, equivalent, quarter-plane (QP) causal Roesser separable in denominator state-space models for such noncausal blurring filters. We utilize the equivalent QP causal models to develop a minimum-variance deconvolution (MVD) algorithm, which can be used in image restoration... View full abstract»

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  • Tree-structured complementary filter banks using all-pass sections

    Publication Year: 1987, Page(s):1470 - 1484
    Cited by:  Papers (18)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1672 KB)

    Tree-structured complementary filter banks are developed with transfer functions that are simultaneously all-pass complementary and power complementary. Using a formulation based on unitary transforms and all-pass functions, we obtain analysis and synthesis filter banks which are related through a transposition operation, such that the cascade of analysis and synthesis filter banks achieves an all... View full abstract»

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  • Alias-free, real coefficient m-band QMF banks for arbitrary m

    Publication Year: 1987, Page(s):1485 - 1496
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1328 KB)

    Based on a generalized framework for alias free QMF banks, a theory is developed for the design of uniform QMF banks with real-coefficient analysis filters, such that aliasing can be completely canceled by appropriate choice of real-coefficient synthesis filters. These results are then applied for the derivation of closed-form expressions for the synthesis filters (both FIR and IIR), that ensure c... View full abstract»

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  • An efficient technique to improve NORA CMOS testing

    Publication Year: 1987, Page(s):1609 - 1611
    Cited by:  Papers (3)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    This paper presents a novel circuit technique to improve the testability of NORA (NO RAce) CMOS circuits. It is based on the structure, properties and operations of NORA CMOS. The precharge and evaluation properties of NORA CMOS enable one to design simple testing circuit for output stuck-at-zero, stuck-at-one, stuck-open and stuck-on faults. Area and time considerations, as well as the applicatio... View full abstract»

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  • Explicit formulas for analyzing general switched-capacitor networks

    Publication Year: 1987, Page(s):1564 - 1578
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1424 KB)

    Explicit formulas are derived for analyzing switched-capacitor (SC) networks of the most general type. Using these formulae a simple analysis method is obtained to compute the frequency-domain responses of multiphase SC networks containing real resistors. The formulas presented in this paper make it possible to specify arbitrary switch timing waveforms and to insert arbitrary built-in input and/or... View full abstract»

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  • The LUD approach to switched-capacitor filter design

    Publication Year: 1987, Page(s):1611 - 1614
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A new design method for switched-capacitor filters (SCF) is presented. It is based upon an LU matrix decomposition technique and has the distinct advantage of producing SC filter realizations containing no delay free loops. These are formed traditionally by capacitors and opamps in leapfrog realizations. It is demonstrated that this feature should render reduced dependence of the filter response t... View full abstract»

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  • Minimal area design of power/ground nets having graph topologies

    Publication Year: 1987, Page(s):1441 - 1451
    Cited by:  Papers (23)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1296 KB)

    This paper deals with one aspect of routing power and ground nets in integrated circuits composed of modules, where the nets are routed in the channels between the modules. Constraints are assumed on allowable voltage drops for maintaining proper logic levels and switching speed. A procedure for determining the width of routes in power and ground multi-pad distribution systems having graph topolog... View full abstract»

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