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IEEE Transactions on Circuits and Systems II: Express Briefs

Issue 6 • June 2010

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Displaying Results 1 - 24 of 24
  • Table of contents

    Publication Year: 2010, Page(s):C1 - C4
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  • IEEE Transactions on Circuits and Systems—II: Express Briefs publication information

    Publication Year: 2010, Page(s): C2
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  • Micropower Data Converters: A Tutorial

    Publication Year: 2010, Page(s):405 - 410
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB) | HTML iconHTML

    In many applications, such as in battery-operated medical devices or in habitat monitoring sensor networks, special data converters are needed, which can operate on battery or even harvested power. The available power in these devices is very limited, often only a few tens of microwatts. This tutorial discusses some of the design options for such micropower digital-to-analog and analog-to-digital ... View full abstract»

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  • A CMOS Outphasing Power Amplifier With Integrated Single-Ended Chireix Combiner

    Publication Year: 2010, Page(s):411 - 415
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (493 KB) | HTML iconHTML

    This brief proposes an on-chip outphasing power amplifier that uses a single-ended Chireix combiner for a linear amplification with a nonlinear component amplifier. The proposed combiner structure consists of a lumped inductor and a lumped capacitor that can achieve the simple single-ended configuration of a Chireix combiner. It is also suitable for on-chip implementation with minimum efficiency d... View full abstract»

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  • The Nyquist Criterion: A Useful Tool for the Robust Design of Continuous-Time $SigmaDelta$ Modulators

    Publication Year: 2010, Page(s):416 - 420
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (278 KB) | HTML iconHTML

    In this brief, we introduce a figure of merit for the robustness of continuous-time (CT) ΣΔ modulators. It is based on the Nyquist criterion for the equivalent discrete-time loop filter. We show how CT modulators can be designed by optimizing this figure of merit. This way, we obtain modulators with increased robustness against variations in the noise-transfer-function (NTF) paramete... View full abstract»

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  • An Implementation of Fast-Locking and Wide-Range 11-bit Reversible SAR DLL

    Publication Year: 2010, Page(s):421 - 425
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (586 KB) | HTML iconHTML

    This brief proposes a novel circuit architecture of an 11-bit reversible successive approximation register (RSAR)controlled all-digital delay-locked loop (DLL), which could achieve adaptive bandwidth in a wide operation range by utilizing the modified binary search algorithm of the RS AR scheme. Moreover, it is fast locking because it finds the suitable delay range first and the successive approxi... View full abstract»

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  • Sampling and Reconstruction of Transient Signals by Parallel Exponential Filters

    Publication Year: 2010, Page(s):426 - 429
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (114 KB) | HTML iconHTML

    This brief introduces a new method for sampling of transient analog waveforms based on the parallel exponential filters. The signal is fed to the parallel network consisting of resistor-capacitor (RC) circuits, outputs of which are simultaneously sampled. We show that N previous samples of the input signal can be reconstructed from single output samples of N parallel RC circuits. The parallel samp... View full abstract»

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  • A Two-Cycle Lock-In Time ADPLL Design Based on a Frequency Estimation Algorithm

    Publication Year: 2010, Page(s):430 - 434
    Cited by:  Papers (21)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB) | HTML iconHTML

    This brief presents a frequency estimation algorithm (FEA) for an all-digital phase-locked loop (ADPLL) instead of the traditional binary frequency-searching algorithm. Based on the proposed FEA and a new fast-lock scheme, a fast-lock engine is designed to improve the lock-in time of an ADPLL design with two referenced clock cycles. An implementation of the proposed ADPLL design is realized by uti... View full abstract»

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  • A Power-Efficient Voltage Upconverter for Embedded EEPROM Application

    Publication Year: 2010, Page(s):435 - 439
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (425 KB) | HTML iconHTML

    This brief presents a power-efficient voltage upconverter applicable to a mobile electrically erasable programmable read-only memory (EEPROM). The power dissipation is reduced by optimizing the three constituent blocks: the CMOS-type Dickson's charge pump, the level detector for the boosted power supply (V P P), and the level shifter. The power consumption of the V P P level detector is greatly re... View full abstract»

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  • A Sub-200-mV Voltage-Scalable SRAM With Tolerance of Access Failure by Self-Activated Bitline Sensing

    Publication Year: 2010, Page(s):440 - 445
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB) | HTML iconHTML

    The access timing control of low-voltage static random access memory cells encounters crucial challenges in the presence of within-die (WID) variations, which induce severe delay mismatches between the timing-reference circuit and the bitlines. Prevention of early activation of sense amplifiers (SAs) is thus required to improve the yield. This brief proposes a novel SA-activation scheme by sensing... View full abstract»

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  • Low Hardware Complexity Pipelined Rank Filter

    Publication Year: 2010, Page(s):446 - 450
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (443 KB) | HTML iconHTML

    The major benefit of a disclosed low-hardware-complexity pipelined rank filter is reduction in hardware complexity and increase in processing speed, due to identical pipelined stages and the absence of mask bits. Field-programmable-gate-array realization of this filter significantly reduces the number of used logic elements and registers, in comparison with the best prior art methods, and, at the ... View full abstract»

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  • A 2.4-GS/s FFT Processor for OFDM-Based WPAN Applications

    Publication Year: 2010, Page(s):451 - 455
    Cited by:  Papers (54)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (909 KB) | HTML iconHTML

    This brief presents a fast Fourier transform (FFT) processor that provides high throughput rate (T.R.) by applying the eight-data-path pipelined approach for wireless personal area network applications. The hardware costs, including the power consumption and area, increase due to multiple data paths and increased wordlength along stages. To resolve these issues, a novel simplification method to re... View full abstract»

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  • Effects of Current Time-Delayed Feedback on the Dynamics of a Permanent-Magnet Synchronous Motor

    Publication Year: 2010, Page(s):456 - 460
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (262 KB) | HTML iconHTML

    We investigate how the dynamics of a permanent-magnet synchronous motor (PMSM) depends on current time-delayed feedback, in which the delay time is both fixed and varying in time. We choose model parameters for which the PMSM displays, in the absence of feedback, chaotic oscillations. The stable operation islands of the PMSM are first investigated in the parameter space of feedback gain and delay ... View full abstract»

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  • Blind Source Separation of Continuous-Time Chaotic Signals Based on Fast Random Search Algorithm

    Publication Year: 2010, Page(s):461 - 465
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (221 KB) | HTML iconHTML

    Blind source separation (BSS) of continuous-time chaotic signals from a linear mixture is addressed in this brief. It is assumed that the functional forms of the generating systems of chaotic signals are known, and the parameters of the generating systems and the mixture matrix are unknown. The problem of determining the parameters and the mixture matrix is formulated as an optimization one. A fas... View full abstract»

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  • Consideration of Volterra Series With Excitation and/or Impulse Responses in the Form of Dirac Impulses

    Publication Year: 2010, Page(s):466 - 470
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (98 KB) | HTML iconHTML

    In this brief, the possible extensions of the Volterra series and also incorporating Dirac impulses in it are discussed. It is shown that two of them are valid, but the third one, in the usual sense, is not. These extensions form associated models, which are very helpful in the simplification of some calculations in the nonlinear analysis of systems described by the Volterra series. View full abstract»

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  • Some New Developments on the Al-Alaoui and the Pei and Hsu s-to-z Transforms

    Publication Year: 2010, Page(s):471 - 475
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB) | HTML iconHTML

    This brief refocuses on three classes of s-to-z transforms. For each class, a closed-form expression is proposed, and a particular element, having an imaginary part of its frequency response very close to the ideal value, is presented. These s-to-z transforms are then related to all-pass infinite-impulse-response fractional delay filters, allowing another way to choose their degree of freedom. View full abstract»

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  • A Variable Regularization Method for Affine Projection Algorithm

    Publication Year: 2010, Page(s):476 - 480
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (407 KB) | HTML iconHTML

    The affine projection algorithm (APA) is a generalization of the normalized least mean square algorithm. We propose a variable regularization factor for the APA. Instead of the conventional assumption that the a posteriori error is zero, we incorporate the statistical characteristic of the noise into the adaptation process based on a system identification setup. Exact and approximate formul... View full abstract»

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  • Predictive Controller Design of Networked Systems With Communication Delays and Data Loss

    Publication Year: 2010, Page(s):481 - 485
    Cited by:  Papers (73)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (177 KB) | HTML iconHTML

    This brief studies the predictive controller design of networked systems with communication delay and data loss. A networked predictive control scheme is employed to compensate for communication delay and data loss actively rather than passively. Based on analysis of the closed-loop networked predictive control systems, a design strategy of the predictive controller is proposed. The designed predi... View full abstract»

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  • Passivity Analysis of Uncertain Singularly Perturbed Systems

    Publication Year: 2010, Page(s):486 - 490
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (119 KB) | HTML iconHTML

    This brief addresses the asymptotic stability and passivity of uncertain singularly perturbed systems. Based on the Lyapunov stability theory and a singular-system approach, some sufficient conditions in terms of linear matrix inequalities are derived. Three numerical examples are presented to demonstrate the effectiveness of the proposed theoretical results. View full abstract»

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  • In Memoriam

    Publication Year: 2010, Page(s):491 - 492
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  • Why we joined ... [advertisement]

    Publication Year: 2010, Page(s): 493
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  • IEEE 2009 Membership Application

    Publication Year: 2010, Page(s):494 - 495
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  • IEEE Transactions on Circuits and Systems—II: Express Briefs Information for authors

    Publication Year: 2010, Page(s): 496
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  • IEEE Circuits and Systems Society Information

    Publication Year: 2010, Page(s): C3
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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