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

Issue 9 • Date Sep 1996

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Displaying Results 1 - 18 of 18
  • A new approach for the design of digital integrators

    Publication Year: 1996 , Page(s): 785 - 791
    Cited by:  Papers (25)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (432 KB)  

    A new method is proposed for the design of digital integrators. The new method is based upon the formulation of an appropriate linear programming problem which assures a satisfactory minimax approximation error for the magnitude response in a predefined frequency range. In comparison with existing methods the new design approach constructs a novel class of digital integrators by optimal determinin... View full abstract»

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  • Analysis and design of a current-driven two-inductor ZCS low diD/dt full-wave rectifier

    Publication Year: 1996 , Page(s): 745 - 759
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1164 KB)  

    An analysis and experimental verification of a current-driven two-inductor zero-current-switching (ZCS) low diD/dt full-wave rectifier are given. The design equations are derived using the time-domain analysis and Fourier series technique. The rectifier operates as a full-wave rectifier with two diodes and a one-secondary winding transformer overcoming the limitations of class D current... View full abstract»

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  • Optimal reduced-order models for unstable and nonminimum-phase systems

    Publication Year: 1996 , Page(s): 800 - 805
    Cited by:  Papers (8)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (572 KB)  

    A technique is presented for optimally approximating an unstable and/or nonminimum-phase high-order transfer function by a low-order one which has the same numbers of right half-plane (RHP) poles and zeros as the original system. It is based on representing the denominator and numerator polynomials of a reduced-order transfer function in products of quadratic factors with/without a linear factor. ... View full abstract»

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  • Factorization of high degree polynomials-a numerical solution

    Publication Year: 1996 , Page(s): 792 - 794
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (276 KB)  

    An algorithm based on the least-squares solution for overdetermined linear equations is presented. It is shown that a general polynomial of 2M° can almost always be factored into two halves each with a degree M. Polynomials with odd degrees can be factored by introducing one extra zero root View full abstract»

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  • Secure communication via chaotic parameter modulation

    Publication Year: 1996 , Page(s): 817 - 819
    Cited by:  Papers (97)  |  Patents (11)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (184 KB)  

    In this letter, we extend chaotic switching to general chaotic parameter modulation. By using adaptive controller, synchronization between transmitter and receiver is maintained and message signal is recovered. Computer simulation results are given View full abstract»

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  • A continuously variable tuning technique for switched capacitor filters

    Publication Year: 1996 , Page(s): 798 - 800
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (320 KB)  

    A new tuning technique for SC filters is described which allows separate, continuous tuning of centre frequency and Q. Feedforward control is used with this arrangement and so the complexities and hence cost of feedback control are largely avoided. Measured results from a discrete component model are provided View full abstract»

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  • Risk-sensitive maximum likelihood sequence estimation

    Publication Year: 1996 , Page(s): 805 - 810
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (552 KB)  

    In this brief, we consider risk-sensitive Maximum Likelihood sequence estimation for hidden Markov models with finite-discrete states. An algorithm is proposed which is essentially a risk-sensitive variation of the Viterbi algorithm. Simulation studies show that the risk-sensitive algorithm is more robust to uncertainties in the transition probability matrix of the Markov chain. Similar estimation... View full abstract»

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  • Globally optimal floorplanning for a layout problem

    Publication Year: 1996 , Page(s): 713 - 720
    Cited by:  Papers (21)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (760 KB)  

    In this paper, the floorplanning problem for a layout problem is formulated as a global optimization problem. The area of each building block is assumed to be fixed. However, its width and height are allowed to vary subject to aspect ratio constraints. Also, a block may be arbitrarily oriented in parallel to the xy orthogonal axes, subject to partition constraints with associated adjacency relatio... View full abstract»

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  • Energy recovery circuits using reversible and partially reversible logic

    Publication Year: 1996 , Page(s): 769 - 778
    Cited by:  Papers (18)  |  Patents (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (948 KB)  

    This paper presents a new family of logic gates for low energy computing using pulsed power CMOS logic. The logic gates use the principles of adiabatic-switching and results show that in typical cases 90% of the energy can be recovered with operating frequency around 1 MHz. Constant capacitance condition is enforced in our designs so that signals' energy can be efficiently recycled in the chip. We... View full abstract»

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  • A rational formulation of thermal circuit models for electrothermal simulation. I. Finite element method [power electronic systems]

    Publication Year: 1996 , Page(s): 721 - 732
    Cited by:  Papers (43)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (872 KB)  

    As the size of the semiconductor devices is getting smaller with advanced technology, self-heating effects in power semiconductor devices are becoming important. An electrothermal simulation of complete power electronic systems that include Si chips, thermal packages, and heat sinks is essential for an accurate analysis of the behavior of these systems. This paper presents a rational approach to c... View full abstract»

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  • Coprime factorizations of parallel, cascade, feedback interconnections

    Publication Year: 1996 , Page(s): 813 - 814
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (164 KB)  

    Doubly coprime factorizations of the transfer-functions of parallel, cascade, and feedback system interconnections are derived algebraically, extending the results of previous work on parallel interconnections. The factors of these doubly coprime representations derived here are important in characterizing all stabilizing controllers for these interconnections View full abstract»

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  • Limitation of delayed feedback control in nonlinear discrete-time systems

    Publication Year: 1996 , Page(s): 815 - 816
    Cited by:  Papers (103)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (176 KB)  

    Recently, Pyragas [1993] proposed a control method called delayed feedback control to stabilize unstable periodic orbits in nonlinear continuous-time systems. In this letter, we consider delayed state-feedback control in discrete-time systems. We show that a fixed point can not be stabilized by the delayed state-feedback control if the linearized system around the fixed point has an odd number of ... View full abstract»

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  • A precision control circuit for variable-gain amplifiers

    Publication Year: 1996 , Page(s): 779 - 782
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (348 KB)  

    The author describes a circuit that precisely controls the gain of one or more single-ended amplifiers by means of a corresponding number of Gilbert quads. The circuit employs a configuration consisting of a differential pair with two negative feedback loops and is used in conjunction with a precision potentiometer to generate a DC gain-control voltage as a function of its setting. The gain-contro... View full abstract»

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  • Stability analysis of Hill systems

    Publication Year: 1996 , Page(s): 794 - 797
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (300 KB)  

    The author shows that the (α, β)-plane stability boundaries of the Hill equation, x¨+[α+βf(t)]x=0, f(t)=f(t+T), (which governs the behavior of many physical and engineering systems) can be obtained in a simple fashion by first evaluating a series of constants that depend only on f(t). Definite integral expressions of order k, k=1,2,..., are given that allow one to evaluat... View full abstract»

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  • Buck converter with a new driving circuit in a TV power system

    Publication Year: 1996 , Page(s): 811 - 813
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (276 KB)  

    In this letter, a new buck converter of a TV power system is presented. First, we devised a driving circuit for an emitter-coupled type buck converter, by which it is possible to reduce the material cost of transformers and voltage stress of power device. Second, we adopted a hybrid oscillation technique. After self-oscillating mode feeds initial standby power, main power is provided by a forced o... View full abstract»

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  • 1.5 V full-swing BiCMOS dynamic logic circuits

    Publication Year: 1996 , Page(s): 760 - 768
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (728 KB)  

    This paper presents the design of BiCMOS dynamic logic circuits that are capable of full-swing operation from low supply voltages down to 1.5 V. Basic full-swing low-voltage BiCMOS cells are introduced. These include emitter-follower complementary n-type cell, quasi-complementary n-type cell and a p-type cell based on the transiently saturated full-swing technique. The propagation delay, power con... View full abstract»

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  • Linear conjugacy of vector fields in Lur'e form

    Publication Year: 1996 , Page(s): 782 - 785
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (368 KB)  

    We show that the behavior of a class of n-dimensional systems having vector fields in Lur'e form is uniquely determined by their eigenvalue patterns. The construction of a canonical system that retains almost all features of vector fields in Lur'e form having the same eigenvalue pattern is given View full abstract»

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  • A rational formulation of thermal circuit models for electrothermal simulation. II. Model reduction techniques [power electronic systems]

    Publication Year: 1996 , Page(s): 733 - 744
    Cited by:  Papers (19)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (912 KB)  

    For pt. I see ibid., vol. 43, no. 9, p. 721-32 (1996). To increase the efficiency of the electrothermal simulation of power electronic circuits and devices, model reduction techniques are applied to develop reduced thermal circuit models of Si chips, thermal packages, and heat sinks. Both the Modal Superposition method and a Component Mode Synthesis method are presented together with a model error... View full abstract»

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