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Circuits and Systems, IEEE Transactions on

Issue 3 • Date March 1979

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Displaying Results 1 - 11 of 11
  • Comments on "Lower Bounds on the Summed Absolute and Squared Voltage Transfer Sensitivities in RLC Networks

    Publication Year: 1979 , Page(s): 209 - 211
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (269 KB)  

    Weyten's observation based on the worst case sensitivity study of a third-order Butterworth low-pass (LP) filter is questioned. For most practical purposes, the doubly terminated lossless ladder is less sensitive than the singly terminated lossless ladder. View full abstract»

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  • Approximation of low-pass filters with frequency-dependent input gain characteristic

    Publication Year: 1979 , Page(s): 198 - 202
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (448 KB)  

    An approximation method is described for the design of low-pass filters where the input has a frequency-dependent spectrum. These filters are used in speech processing systems. The proposed method, being closed-form solution, is more reliable and requires much less CPU time compared to the previously used methods. The developed algorithm can be incorporated into any suitable general synthesis program. View full abstract»

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  • Roundoff noise and overflow in normal digital filters

    Publication Year: 1979 , Page(s): 154 - 159
    Cited by:  Papers (54)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (640 KB)  

    Minimum-norm realizations of fixed-point digital filters provide guaranteed immunity from autonomous overflow limit cycles. This paper presents an analysis of the relationship between dynamic range and roundoff noise for a class of minimum-norm realizations called "normal." For normal realizations, the eigenvectors of the system matrix form an orthogonal basis for the system state space. An explicit expression for minimum roundoff noise, under an 12 dynamic range constraint, is derived, and means for achieving this minimum are given. The simple expression for minimum roundoff noise permits easy determination, by trial and error, of optimal subfilter structures. Explicit expressions for the state-space parameters of optimal secondorder normal filters are given. View full abstract»

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  • A linear temperature-to-differential-current converter

    Publication Year: 1979 , Page(s): 204 - 206
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (352 KB)  

    A simple circuit is proposed as a linear temperature-to-differential-current converter. Large and accurate conversion rate can be easily obtained. An immediate application has also been proposed. View full abstract»

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  • Optimal design of multirate digital filters with application to interpolation

    Publication Year: 1979 , Page(s): 160 - 165
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (680 KB)  

    This paper extends the Wiener filter theory to the design of an optimum multirate digital filter with emphasis on its application to Interpolation. An efficient recursive procedure, based on linear predictive deconvolution, is introduced to replace the matrix inversion required in solving the Wiener-Hopf equation. This reduces the amount of computation and thus improves numerical stability. A detailed error analysis is included. View full abstract»

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  • Two-port analysis of switched-capacitor networks using four-port equivalent circuits in the z-domain

    Publication Year: 1979 , Page(s): 166 - 180
    Cited by:  Papers (27)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1296 KB)  

    In a previous publication by the authors it was shown how switched-capacitor (SC) networks can be analyzed by using nodal charge equations. The result was a description of SC networks as time-variant sampled-data networks which led to a four-port equivalent circuit representation in the z-domain. In this paper, the four-port representation is expanded by considering six basic building blocks for the design of any general active or passive SC network. With the four-port equivalent circuit representation, traditional two-port analysis tools, such as the transmission matrix and two-port transfer functions, can be used conveniently. An SC-filter design example is given and the measured response is shown to coincide with the response predicted by the theory. View full abstract»

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  • On a canonical synthesis of class-M immittance functions

    Publication Year: 1979 , Page(s): 206 - 209
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (440 KB)  

    A generalization of van Bokhoven's canonical synthesis for a class of immittance functions that can be represented by a product of an RL and an RC impedance, ie, class-M functions, is presented. It is shown that, in general, this synthesis procedure leads to a greater number of realizations because it allows to obtain all those possible of the type given by van Bokhoven. View full abstract»

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  • Synthesis of optimal inhomogeneous ladder networks

    Publication Year: 1979 , Page(s): 190 - 197
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (736 KB)  

    In homogeneous ladder networks in which each ladder series arm impedance is f_{i}z(s) and each shunt arm admittance is g_i y(s) are Investigated. The necessary and sufficient conditions for synthesis of a second-order matrix as a chain matrix of a reciprocal inhomogeneous ladder network are given. It is shown that if the network is either symmetrical or antimetrical, only one chain parameter is needed to specify the network. It is also proven that the necessary and sufficient condition for the sum of all f_i and g_i to be minimum is that the network be either antimetrical or symmetrical with a specified immittance level. View full abstract»

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  • Some results on nonlinear compartmental systems

    Publication Year: 1979 , Page(s): 203 - 204
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (240 KB)  

    It is shown that for a class of nonlinear compaprtmnental systems, every bounded solution converges asymptotically to a constant vector. The result is then used to show that the equilibrium set is arc-wise connected. View full abstract»

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  • Optimal synthesis of second-order state-space structures for digital filters

    Publication Year: 1979 , Page(s): 149 - 153
    Cited by:  Papers (109)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (640 KB)  

    Sufficient conditions are derived for a second-order statespace digital filter with L_2 scaling to be optimal with respect to output roundoff noise; and from these, a simple synthesis procedure is developed. Parallel-form designs produced by this method are equivalent to the block-optimal designs of Mullis and Roberts. The corresponding cascadeform designs are not equivalent, but they are shown, by example, to be quite close in performance. It is also shown that the coefficient sensitivities of this structure are closely related to its noise performance. Hence, the optimal design has low-coefficient sensitivity properties, and any other low-sensitivity design is a good candidate for near-optimal noise performance. The uniform-grid structure of Rader and Gold is an interesting and useful case in point. View full abstract»

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  • On the determination of the Smith-Macmillan form of a rational matrix from its Laurent expansion

    Publication Year: 1979 , Page(s): 180 - 189
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1088 KB)  

    A novel method is presented to determine the SmithMacmillan form of a rational m \times n matrix R(p) from Laurent expansions in its poles and zeros. Based on that method, a numerically stable algorithm is deduced, which uses only a minimal number of terms of the Laurent expansion, hence providing a shortcut with respect to cumbersome and unstable procedures based on elementary transformations with unimodular matrices. The method can be viewed as a generalization of Kublanovkaya's algorithm for the complete solution of the eigenstructre problem for \lambda I - A . From a system's point of view it provides a handy and numerically stable way to determine the degree of a zero of a transfer function and unifies a number of results from multivariable realization and invertibility theory. The paper presents a systematic treatment of the relation between the eigen-information of a transfer function and the information contained in partial fraction or Laurent expansions. Although a number of results are known, they are presented in a systematic way which considerably simplifies the total picture and introduces in a natural way a number of novel techniques. View full abstract»

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