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

Issue 3 • Date March 1996

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Displaying Results 1 - 13 of 13
  • Comments on "On limit cycles and the describing function method in periodically switched circuits"

    Publication Year: 1996, Page(s):250 - 252
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (323 KB)

    For the original article see IEEE Trans. Circuits Syst., vol. 40, no. 9, p.564-72 (1993). In the aforementioned paper by Sanders it is claimed that a justification for the describing function method is given. Here the commenter observes that this claim is unwarranted, and shows also that earlier results in the literature answer some closely related questions concerning the type of problem addresse... View full abstract»

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  • Chaotic behavior in super regenerative detectors

    Publication Year: 1996, Page(s):169 - 176
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    In this paper the super regenerative detector, as proposed by Armstrong in 1922, is investigated. We show that in a simplified model the current in the circuit behaves chaotically during a small period in time after which the circuit becomes an oscillator. Armstrong was not aware of the circuits' chaotic behavior, but reported strange irregular start-ups of the oscillator. Chaotic behavior of the ... View full abstract»

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  • On the validity of solutions and equilibrium points in a nonlinear network

    Publication Year: 1996, Page(s):233 - 235
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    For constrained differential equations arising in a specific nonlinear network, the inconsistency between two seemingly equivalent unconstrained representations has been long debated in the literature. One of the representations has nonunique solutions which violate the network constraints. Using new analytical tools, this brief proves that the two representations are not equivalent. Also the &ldq... View full abstract»

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  • Switching time bifurcations in a thyristor controlled reactor

    Publication Year: 1996, Page(s):209 - 218
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (988 KB)

    Thyristor controlled reactors are high power switching circuits used for static VAR control and the emerging technology of flexible AC transmission. The static VAR control circuit considered in the paper is a nonlinear periodically operated RLC circuit with a sinusoidal source and ideal thyristors with equidistant firing pulses. This paper describes new instabilities in the circuit in which thyris... View full abstract»

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  • Stability analysis of systems with partial state saturation nonlinearities

    Publication Year: 1996, Page(s):230 - 232
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    Sufficient conditions for the global asymptotic stability of the equilibrium xe=0 of discrete-time dynamical systems which have saturation nonlinearities on part of the states are established. We utilize a class of positive definite and radially unbounded Lyapunov functions in establishing our results. When using quadratic form Lyapunov functions, our results involve necessary and suffi... View full abstract»

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  • An accurate time domain interconnect model of transmission line networks

    Publication Year: 1996, Page(s):200 - 208
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    In this paper, we present a new time domain model of interconnects modeled as transmission line networks. Each element of the characteristics of a transmission line is modeled by a principal part and a remainder. The principal part consists of an impulse and an exponential function, whose Laplace transform matches the original function at infinity frequency with order 1 and at zero frequency with ... View full abstract»

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  • Formation of narrow pulses in a nonlinear lossy LC ladder network

    Publication Year: 1996, Page(s):243 - 245
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    We have analyzed the propagation of soliton in a nonlinear lossy LC ladder network by using a novel method called the Fourier Series Analysis Technique. Based on the measured C-V characteristic of the nonlinear capacitor used, we obtained a Korteweg-deVries (KdV) equation with a loss term. Experimental work has been carried out to investigate the effect of applying a DC bias voltage across the non... View full abstract»

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  • Transient analysis of diode switching circuits including charge storage effect

    Publication Year: 1996, Page(s):177 - 190
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    An efficient method for the transient simulation of diode switching circuits using the diode characteristic model, which takes into account the diode charge storage effect, is presented. The diode characteristic model is derived for a step-junction diode under the assumption of low-level injection. Unlike Linvill's multisection (physical) model that requires many lumped circuit elements for the an... View full abstract»

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  • Analysis of switching regulators by phase portrait technique

    Publication Year: 1996, Page(s):235 - 239
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The phase portrait technique is used to analyze transient and steady-state operation of switching regulators. The regulator model and analysis procedure are established, treatment of circuit nonlinearities, its time varying nature and feedback configuration is included. The proposed technique is applied to the analysis of buck converter operation. The benefits of analysis are discussed in view of ... View full abstract»

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  • Criteria of asymptotic stability of differential inclusions and periodic motions of time-varying nonlinear control systems

    Publication Year: 1996, Page(s):219 - 229
    Cited by:  Papers (50)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    New constructive criteria of asymptotic stability of selector-linear differential inclusions are established. The well-known absolute stability problem is also considered as a particular case of the above problem. Asymptotically stable inclusions are very similar in properties to linear stable time-invariant systems. This similarity concerns the wide range of dynamic properties. In particular, asy... View full abstract»

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  • On the experimental methods to characterize the opamp response: a critical view

    Publication Year: 1996, Page(s):245 - 249
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    The authors review critically the most popular methods for the frequency characterisation of operational amplifiers. The common point of all them is their simplicity, in the sense that they make use of simple stages, are computationally simple and do not require sophisticated instrumentation. The weaknesses and strengths of the different methods are pointed out and demonstrated via Spice simulatio... View full abstract»

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  • A robust and fast convergent interval analysis method for the calculation of internally controlled switching instants

    Publication Year: 1996, Page(s):191 - 199
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (764 KB)

    An interval analysis-based method for the root-finding of nonmonotonic polynomials is presented in this paper. It has been developed for numerical time-domain analysis of switched nonlinear networks, where internally controlled switching instants must be calculated as zeros of strongly nonmonotonic nonlinear functions. The method in based on an interval extension of Newton's operator resulting fro... View full abstract»

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  • On causality and anticausality of cascaded discrete-time systems

    Publication Year: 1996, Page(s):240 - 242
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    This brief treats a fundamental question: when two linear time-invariant, finite-dimensional systems, causal or noncausal, are cascaded, what can be said about the causality properties of the overall system? We give conditions under which the cascaded system is causal or anticausal; these conditions are related to Sylvester equations obtained from state-space data of the systems. Both discrete- an... View full abstract»

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