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

Issue 9 • Date Sep 1997

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Displaying Results 1 - 11 of 11
  • Performance estimation of complex MOS gates

    Publication Year: 1997, Page(s):785 - 795
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    In this paper, a new efficient two-step reduction technique is proposed to estimate the performance of complex gates. A complex gate is first mapped to an equivalent NAND gate form and then the NAND gate is mapped to an inverter macromodel. Accurate reduction techniques for series-connected transistors precisely model effective transconductance, the channel length modulation effect, input terminal... View full abstract»

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  • Low-voltage low-power CMOS current conveyors

    Publication Year: 1997, Page(s):828 - 835
    Cited by:  Papers (65)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    New CMOS rail to rail second generation current conveyor circuits are proposed. First a class A current conveyor circuit which operates from a single supply of 1.5 V with a rail to rail voltage swing capability is given. The circuit is then modified to work as a class AB while maintaining the rail to rail swing capability. The class AB circuit works from supply voltages down to +1.1 V with standby... View full abstract»

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  • Generalization of MRC circuits and its application

    Publication Year: 1997, Page(s):777 - 784
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    This paper proposes a generalization of MOS resistive circuits (MRCs). The proposed circuit has m inputs and n outputs while the conventional one has two inputs and two outputs. Applications of this generalized-version MRC to variable-gain amplifiers, integrators, and filters are presented to demonstrate its versatility as well as flexibility, HSPICE simulations using 2 μm process parameters al... View full abstract»

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  • Approximating delay elements by feedback

    Publication Year: 1997, Page(s):824 - 828
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    A procedure for obtaining a proper rational approximant of the transfer function of a delayer is suggested. In particular, the step response of the unity-feedback system with the delayer in the direct path is first approximated by truncating the Fourier series expansion of its periodic component, and then the corresponding direct-path rational transfer function is derived, thus arriving at a stabl... View full abstract»

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  • Binary output of cellular neural networks with smooth activation

    Publication Year: 1997, Page(s):821 - 824
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    An important property of cellular neural networks (CNN's) is the binary output property, that, when the self-feedback is greater than one, the final activations are ±1. This brief considers the generalization of this property to networks with sigmoidal output functions. It is shown that in this case the property cannot be stated without reference to the cross feedback, and conditions are fo... View full abstract»

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  • Lyapunov functions for multimachine power systems with dynamic loads

    Publication Year: 1997, Page(s):796 - 812
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    This paper develops Lyapunov functions for power systems which have dynamic reactive power loads. These functions are extensions of earlier Lyapunov functions derived for structure preserving power system models having static loads. In order to obtain strict Lyapunov functions, the transient response of the dynamic load must have a logarithmic dependence on voltage. A Lyapunov function is initiall... View full abstract»

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  • A new approach to design cellular neural networks for associative memories

    Publication Year: 1997, Page(s):835 - 838
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    In this brief, a synthesis procedure of cellular neural networks for associative memories is presented, The proposed method, by assuring the global asymptotic stability of the equilibrium point, generates networks where the input data are fed via external inputs rather than initial conditions. This new approach enables to design both heteroassociative and autoassociative memories and reveals parti... View full abstract»

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  • Subspace-based techniques for blind separation of convolutive mixtures with temporally correlated sources

    Publication Year: 1997, Page(s):813 - 820
    Cited by:  Papers (107)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    This contribution addresses the blind identification of multiple input multiple output linear finite impulse response systems having a number of inputs less than the number of outputs. Recent publications have proposed an efficient second-order identification method in the single input multiple output case. Based on a subspace analysis, it allows a perfect recovery of the system parameters and exc... View full abstract»

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  • Complex digital networks: a sensitivity analysis based on the Wirtinger calculus

    Publication Year: 1997, Page(s):839 - 843
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    Several different approaches for analyzing the coefficient sensitivity of digital networks containing real coefficients are known. In this brief, one of these approaches-the analysis based on the calculation of partial derivatives with respect to the coefficients-is extended to digital networks containing complex coefficients. The main mathematical tool needed for this extension-the so-called Wirt... View full abstract»

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  • A Hamiltonian formulation for complete nonlinear RLC-networks

    Publication Year: 1997, Page(s):843 - 846
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    In this brief a new Lagrangian and Hamiltonian formulation for complete nonlinear RLC-networks is given. The formalism makes use of the explicit construction of Brayton and Moser's “mixed potential function” (1964) and therefore explicitly reveals the close connection between the Brayton-Moser equations and Hamiltonian formalisms for dissipative systems. On the basis of our Hamiltonian... View full abstract»

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  • Coexisting attractors, chaotic saddles, and fractal basins in a power electronic circuit

    Publication Year: 1997, Page(s):847 - 849
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (80 KB)

    We report the observation of coexisting attractors with fractal basin boundaries in the voltage mode controlled buck converter. Long chaotic transients resulting from chaotic saddles are observed for a large range of parameter values. These phenomena may have serious technological implications View full abstract»

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