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IEEE Transactions on Circuits and Systems II: Express Briefs

Issue 5 • May 2005

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Displaying Results 1 - 17 of 17
  • Table of contents

    Publication Year: 2005, Page(s): c1
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  • IEEE Transactions on Circuits and Systems—II: Express Briefs publication information

    Publication Year: 2005, Page(s): c2
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  • A portable digitally controlled oscillator using novel varactors

    Publication Year: 2005, Page(s):233 - 237
    Cited by:  Papers (59)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB) | HTML iconHTML

    This work presents a portable digitally controlled oscillator (DCO) by using two-input NOR gates as a digitally controlled varactor (DCV) in fine-tuning delay cell design. This novel varactor uses the gate capacitance difference of NOR gates under different digital control inputs to establish a DCV. Thus proposed DCO can improve delay resolution 256 times better than a single buffer design. This s... View full abstract»

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  • A wavelet view of small-world networks

    Publication Year: 2005, Page(s):238 - 241
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB) | HTML iconHTML

    The human eye is a powerful tool to gain an understanding of the structure of small networks of tens of vertices. However, direct analysis by the eye is hopeless for a network of millions of vertices. The theory of wavelets provides a powerful microscopy to look at large complex networks to answer specific questions about their structure. Wavelet multiresolution representations of networks provide... View full abstract»

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  • Synthesis of reactance networks shaping a quasi-rectangular pulse

    Publication Year: 2005, Page(s):242 - 245
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB) | HTML iconHTML

    The brief describes synthesis of pulse-forming reactance networks with output response of quasi-rectangular shape. Three cases of input excitation are considered, namely, an impulse, a step, and a sinusoid. The derivative of network output response is approximated using half-periods of sine-squared function. The real and imaginary parts of the Laplace transform of this derivative are expanded in i... View full abstract»

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  • A low-Voltage 10-bit CMOS DAC in 0.01-mm2 die area

    Publication Year: 2005, Page(s):246 - 250
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB) | HTML iconHTML

    A low-voltage 10-bit digital-to-analog converter (DAC) for static/dc operation is fabricated in a standard 0.18-μm CMOS process. The DAC is optimized for large integrated circuit systems where possibly dozens of such DAC would be employed for the purpose of digitally controlled analog circuit calibration. The DAC occupies 110 μm×94 μm die area. A segmented R-2R architecture is used ... View full abstract»

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  • Stochastic stability analysis of fuzzy hopfield neural networks with time-varying delays

    Publication Year: 2005, Page(s):251 - 255
    Cited by:  Papers (180)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB) | HTML iconHTML

    The ordinary Takagi-Sugeno (TS) fuzzy models have provided an approach to represent complex nonlinear systems to a set of linear sub-models by using fuzzy sets and fuzzy reasoning. In this paper, stochastic fuzzy Hopfield neural networks with time-varying delays (SFVDHNNs) are studied. The model of SFVDHNN is first established as a modified TS fuzzy model in which the consequent parts are composed... View full abstract»

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  • A comparison of hardware implementations of the biorthogonal 9/7 DWT: convolution versus lifting

    Publication Year: 2005, Page(s):256 - 260
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB) | HTML iconHTML

    The filter bank approach for computing the discrete wavelet transform (DWT), which we call the convolution method, can employ either a nonpolyphase or polyphase structure. This work compares filter banks with an alternative polyphase structure for calculating the DWT-the lifting method. We look at the traditional lifting structure and a recently proposed "flipping" structure for implementing lifti... View full abstract»

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  • Active gate control of series connected IGBTs using positive current feedback technique

    Publication Year: 2005, Page(s):261 - 265
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB) | HTML iconHTML

    Controllable devices like insulated gate bipolar transistors (IGBTs) are very popular on account of their highly desirable features. This prompts their use in high-voltage applications. But high-voltage IGBT development is facing constraints and there is a requirement for series connection of these devices to enhance their voltage withstanding capability. The series connection of IGBTs, however, h... View full abstract»

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  • Gated-diode amplifiers

    Publication Year: 2005, Page(s):266 - 270
    Cited by:  Papers (17)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB) | HTML iconHTML

    This brief describes MOS amplifiers comprising a gated diode and a field-effect transistor. A gated diode is a two-terminal MOS device in which charge is stored when a voltage above the threshold voltage is applied between the gate and the source, and negligible charge is stored otherwise. The operation makes use of the nonlinear capacitance of the gated diode for voltage boosting, where voltage f... View full abstract»

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  • Equivalence and reduction of 2-D systems

    Publication Year: 2005, Page(s):271 - 275
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB) | HTML iconHTML

    Three definitions of equivalence in two-dimensional (2-D) systems theory are considered and certain connections between them made. The computational based definition suffers from the deficiency that it has the smallest equivalence classes, which therefore may not be sufficiently wide to contain reduced system forms. Despite this, the reduction to a first-order form of singular Roesser type is show... View full abstract»

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  • New linear-programming-based filter design

    Publication Year: 2005, Page(s):276 - 281
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB) | HTML iconHTML

    It is well known that the filter-design problem with mask constraints can be formulated as a semi-infinite program. There are two approaches toward the solution of this semi-infinite program. The first griding approach relaxes the semi-infinite constraint by refining it in the finite griding domain so it does not always guarantee global optimal and feasible solution. The second semi-definite progr... View full abstract»

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  • Synchronization in arrays of coupled nonlinear systems with delay and nonreciprocal time-varying coupling

    Publication Year: 2005, Page(s):282 - 286
    Cited by:  Papers (103)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB) | HTML iconHTML

    We study synchronization in an array of coupled nonlinear systems with delay and nonreciprocal time-varying coupling and present synchronization criteria which generalize previous synchronization results. We show that the array synchronizes when the nondelay coupling term is cooperative and large enough. Furthermore, we show that the synchronization criteria are related to several matrix quantitie... View full abstract»

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  • Special issue on advances on life science systems and applications

    Publication Year: 2005, Page(s): 287
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    Freely Available from IEEE
  • Celebrating the vitality of technology the Proceedings of the IEEE [advertisement]

    Publication Year: 2005, Page(s): 288
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  • IEEE Circuits and Systems Society Information

    Publication Year: 2005, Page(s): c3
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  • IEEE Transactions on Circuits and Systems—II: Express Briefs Information for authors

    Publication Year: 2005, Page(s): c4
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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