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

Issue 5 • May 1994

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Displaying Results 1 - 10 of 10
  • Robust state estimation of electric power systems

    Publication Year: 1994, Page(s):349 - 358
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (932 KB)

    The exact fit points of the Least Median of Squares (LMS) and the Least Trimmed Squares (LTS) estimators in electric power systems are investigated. The expression of the maximum possible exact fit point δ*max is derived, and the corresponding quantile index ν of the ordered squared residual is determined. It is found that δ*max as well as ν hinge on the sur... View full abstract»

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  • Stability conditions for systems with parametric uncertainties and nonlinear feedback

    Publication Year: 1994, Page(s):423 - 426
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The purpose of this paper is to use the passivity theorem to derive new stability conditions for a class of systems that consist of a linear subsystem with parametric uncertainty and nonlinear feedback. To address the inherent conservativism in applying the passivity theorem, causal multipliers are introduced into the analysis and it is shown that a Popov-like stability condition results. The stab... View full abstract»

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  • Parallel modeling and structure of nonlinear Volterra discrete systems

    Publication Year: 1994, Page(s):359 - 371
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (916 KB)

    A parallel modeling of the nonlinear finite extent Volterra discrete systems, which exploits the inherent symmetries and ensures fast implementation and design with the minimum computational and hardware cost, is presented. The parallel realization model is based on the successive decomposition of the kth order Volterra kernel in terms of lower order kernels, which are ordered in sequential nested... View full abstract»

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  • Analog circuit for solving assignment problems

    Publication Year: 1994, Page(s):426 - 429
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    A novel analog electronic circuit for solving assignment problems is presented. Total length of wiring in the proposed circuit amounts to at most O(n2) with n being the number of variables in contrast to O(n4) required for previously developed circuits based on the Hopfield neural networks. Moreover, its power dissipation is extremely small by virtue of subthreshold operation... View full abstract»

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  • Clock distribution in general VLSI circuits

    Publication Year: 1994, Page(s):395 - 404
    Cited by:  Papers (20)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (908 KB)

    Minimization of clock skew in VLSI circuits to within a tolerable range is important for dependable operation of any digital system. Moreover, excessive delay through a clock distribution network can significantly degrade the performance of the digital system. Differences in path lengths and active elements of a clock distribution network are largely responsible for clock skew while excessive dela... View full abstract»

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  • General structures for classification

    Publication Year: 1994, Page(s):372 - 376
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The problem of classifying signals is of interest in several application areas. Typically, we are given a finite number m of pairwise disjoint sets C1,…,Cm of signals, and we would like to synthesize a system that maps the elements of each Cj into a real number aj, such that the numbers a1 ,…,am are distinct. The main... View full abstract»

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  • Temperature stable voltage controlled current source

    Publication Year: 1994, Page(s):405 - 411
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    This paper proposes a complementary bipolar junction transistor circuit that supplies a nominally temperature invariant output current whose value is linearly related to a user defined static control voltage. The circuit developed herein is a true current source, as opposed to a current sink. It effectively functions as a static transconductor in that the controlling voltage is not limited to smal... View full abstract»

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  • Qualitative analysis of dynamical systems determined by differential inequalities with applications to robust stability

    Publication Year: 1994, Page(s):377 - 386
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB)

    In this paper we develop a Lyapunov stability theory for finite dimensional continuous-time dynamical systems described by a system of first-order ordinary differential inequalities. We utilize this theory to establish sufficient robust stability criteria for a large class of finite dimensional, continuous-time dynamical systems described by systems of ordinary differential equations. We demonstra... View full abstract»

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  • Some circuit design techniques using two cross-coupled, emitter-coupled pairs

    Publication Year: 1994, Page(s):411 - 423
    Cited by:  Papers (10)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    A circuit structure having two cross-coupled, emitter-coupled pairs is proposed as a fundamental analog function element for multiplying two electrical input quantities; the input voltage difference and the tail current difference. The simplest form is well-known as “the Gilbert multiplier cell.” In this circuit, the tail current difference is the differential output current of an emit... View full abstract»

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  • Design methodology for analog monolithic circuits

    Publication Year: 1994, Page(s):387 - 394
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    This contribution describes an approach to design methodology for analog monolithic circuits. The underlying philosophy relies on use of three description domains-functional, structural, and geometrical-and two design tasks-synthesis and analysis. Based on this, the basic design path is described and several design styles are demonstrated. Finally, appropriate CAD and related issues are discussed View full abstract»

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