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IEEE Transactions on Circuits and Systems II: Express Briefs

Issue 10 • Oct. 2004

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Displaying Results 1 - 21 of 21
  • Table of contents

    Publication Year: 2004, Page(s): c1
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  • IEEE Transactions on Circuits and Systems—II: Express Briefs publication information

    Publication Year: 2004, Page(s): c2
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  • Breaking two secure communication systems based on chaotic masking

    Publication Year: 2004, Page(s):505 - 506
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB) | HTML iconHTML

    This paper describes the security weakness of two generalized nonlinear state-space observers-based approaches for both chaos synchronization and secure communication, using chaotic masking and chaotic modulation of a Lorenz system. We show that the security is compromised without any knowledge of the chaotic system parameter values and even without knowing the transmitter structure. View full abstract»

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  • A digital blind background capacitor mismatch calibration technique for pipelined ADC

    Publication Year: 2004, Page(s):507 - 510
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB) | HTML iconHTML

    A new digital background calibration technique to compensate for the capacitor mismatch in pipelined analog-to-digital converter (ADC) is presented. A digital signal from the ADC output is constructed so as to transform the capacitor mismatch to gain error. A simple modification to the conventional multiplying digital-to-analog converter (MDAC) allows the ADC to toggle between different configurat... View full abstract»

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  • The importance of choosing attractors for optimizing chaotic communications

    Publication Year: 2004, Page(s):511 - 516
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    In this brief, we consider methods to improve the performance of chaotic communication schemes. We study a system using a receiver which explicitly includes the presence of noise in the channel. We show how the choice of chaotic dynamical system generating the transmitted signal is crucial. We observe a large variation in bit error rate performance of the system as parameters in the maps are chang... View full abstract»

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  • Parasitic modeling and analysis for a 1-Gb/s CMOS laser driver

    Publication Year: 2004, Page(s):517 - 522
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB) | HTML iconHTML

    A differential laser driver (LD) operating at 1 Gb/s has been designed and tested using NSC 0.35-μm CMOS technology. The effect of simultaneous switching noise caused by packaging parasitic was addressed and the parasitic model was developed to predict the exact behavior of circuit performance. With the developed parasitic model, the LD simulation results showed the degradation of the output si... View full abstract»

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  • Design of phase-controlled class E inverter with asymmetric circuit configuration

    Publication Year: 2004, Page(s):523 - 528
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB) | HTML iconHTML

    A design of phase-controlled class E inverter with asymmetric circuit configuration is presented. By using the presented design method, it is possible to derive the design values, which let the inverters achieve zero-voltage switching continuously in the control range, are derived. By carrying out circuit experiments, it is verified that the experimental results agree with numerical predictions qu... View full abstract»

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  • Mixed p-z approach for time-domain analysis of voltage source inverters with periodic pulsewidth modulation

    Publication Year: 2004, Page(s):529 - 536
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB) | HTML iconHTML

    A new method for time-domain analysis of power converters with periodic pulsewidth modulation (PWM) is developed. The method is based on a mixed p-z description of linear periodic time-varying system. The basic of the model is explained in DC-DC converters with periodical PWM. Next, two applications of the model are shown. First, the model was used for the analysis of three-phase voltage source in... View full abstract»

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  • Time-interleaved sigma-delta modulator using output prediction scheme

    Publication Year: 2004, Page(s):537 - 541
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB) | HTML iconHTML

    A time-interleaved sigma-delta modulator using the output prediction scheme is proposed. This approach uses only one integrator channel along with incomplete integrator output terms to eliminate the quantizer domino which is a key limit for practical circuit implementation of conventional time-interleaved sigma-delta modulators. In addition, channel mismatch effects due to mismatch within multiple... View full abstract»

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  • OTA linearity enhancement technique for high frequency applications with IM3 below -65 dB

    Publication Year: 2004, Page(s):542 - 548
    Cited by:  Papers (52)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB) | HTML iconHTML

    A technique to enhance the linearity of continuous-time operational transconductance amplifiers (OTA)-C filters working at high frequencies is proposed. Each OTA consumes 10.5 mW and the transconductance can be tuned from 70 to 160 μA/V while the IM3 remains below -70 dB up to 50 MHz for a 1.3-Vpp differential input. For a 20-MHz low-pass second-order filter implementation, the measu... View full abstract»

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  • A self-driven active clamp forward converter using the auxiliary winding of the power transformer

    Publication Year: 2004, Page(s):549 - 551
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB) | HTML iconHTML

    This study proposes a new self-driven active clamp forward converter eliminating the extra drive circuit for the active clamp switch. The converter used the auxiliary winding of the power transformer to drive the active clamp switch and a simple RC circuit to get the dead time between the two switches. The operation principle was presented and experimental results were used to verify theoretical p... View full abstract»

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  • On the realization of circuit-independent nonautonomous pulse-excited chaotic oscillator circuits

    Publication Year: 2004, Page(s):552 - 556
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB) | HTML iconHTML

    The aim of this paper is to present a simple circuit design method for realizing a nonautonomous chaotic oscillator given a second-order sinusoidal oscillator with two capacitors. The proposed method relies on applying a periodic pulse train, as an exciting source, and the addition of a signum-type nonlinear transconductor to the given sinusoidal oscillator. Experimental results of designed circui... View full abstract»

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  • Partial identification of Lorenz system and its application to key space reduction of chaotic cryptosystems

    Publication Year: 2004, Page(s):557 - 560
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB) | HTML iconHTML

    In this brief, we present a novel adaptive method to synchronize with a partially known Lorenz chaotic system. The method exploits a novel expression of the Lorenz system to design a parameter identifier for its unknown parameter. We also apply the result to investigate the security of a cryptosystem previously proposed in the literature and show that the method can be used to eavesdrop on an encr... View full abstract»

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  • Position-dependent control of numerical integration in circuit simulation

    Publication Year: 2004, Page(s):561 - 565
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB) | HTML iconHTML

    In circuit simulators based on nodal analysis techniques, one numerical integration method is typically used to solve all differential equations. The properties of this method determine to a large extent the types of waveforms which can be simulated accurately. In this work, a concept for the position dependent control of numerical integration to simulate waveforms with very diverse characteristic... View full abstract»

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  • Design and evaluation of current-mode image sensors in CMOS-technology

    Publication Year: 2004, Page(s):566 - 570
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB) | HTML iconHTML

    Three different current-mode-output CMOS image sensor structures comprising of a pixel cell and an appropriate readout circuit have been analyzed and compared with regard to their noise behavior, fixed-pattern noise (FPN), and the dynamic range. First, a standard integrating pixel cell with a readout circuit containing a voltage-to-current converter is proposed. Second, a pixel cell based on a swi... View full abstract»

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  • A regulated body-driven CMOS current mirror for low-voltage applications

    Publication Year: 2004, Page(s):571 - 577
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB) | HTML iconHTML

    A CMOS current mirror (CM) based on the body-driven technique and active feedback scheme is presented. The proposed CM is immune to the threshold voltage limitation and offers much higher accuracy over wider current operating range than other body-driven CMs. The complete analysis of the input-output characteristics, system dc current transfer error, frequency, and noise performance is provided. B... View full abstract»

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  • 2005 IEEE International Symposium on Circuits and Systems (ISCAS 2005)

    Publication Year: 2004, Page(s): 578
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  • Special issue on biomedical circuits and systems: a new wave of technology

    Publication Year: 2004, Page(s): 579
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  • Quality without compromise [advertisement]

    Publication Year: 2004, Page(s): 580
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  • IEEE Circuits and Systems Society Information

    Publication Year: 2004, Page(s): c3
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  • IEEE Transactions on Circuits and Systems—II: Express Briefs Information for authors

    Publication Year: 2004, 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