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IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications

Issue 9 • Date Sep 1995

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Displaying Results 1 - 9 of 9
  • Structure simplification of nonrecursive 2-D digital filters: a new L error bound

    Publication Year: 1995, Page(s):538 - 541
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    This brief presents an error analysis for the SVD-based structure simplification method. Specifically, we derive a new L error bound for the simplification strategy. The error bound obtained is very tight as compared to the existing bound. The significance of having such a bound is twofold. First, if the frequency response of the original function is satisfactory and the error bo... View full abstract»

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  • The sensitivity of envelope-constrained filters with uncertain input

    Publication Year: 1995, Page(s):509 - 516
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    In this paper, we consider a class of envelope-constrained filters with uncertain input (ECUI). The ECUI problem was first formulated as a nonsmooth optimization problem. Recently, it was shown that a nonsmooth optimization problem of this type is, in fact, equivalent to a standard quadratic mathematical programming problem. Thus, it admits a unique solution which can be obtained efficiently by th... View full abstract»

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  • Stability of ideal thyristor and diode switching circuits

    Publication Year: 1995, Page(s):517 - 529
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1220 KB)

    This paper analyzes the stability of a general RLC circuit with ideal thyristors or diodes and periodic sources. Applications include high power thyristor controlled reactor and bridge rectifier circuits. The periodic steady states of the circuit are analyzed using a Poincare map and transversality conditions are given to guarantee the smoothness of the Poincare map. A simple and exact formula for... View full abstract»

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  • Nullor-based design of compensators for fast transient recovery of switching regulators

    Publication Year: 1995, Page(s):535 - 537
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    Compared to linear regulators, switching regulators are much slower in response to sudden load change. The dynamics are usually improved by introducing proper feedback loops whose design is based on frequency domain techniques and some appropriate models of the power stage. Fast transient recovery is generally difficult to achieve. In this paper, we present a new approach to designing compensators... View full abstract»

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  • Parallel (quasi-periodic) ferroresonant oscillations in electrical power systems

    Publication Year: 1995, Page(s):530 - 534
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    Quasi-periodic oscillation, hitherto unobserved in power systems, was first experienced in the French grid. Besides obtaining the numerical solution of a set of differential equations or using the method of circle maps, there are no known simple analytical tools available to study conditions for the occurrence of quasi-periodic oscillations. In this paper, quasi-periodic oscillations are analyzed ... View full abstract»

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  • On the analysis and synthesis of robust strict positive real systems

    Publication Year: 1995, Page(s):553 - 556
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    As the first main result, this paper presents a criterion which is very easy to be tested for robust strict positive realness of perturbed systems. Then, it considers such two problems as follows: 1) When does there exist a real polynomial, or more generally, a real transfer function B(s), such that B(s)/D(s) is strict positive real (SPR) for all D(s)∈D, D is a convex polytopic polynomial fam... View full abstract»

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  • On rectangle intersection and overlap graphs

    Publication Year: 1995, Page(s):549 - 553
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Let R be a family of isooriented rectangles in the plane. A graph G=(V, E) is called a rectangle intersection (respectively, overlap) graph for R if there is a one-to-one correspondence between V and R such that two vertices in V are adjacent to each other if and only if the corresponding rectangles in R intersect (respectively, overlap) each other. We first prove that the maximum independent set ... View full abstract»

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  • A pixel scale digital to analog converter array for liquid crystal on VLSI displays

    Publication Year: 1995, Page(s):545 - 548
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    A pixel scale digital to analog converter and driver for liquid crystal (LC) cells is presented. The circuit is a compact CMOS logic gate that sums pulse density modulation (pdm) signals. Low pass filtering of the pdm signal is done by the LC material. The circuit is suitable to implement large arrays of converters as, for example, in display applications. It is applicable in LC on silicon display... View full abstract»

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  • A separation theorem for finite precision digital filters

    Publication Year: 1995, Page(s):541 - 545
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    For models of zero-input direct-form digital filters implemented in fixed-point digital hardware, it is known that if saturation arithmetic is used, and stability holds when the quantization is ignored, then the amplitude of all limit cycles can be made arbitrarily small by making the bound on the magnitude of the quantization sufficiently small. In that sense the effects of quantization and overf... View full abstract»

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