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IEEE Transactions on Circuits and Systems

Issue 12 • Dec 1985

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Displaying Results 1 - 19 of 19
  • A general family of multivariable digital lattice filters

    Publication Year: 1985, Page(s):1234 - 1245
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1240 KB)

    Lattice structures are developed for the realization of m -input p -output discrete-time all-pass transfer matrices H(z) , given in the form of a right matrix-fraction description (MFD): H(z)= N(z)D^{-l}(z) View full abstract»

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  • Frequency-domain design of N-D digital filters

    Publication Year: 1985, Page(s):1226 - 1233
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    This paper investigates the problem of designing N-D (N > 2) IIR digital filters. An I_{p} design technique for N-D (N> 2) IIR digital filters is proposed. The minimization technique described is a new adaptive parallel targent (PARTAN) method which requires only the computation of... View full abstract»

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  • On the expected passband ripple of cascade RC active filters with random element variations

    Publication Year: 1985, Page(s):1220 - 1225
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A lower bound has been derived on the expectation of passband ripple for cascade type RC active filters with random element variations. Without performing a detailed sensitivity analysis, it can indicate that a cascade connection of first-and second-order building blocks would fail to satisfy given tolerance requirements, and a more subtle design method should... View full abstract»

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  • On BIBO- stability and nonessential singularities of the second kind

    Publication Year: 1985, Page(s):1311 - 1312
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    The open problem of the BIBO-stability of 2-D digital filters in the presence of nonessential singularities of the second kind on the distinguished boundary of the unit bidisk has attracted a lot of interest in the recent past [1]-[5]. One of the reasons for its importance is the practical need for the generation of BIBO-stable digital filters at the design stage. View full abstract»

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  • Analysis of pulse propagation in coupled transmissions

    Publication Year: 1985, Page(s):1214 - 1219
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    A model describing transient propagation in multiconductor strip transmission lines supporting transverse electromagnetic waves travelling at different velocities has been implemented. The model uses a transform approach to derive the closed-form expressions for the line voltages and currents in the time domain and assumes linearity of the terminations as well as frequency independence of the elec... View full abstract»

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  • An application of complex branch modeling to nonreciprocal power transmission elements

    Publication Year: 1985, Page(s):1292 - 1295
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The complex branch modeling technique developed by Bandler and El-Kady is applied to derive exact first-order sensitivity formulas for nonreciprocal power transmission elements. An adjoint model of a cascaded phase-shifting transformer model comprising an ideal transformer in series with an equivalent impedance is developed elegantly. The sensitivity formulas for the turns ratio magnitude and phas... View full abstract»

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  • A counterexample to 2-D Lyapunov equations by Mertzios

    Publication Year: 1985, Page(s):1310 - 1311
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    In [1], Mertzios introduced two-dimensional (2-D) Lyapunov equations for the covariance and noise matrices to analyze the output roundoff noise under l_{2} -norm scaling in 2-D digital filters described by the local state-space model. However, his 2-D Lyapunov equations include some crucial errors. This paper presents a counterexample to his 2-D Lyapunov equa... View full abstract»

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  • Planar least squares inverse polynomials and practical-BIBO stabilization on n- dimensional linear shift-invariant filters

    Publication Year: 1985, Page(s):1255 - 1260
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Development of simple procedures for the design of stable recursive n-dimensional (n -D) filters continues to be an important field of study. Because of the involved computations required to incorporate the stability constraints in the design stage, the search for a technique by which the stability problem could be separated from the approximation problem is... View full abstract»

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  • Broad-band internally and externally matched lumped element symmetrical 5-ports

    Publication Year: 1985, Page(s):1209 - 1213
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Some new broad-band internally matched lumped element 5-port networks are proposed. In one case different lumped element circuits connect adjacent and nonadjacent ports. In another version, with a 20/1 bandwidth, ideal transformers are required. It is shown how the bandwidth of these lumped element circuits may be further increased by including external matching. View full abstract»

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  • Odd harmonic periodic solutions of systems with odd nonlinearities

    Publication Year: 1985, Page(s):1281 - 1285
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    The connection between odd nonlinearities in dynamical systems and oscillations with no even harmonics is studied. It is found that when using harmonic balance techniques, one can often ignore even harmonics with no loss of generality as long as the nonlinearity is odd. It is shown that results on nonexistence of oscillations which ignore even harmonics are often valid results on nonexistence of g... View full abstract»

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  • On power-complementary FIR filters

    Publication Year: 1985, Page(s):1308 - 1310
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    Conditions are derived, under which two linear-phase FIR filter transfer functions H(z) and G(z) have the power-complementary property, i.e., |H(e^{j \omega })|^{2} + |G(e^{j\omega })|^{2} = 1 . It is shown that, the constraint of linear phase on the transfer functions strongly res... View full abstract»

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  • State and output feedback stabilizability of 2-D systems

    Publication Year: 1985, Page(s):1246 - 1254
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    In this paper a controller theory is introduced for multivariable 2-D systems together with stabilization algorithms based on state and output feedback techniques. View full abstract»

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  • Reliable circulant networks with minimum transmission delay

    Publication Year: 1985, Page(s):1286 - 1291
    Cited by:  Papers (65)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    It is well known that maximum connectivity graphs play an important role in the design of reliable networks. The class of symmetric graphs called circulants is known to contain such maximum connectivity graphs. Although not all circulants have this maximum connectivity property, those that do have a great variation in their diameters. Since diameter is a measure of transmission delay, the minimum ... View full abstract»

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  • Broad-band impedance matching of ladder loads

    Publication Year: 1985, Page(s):1201 - 1208
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    This paper considers the design of low-pass, bandpass, and high-pass networks which match a generator impedance to a ladder load consisting of any number of reactive elements and one resistor. For loads consisting of only two reactive elements consistent with the given passband, a low-pass, high-pass, or bandpass match is shown to be possible in every case without resort to coupled coils. Consider... View full abstract»

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  • On the global asymptotic stability of off-diagonally monotone dynamical systems

    Publication Year: 1985, Page(s):1261 - 1269
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    Global asymptotic stability of off-diagonally monotone nonlinear dynamical systems are studied. It is proved in this paper that if the nonlinear functions on the right hand sides are M -functions with negative signs then the systems are globally asymptotically stable without any more restrictive conditions whenever they have equilibrium points. To prove this th... View full abstract»

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  • Singularly perturbed Hopf bifurcation

    Publication Year: 1985, Page(s):1270 - 1280
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1320 KB)

    Hopf bifurcation is the simplest way in which periodic solutions can emerge from an equilibrium point of an autonomous one-parameter family of ordinary differential equations. The phenomenon occurs if the linearized system has a pair of complex-conjugate simple eigenvalues which cross the imaginary axis transversely for some value of the parameter. In this paper, conditions are derived which ensur... View full abstract»

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  • On the inversion of 2-D systems

    Publication Year: 1985, Page(s):1298 - 1303
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    The local state 2-D model of Givone-Roesser is considered together with the equivalent 1-D wave advance process. Selected aspects of the 1-D system inverse literature are applied to the 1-D state model. Implications for the design of 2-D system inverses are developed. View full abstract»

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  • Stability of a class of 2-D recursive filters without distortion of the amplitude spectrum

    Publication Year: 1985, Page(s):1296 - 1298
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    In this paper, we introduce the concept of reciprocity for two-dimensional (2-D) polynomials, and it is shown that a 2-D polynomial and its reciprocal have the same amplitude spectra. This concept is applied to stabilize a class of 2-D recursive filters being unstable due to all singularities occuring within the unit hypercircle. This method is simple and provides a stabilized filter without any d... View full abstract»

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  • On the evaluation of the Fourier series coefficients in the design of digital FIR filters

    Publication Year: 1985, Page(s):1304 - 1308
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    In the design of FIR digital filters by the windowing technique, the unwindowed Fourier series coefficients h(n) are required. In practice, however, it is often difficult to evaluate these coefficients. In this paper, we propose two computational procedures to calculate the unwindowed Fourier series coefficients. Their analytic formulas are derived; their co... View full abstract»

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