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IEEE Transactions on Circuits and Systems

Issue 5 • May 1986

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Displaying Results 1 - 18 of 18
  • Op-amp relocation: A topological active network synthesis

    Publication Year: 1986, Page(s):469 - 475
    Cited by:  Papers (22)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    Methods are presented for generating ideal op-amp circuits by relocating the op-amp in a given realization. Formulas are developed for determining, by inspection, the minimum number of realizations which have identical network equations or which have the same characteristic equation. It is shown that the basic 3-op-amp Mikhael-Bhattacharyya RC active filter has at least 95 other possible 3-op-amp ... View full abstract»

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  • Design of stable two-dimensional IIR filters using digital spectral transformations

    Publication Year: 1986, Page(s):483 - 490
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    In this paper, a new theory is presented for the design of 2-D IIR filters using the transformationZ = H_1(z_1)H_2(z_2), whereH_1(z_1)andH_2(z_2)are stable, digital spectral transformations, originally proposed by Constantinides for a different purpose. This transformation is found to be analogous to McClellan's transformation for designing 2-D FIR filters like the... View full abstract»

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  • On the sensitivity of linear state-space systems

    Publication Year: 1986, Page(s):502 - 510
    Cited by:  Papers (109)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (977 KB)

    This paper contains new measures to describe the transfer function sensitivity of state-space systems with respect to value and parameter perturbations. These measures are related to the newly defined generalized Gramian matrices. The value respecting the parameter variations contains the sensitivity at discrete frequency points, pole and zero sensitivities and the integral sensitivity as special ... View full abstract»

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  • Canonical piecewise-linear modeling

    Publication Year: 1986, Page(s):511 - 525
    Cited by:  Papers (103)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1508 KB)

    To take advantage of the remarkable computational efficiency of the canonical piecewise-linear approach for dc nonlinear electronic circuit analysis, the devices must be modeled by a canonical piecewise-linear model. This paper presents a unified parameter optimization algorithm for constructing such models. This algorithm is then applied to derive prototype canonical piecewise-linear models of View full abstract»

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  • The solution of the two-dimensional polynomial equationb(z_1,z_2)f(z_1,z_2) + a(z_1,z_2)g(z_1,z_2) = h(z_1,z_2)

    Publication Year: 1986, Page(s):542 - 544
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (322 KB)

    This paper proposes an algorithm for finding the solution of the two-dimensional (2-D) Diophantine equation. The solution, when it exists, is not unique. However, the solution with minimal degrees is unique and can be achieved by this algorithm. An example is given to illustrate the procedure. The method is also applied to determine if two polynomial functions are zero coprime (ZC) or not. They ca... View full abstract»

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  • A simplified algorithm for testing stability of discrete systems via bilinear continued fractions

    Publication Year: 1986, Page(s):544 - 547
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (445 KB)

    An algorithm for testing stability of discrete systems, using methods in thez-domain exclusively, is presented. The algorithm is based on expanding the bilinear discrete reactance function intoz-domain continued fractions in a mixed fashion. It is faster than Steffen's algorithm and compares favorably with the commonly used tabular form of testing stability. The new algorithm... View full abstract»

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  • Voltage - current digital filters with zero magnitude sensitivity in attenuation zeros

    Publication Year: 1986, Page(s):547 - 551
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    A synthesis technique for 1-D and 2-D digital filters is described. In the filter attenuation zeros, the proposed structure exhibits zero magnitude differential sensitivity with respect to most of the coefficients. This structure is obtained from the voltage-current flow graph of the 1-D and 2-D doubly loaded analog lossless ladder prototype by the bilinear transformation of the variables View full abstract»

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  • A first-in, first-out memory for signal processing applications

    Publication Year: 1986, Page(s):556 - 558
    Cited by:  Papers (4)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (403 KB)

    This paper describes the design and implementation of a First-In, First-Out (FIFO) memory for signal processing applications. The FIFO design allows concurrent input and output of data, both operations requiring one clock period each. The design is based on 4muNMOS technology and operates with a 8-MHZ clock. The length of the FIFO is programmable, resulting in minimum data ripple-throug... View full abstract»

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  • Simple 'neural' optimization networks: An A/D converter, signal decision circuit, and a linear programming circuit

    Publication Year: 1986, Page(s):533 - 541
    Cited by:  Papers (1891)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    We describe how several optimization problems can be rapidly solved by highly interconnected networks of simple analog processors. Analog-to-digital (A/D) conversion was considered as a simple optimization problem, and an A/D converter of novel architecture was designed. A/D conversion is a simple example of a more general class of signal-decision problems which we show could also be solved by app... View full abstract»

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  • Further results on possible root locations of 2-D polynomials

    Publication Year: 1986, Page(s):566 - 569
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Some further results on possible root locations of two-dimensional (2-D) polynomials are presented. It is established that the distinguished boundary of the unit bidisc being free of zeros is a nongeneric property of 2-D polynomials. The result is illustrated by a simple example. View full abstract»

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  • Qualitative analysis of oscillations in nonlinear control systems: A describing function approach

    Publication Year: 1986, Page(s):562 - 566
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    We present a rigorous analysis of the stability of oscillations in a wide class of nonlinear control systems with numerator dynamics. The analysis employs the classical sinusoidual-input describing function, elementary control theory, and the theory of integral manifolds. We demonstrate, by means of specific examples, how the present results can be used to obtain detailed information concerning th... View full abstract»

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  • Stability of 2- D digital filters under parameter variations

    Publication Year: 1986, Page(s):476 - 482
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The relationship between the stability margins of a 2-D digital filter (or discrete system) and the norm of the transition matrix of its minimum-norm realization is considered. Upper bounds on parameter variations, which guarantee the stability of a perturbed 2-D digital filter, are then derived in terms of the minimum norm. The results obtained are illustrated by two examples. View full abstract»

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  • Model reduction of two-dimensional discrete systems

    Publication Year: 1986, Page(s):558 - 562
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    In this paper the one-dimensional (1-D) reduction method of Badreddin-Mansour is extended to two-dimensional (2-D) discrete systems. It is found by counterexample that contrary to the 1-D case, stability is not guaranteed, for the reduced model, in general. However, stability is guaranteed for the reduced model if the original system is stable, in the following two cases: (1) the original system i... View full abstract»

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  • RNS cellular arrays

    Publication Year: 1986, Page(s):526 - 532
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    The residue number system (RNS) is receiving increased attention due to its ability to support high-speed arithmetic. To convert this body of knowledge into practice, custom VLSI devices will be needed. In this work, procedures by which a set of identical RNS-VLSI chips of small wordlength can be integrated into a wide wordlength system are presented. The mathematical structure of such an intercon... View full abstract»

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  • Design of minimum-phase FIR digital filters by differential cepstrum

    Publication Year: 1986, Page(s):570 - 576
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The differential cepstrum is introduced to design equiripple minimum phase FIR filters by using cepstral deconvolution; this fast procedure only takes three FFT computation and avoids the complicated phase wrapping and polynomial root-finding algorithms. View full abstract»

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  • Accurate Predistorted Design of Single Op Amp Active Filters

    Publication Year: 1986, Page(s):576 - 580
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    A general method of forcing the transfer function of a second-order active filter to have poles in the desired location is presented. Closed-form formulas for predistorted design of commonly used filters have been derived and tabulated for designer's reference. View full abstract»

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  • Optimal design using min - max criteria for two-dimensional recursive digital filters

    Publication Year: 1986, Page(s):491 - 501
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1224 KB)

    This paper concerns design techniques for two-dimensional recursive digital filters in the frequency domain. The filters are designed so as to approximate simultaneously prescribed specifications of magnitude and group delay by treating the coefficients of the transfer function as decision variables. These approximation problems are formulated as minimizing the maximum errors between the filter's ... View full abstract»

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  • Simple approach for a class of linear time-varying digital filters with generalized delay elements

    Publication Year: 1986, Page(s):552 - 555
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Belal-Shenoi transform [1] and Huang-Aggarwal theorem [2] can be combined to form a simple approach for solving a class of the linear time-varying difference equations with generalized delay elements; Some examples have been worked out to illustrate the powerfulness of this approach. View full abstract»

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