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

Issue 10 • Date Oct 1992

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Displaying Results 1 - 12 of 12
  • 1/f noise generator using logarithmic and antilogarithmic amplifiers

    Publication Year: 1992 , Page(s): 851 - 853
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (208 KB)  

    A simple switched-capacitor circuit that generates 1/f δ noise is presented. The circuit realizes a discrete nonlinear one-dimensional map, that generates intermittent chaos with the 1/fδ power spectrum. An integrated circuit with a couple of logarithmic and antilogarithmic amplifiers is used to realize a nonlinear term xZ in ... View full abstract»

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  • The synthesis of circuits with a specified natural frequency given a set of linear devices

    Publication Year: 1992 , Page(s): 785 - 790
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (428 KB)  

    A circuit composed of elements taken from a range of linear devices has a set of possible natural frequencies. Two techniques for synthesizing circuits with any permitted natural frequency within the possible range are given. The first technique uses six of each device type, ideal transformers, and ideal wire. The second requires only two devices plus ideal transformers and ideal wire. Conditions ... View full abstract»

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  • Discrete-time nonlinear system stability

    Publication Year: 1992 , Page(s): 834 - 840
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (600 KB)  

    In contrast to BIBO stability for linear systems, nonlinear systems require specific restrictions on the input as well as the initial conditions. It is proved that nontrivial restrictions exist. A constructive method for finding the input and state-space restrictions that guarantee stable operation of nonlinear systems is developed View full abstract»

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  • Sliding mode control reduces audiosusceptibility and load perturbation in the Cuk converter

    Publication Year: 1992 , Page(s): 847 - 849
    Cited by:  Papers (20)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (220 KB)  

    Results of analysis and simulation of the sliding-mode control of a Cuk converter are presented. To control the output voltage, the converter dynamics are forced to slide over the surface corresponding to the constant input current. After the equivalent control is obtained, the coordinates of the equilibrium points are derived. Perturbation effects due to disturbances in the load or in the input v... View full abstract»

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  • Asymptotic stability of discrete-time systems with saturation nonlinearities with applications to digital filters

    Publication Year: 1992 , Page(s): 798 - 807
    Cited by:  Papers (40)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (804 KB)  

    New results for an established for the global asymptotic stability of the equilibrium x=0 of nth order discrete-time systems with state saturations, x(k+1)=sat[Ax(k)], utilizing a class of positive definite and radially unbounded Lyapunov functions, v . When v is a quadratic form, necessary and sufficient conditions are obtain... View full abstract»

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  • On solving the equation Ax=b with more variables than equations

    Publication Year: 1992 , Page(s): 833 - 834
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (160 KB)  

    A recently derived mathematical tool is applied directly to solving Ax=b with more variables than equations. This problem arises in the application of interval analysis to circuit design. An arbitrary number of the variables are chosen as parameters, and the complete zero set in the remaining variables multidimensional plane is explicitly determined View full abstract»

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  • BiCMOS current buffer-rectifier

    Publication Year: 1992 , Page(s): 849 - 851
    Cited by:  Papers (4)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (276 KB)  

    A BiCMOS current buffer with positive and negative precision rectifying outputs as well as a nonrectifying output is presented. It has low voltage supply requirements and good high-frequency performance and can be used as a building block of linear and nonlinear current-mode circuits. Experimental results of a test chip that verify the operation of the circuit are presented View full abstract»

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  • Windows of stability in control chaos

    Publication Year: 1992 , Page(s): 808 - 819
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (980 KB)  

    A three-parameter piecewise-linear difference model of a pulse-width-modulated feedback system is analyzed. Its dynamics are described for many parameter regimes, concentrating on the features that will be observable in real systems. In particular, explicit formulas are given for the (distinct) domains of existence of an infinite number of stable periodic solutions (of every period). Almost all in... View full abstract»

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  • Experimental confirmation of the lady's shoe attractor

    Publication Year: 1992 , Page(s): 844 - 846
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (212 KB)  

    Experimental results with a real circuit that realizes the chaotic lady's shoe attractor with a two-cell cellular neural network (CNN) are reported. The experiments show very interesting bifurcation phenomena, and in a certain parameter region the circuit becomes chaotic according to the online measured Poincare map and power spectrum, which confirms the existence of the lady's shoe attractor disc... View full abstract»

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  • A new formulation of the quadratic assignment problem on r-dimensional grid

    Publication Year: 1992 , Page(s): 791 - 797
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (432 KB)  

    It is shown that the quadratic assignment problem defined on the r-dimensional grid can be formalized using polynomial equations. Consequently, the problem can be classified into subgroups of relaxed problems according to the degree of the polynomial equations. Since the behavior of the solution is almost determined by a few polynomial equations with rather low degree, and it is generally... View full abstract»

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  • Stabilizing polynomials by making their higher-order coefficients sufficiently small

    Publication Year: 1992 , Page(s): 840 - 844
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (396 KB)  

    Given a polynomial of arbitrary order with positive coefficients, it is shown that the zeros of the polynomial can always be made to lie within the open left half-plane by multiplying each coefficient by an appropriate power of ε>0 and then letting ε become sufficiently small. This result can be applied to dynamic systems whose models may include small parasitic elements, and it can h... View full abstract»

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  • How to identify unstable DC operating points

    Publication Year: 1992 , Page(s): 820 - 832
    Cited by:  Papers (40)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1068 KB)  

    The stability of operating points that satisfy the circuit's DC operations but are nonetheless unobservable operating points is examined in a rigorous way. Two classes of DC operating points, unstable and potentially stable, are defined, and simple criteria, based only on the circuit's DC equations, that can classify a given operating point's stability are given. It is also shown that it suffices ... View full abstract»

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