IEEE Transactions on Circuits and Systems II: Express Briefs

Issue 4 • April 2005

Filter Results

Displaying Results 1 - 16 of 16
  • Table of contents

    Publication Year: 2005, Page(s): c1
    Request permission for commercial reuse | |PDF file iconPDF (33 KB)
    Freely Available from IEEE
  • IEEE Transactions on Circuits and Systems—II: Express Briefs publication information

    Publication Year: 2005, Page(s): c2
    Request permission for commercial reuse | |PDF file iconPDF (36 KB)
    Freely Available from IEEE
  • Minimal positive realizations for a class of transfer functions

    Publication Year: 2005, Page(s):177 - 180
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (128 KB) | HTML iconHTML

    It is a standard result in linear-system theory that an nth-order rational transfer function of a single-input single-output system always admits a realization of order n. In some applications, however, one is restricted to realizations with nonnegative entries (i.e. a positive system), and it is known that this restriction may force the order N of realizations to be strictly larger than n. In thi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A unifying proof of global asymptotical stability of neural networks with delay

    Publication Year: 2005, Page(s):181 - 184
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (144 KB) | HTML iconHTML

    We present some new global stability results of neural networks with delay and show that these results generalize recently published stability results. In particular, several different stability conditions in the literature which were proved using different Lyapunov functionals are generalized and unified by proving them using the same Lyapunov functional. We also show that under certain condition... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A low-voltage CMOS switch with a novel clock boosting scheme

    Publication Year: 2005, Page(s):185 - 188
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (200 KB) | HTML iconHTML

    There is a strong demand for an input switch in switched-capacitor circuits, covering rail-to-rail signal swing when low power-supply voltages are used. This brief proposes a novel clock-boosting scheme. The generated clock voltages of this new circuit are applied to a regular CMOS transmission gate to implement a simple and robust sampling switch when the supply voltages are very low. In this new... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pseudobasin of attraction for combinatorial dynamical systems: theory and its application to combinatorial optimization

    Publication Year: 2005, Page(s):189 - 193
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (240 KB) | HTML iconHTML

    In this brief, a concept of a pseudobasin (a generalized concept of a basin of attraction) for a class of combinatorial dynamical system is introduced. A fairly comprehensive theory of its algebraic and topological structure is developed. A systematic method to solve a combinatorial optimization problem is also developed. Utilizing the theoretical results of pseudobasin, the convergence of the pro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • SC amplifier and SC integrator with an accurate gain of 2

    Publication Year: 2005, Page(s):194 - 198
    Cited by:  Papers (6)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (280 KB) | HTML iconHTML

    A fully differential switched-capacitor (SC) amplifier and integrator with an accurate gain of 2 are proposed. Both circuits are based on a novel capacitor mismatch compensation scheme which uses the same capacitor as the charge sampling and summing element. Therefore, the gain error which is linearly proportional to the capacitor mismatch in conventional SC circuits becomes proportional to the sq... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An improved ρDFIIt structure for digital filters with minimum roundoff noise

    Publication Year: 2005, Page(s):199 - 203
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (256 KB) | HTML iconHTML

    In this brief, a new efficient digital filter structure with minimum roundoff noise is derived. This structure can be block-diagrammed as the recently proposed direct-form II transposed (DFIIt) structure in ρ-operator, denoted as ρDFIIt, in which the first-order ρ operators are replaced with a set of second-order operators. The corresponding expression for the roundoff noise gain is ob... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Controlling a unified chaotic system to hyperchaotic

    Publication Year: 2005, Page(s):204 - 207
    Cited by:  Papers (82)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (840 KB) | HTML iconHTML

    This brief presents a simple technique using a sinusoidal parameter perturbation control input to drive a unified chaotic system to hyperchaotic. The original chaotic system is a three-dimensional autonomous system that has a broad spectrum of chaotic behaviors with the Lorenz and the Chen systems as two extremes of the spectrum. The control input is a simple sinusoidal function cos(ωt) with... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Distributed discrete-time systems with synchronization errors: models and stability

    Publication Year: 2005, Page(s):208 - 212
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (216 KB) | HTML iconHTML

    The problem addressed in this brief originates from the use of nonidentical clocks in distributed systems, i.e., clocks with slightly different frequencies. At first, we introduce an event driven state space model for asynchronous system equations. Then, we derive necessary and sufficient conditions for stability and show that unlike in the case of synchronous operations, the slightest mismatch in... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Stochastic noise Process enhancement of Hopfield neural networks

    Publication Year: 2005, Page(s):213 - 217
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (184 KB) | HTML iconHTML

    Hopfield neural networks (HNN) are a class of densely connected single-layer nonlinear networks of perceptrons. The network's energy function is defined through a learning procedure so that its minima coincide with states from a predefined set. However, because of the network's nonlinearity, a number of undesirable local energy minima emerge from the learning procedure. This has shown to significa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Semi-global stabilization of a class of uncertain nonlinear systems by linear output feedback

    Publication Year: 2005, Page(s):218 - 222
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (192 KB) | HTML iconHTML

    This brief deals with the problem of semi-global stabilization by output feedback for a class of uncertain nonlinear systems. Due to the presence of mismatched uncertainties and the lack of triangularity condition, the systems under consideration are not uniformly completely observable. In addition, the uncertain nonlinear dynamics of the systems are higher order, rather than linearly growing, in ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Noise gain expressions for low noise second-order digital filter structures

    Publication Year: 2005, Page(s):223 - 227
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (184 KB) | HTML iconHTML

    The quantization noise of a fixed-point digital filter is commonly expressed in terms of its noise gain, i.e., the factor by which the noise power q2/12 of a single quantizer is amplified to the output of the filter. In this brief, first a closed-form expression for the optimal second-order noise gain in terms of the coefficients of the numerator and denominator polynomials of the trans... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal filtering for multirate systems

    Publication Year: 2005, Page(s):228 - 232
    Cited by:  Papers (70)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (200 KB) | HTML iconHTML

    For a multirate system where the output sampling is slower than the input updating, this brief aims at designing filters for fast state estimation in the H2 and H∞ settings. Because of the multirate nature, linear matrix inequality solutions to the design problems involve a nonconvex constraint, which is numerically tackled by the product reduction algorithm. Finally, a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • IEEE Circuits and Systems Society Information

    Publication Year: 2005, Page(s): c3
    Request permission for commercial reuse | |PDF file iconPDF (35 KB) | HTML iconHTML
    Freely Available from IEEE
  • IEEE Transactions on Circuits and Systems—II: Express Briefs Information for authors

    Publication Year: 2005, Page(s): c4
    Request permission for commercial reuse | |PDF file iconPDF (36 KB)
    Freely Available from IEEE

Aims & Scope

Part I will now contain regular papers focusing on all matters related to fundamental theory, applications, analog and digital signal processing. Part II will report on the latest significant results across all of these topic areas.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief

Chi K. Michael Tse
Dept. of Electronic and Information Engineering
Hong Kong Polytechnic University
Hunghom, Hong Kong
cktse@ieee.org