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Circuits and Systems, IEEE Transactions on

Issue 2 • Date February 1978

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Displaying Results 1 - 13 of 13
  • Correction to 'Circuit Theoretic Analysis and Synthesis of Marked Graph'

    Publication Year: 1978 , Page(s): 117
    Cited by:  Papers (1)
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  • A formulation of nonlinear dynamic networks

    Publication Year: 1978 , Page(s): 88 - 98
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    Some properties on the structure of dynamic equations and a method of systematic formulations of a fairly general class of nonlinear RLC networks and lumped parameter active networks are presented. It is shown that by a differential and integral transformation such that each range of network variables becomes a standard function space, the equation and solution are described by synthetic operators of a certain standard type. The solution is then, definitely computable. Conditions for the unique solvability, which are given by global invertibility of the synthetic operator describing the equation, are derived from the contraction mapping theorem in a Banach space. These conditions are finally expressed in terms of differential coefficients of branch characteristics. View full abstract»

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  • On a series-parallel-cascade structure

    Publication Year: 1978 , Page(s): 111 - 112
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    It is shown that series-parallel RC-grounded two-port cascade network, which has a non-series-parallel structure, provides another counter example to Darlington's conjecture. The result depends upon the construction of a numerical example for series-parallel RC-grounded two-port cascade network having a non-series-parallel structure. The example cannot be equivalent to any RC series-parallel two-port network. View full abstract»

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  • A state-space realization for transfer functions

    Publication Year: 1978 , Page(s): 79 - 88
    Cited by:  Papers (3)
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    This paper presents a new approach to the realization of rational transfer functions via state-variable methods. The resulting structures use an RC ladder network, n voltage followers, and two summers with appropriate scalings, where n is the degree of the characteristic polynomial of the given transfer function. The nonsingular transformation matrix Q that relates two state-space realizations plays an important role in our approach. View full abstract»

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  • Constant group delay approximation by series of Bessel polynomials

    Publication Year: 1978 , Page(s): 107 - 109
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (264 KB)  

    The transfer function obtained from the tuncated expansion of exp(p) in series of Bessel polynomials yield an approximation of the ideal filter. Thanks to a freely chosen parameter, it is possible to control the compromise between optimal amplitude and phase or between the rise time and the overshoot of the step response. Compared to the classical Thomson characteristic, which is linked to a single Bessel polynomial, the delay deviation in the passband is smaller. View full abstract»

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  • An approach to band-limited signal extrapolation: The extrapolation matrix

    Publication Year: 1978 , Page(s): 74 - 78
    Cited by:  Papers (47)  |  Patents (1)
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    A fast band-limited signal extrapolation technique is presented where the total extrapolation process is achieved by a single matrix operation. The proposed technique and its implementation has many advantages over known extrapolation techniques in terms of computational savings and accuracy of the results, and it can he operated on a realtime basis. View full abstract»

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  • On the realization of third-order paramount matrices-A rebuttal

    Publication Year: 1978 , Page(s): 116 - 117
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  • Construction of constant resistance networks using the properties of two-dimensional regions with antisymmetry

    Publication Year: 1978 , Page(s): 109 - 111
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (328 KB)  

    A self-dual one-terminal-pair graph with respect to vertices ( i and j ) can be realized 4(p_{i} + p_{j})- 11 edges and 2(p_{i} + p_{j})-6 vertices for p_{i} > 3 and p_{j} > 3 , where p_{i} and p_{j} are the degrees of ( i and j ). View full abstract»

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  • Large-change sensitivities of linear digital networks

    Publication Year: 1978 , Page(s): 113 - 114
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (216 KB)  

    Crochiere's result for the large-change sensitivity of a linear digital network to changes of one of its parameters is rederived frnst using a simple physical argument. The same reasoning is then used to generalize the relation to the case of multivariable sensitivity, involving large simultaneous changes in several parameters. View full abstract»

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  • Lower bounds on the summed absolute and squared voltage transfer sensitivities in RLC networks

    Publication Year: 1978 , Page(s): 70 - 73
    Cited by:  Papers (5)
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    Simple lower bounds are presented for the summed absolute and summed squared sensitivities of voltage transfer to components in passive RLC networks. Those bounds are functions of the voltage transfer only, and independent of the circuit configuration. View full abstract»

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  • Bauer-type factorization of positive matrices and the theory of matrix polynomials orthogonal on the unit circle

    Publication Year: 1978 , Page(s): 57 - 69
    Cited by:  Papers (48)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1168 KB)  

    In this paper it is shown that a technique due to Bauer for the Wiener-Hopf factorization of scalar polynomials that are nonnegative on the unit circle, can be extended to arbitrary integrable periodic n \times n nonnegative-definite Hermitian matrices K(\theta) which satisfy the Paley-Wiener criterion. This is the most general possible setting. The resulting algorithm agrees with the one derived recently by Rissanen and Kailath but is established in an elementary manner without the imposition of any unnecessary constraints. The method also supplies some detailed information regarding the nature of the convergence. An important byproduct of the analysis is the clarification of the role played in spectral factorization by two sets of matrix orthogonal polynomials generated by the weight K(\theta) . These polynomials can be generated recursively and a study of their limiting properties reveals that they provide an effective alternative scheme for the construction of the desired Wiener-Hopf factor. Since the matrix K(\theta) is not restricted to be the boundary value of some rational matrix, the algorithm can also be employed in the solution of many different types of electromagnetic field problems centered around the Wiener-Hopf idea. View full abstract»

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  • Simulation of excess phase in bipolar transistors

    Publication Year: 1978 , Page(s): 114 - 116
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (328 KB)  

    Techniques for simulating excess phase in bipolar models are described. An algorithm is developed for incorporating excess phase directly into normally existing companion network elements for transient as well as ac analysis. The algorithm is shown to yield the same accuracy as a full network representation of the function and without enlarging the simulator circuit matrix. A second-order function is utilized for modeling excess phase. View full abstract»

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  • Distortion analysis of transistor networks

    Publication Year: 1978 , Page(s): 99 - 106
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (904 KB)  

    Two numerical methods for distortion analysis of transistorized networks are compared. One, based on Volterra series expansions, is generally accepted as being useful for small signals and mildly nonlinear systems. The other is a new piecewise harmonic balance technique which works for small as well as large signals. For very small signals, both methods give identical results. If the signals are moderately large or the system moderately nonlinear, the Volterra series method gives erratic and incorrect results and breaks down completely for large signals. View full abstract»

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