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Circuits and Systems II: Express Briefs, IEEE Transactions on

Issue 1 • Date Jan. 2004

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Displaying Results 1 - 17 of 17
  • Table of contents

    Publication Year: 2004 , Page(s): 01
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  • IEEE Transactions on Circuits and Systems—II: Express Briefs publication information

    Publication Year: 2004 , Page(s): 0_2
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  • Editorial

    Publication Year: 2004 , Page(s): 1 - 2
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  • A simplified lattice factorization for linear-phase paraunitary filter banks with pairwise mirror image frequency responses

    Publication Year: 2004 , Page(s): 3 - 7
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (208 KB)  

    In this paper, by extending our previous work on general linear-phase paraunitary filter banks even-channel (LPPUFBs), we develop a new structure for LPPUFBs with the pairwise mirror image (PMI) frequency responses, which is a simplified version of the lattice proposed by Nguyen et al. Our simplification is achieved through trivial matrix manipulations and the cosine-sine (C-S) decomposition of a general orthogonal matrix. The resulting new structure covers the same class of PMI-LPPUFBs as the original lattice, while substantially reducing the number of free parameters involved in the nonlinear optimization. A design example is presented to demonstrate the effectiveness of the new structure. View full abstract»

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  • Using the weak inversion region to optimize input stage design of CMOS op amps

    Publication Year: 2004 , Page(s): 8 - 14
    Cited by:  Papers (20)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (184 KB) |  | HTML iconHTML  

    Operation of MOS devices in the strong, moderate, and weak inversion regions is considered. The advantages of designing the input differential stage of a CMOS op amp to operate in the weak or moderate inversion region are presented. These advantages include higher voltage gain, less distortion, and ease of compensation. Specific design guidelines are presented to optimize amplifier performance. Simulations that demonstrate the expected improvements are given. View full abstract»

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  • Continuous-time integrated FIR filters at microwave frequencies

    Publication Year: 2004 , Page(s): 15 - 20
    Cited by:  Papers (9)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (344 KB) |  | HTML iconHTML  

    We discuss adaptive integrated finite-impulse response (FIR) filters operating in the continuous time domain. These filters become attractive to implement at microwave frequencies. An important topological property of the traveling wave FIR filter is presented, and its advantages when used as an adaptive equalizer are pointed out. Design considerations and modeling aspects of compact on-chip delay lines are given. Simulation results for an adaptive equalizer operating at a data rate of 10 Gb/s are presented. View full abstract»

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  • Power-efficient FIR filter architecture design for wireless embedded system

    Publication Year: 2004 , Page(s): 21 - 25
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (368 KB) |  | HTML iconHTML  

    This paper presents a novel approach for implementing power-efficient finite-impulse response (FIR) filters that requires less power consumption than traditional FIR filter implementation in wireless embedded systems. The proposed schemes can be adopted in the direct form FIR filter and achieve a large amount of reduction in the power consumption. By using a combination of proposed methods, balanced-modular techniques with retiming and separated processing data-flow scheme with modified canonical signed digit (CSD) representation, experimental results show that the proposed scheme reduce 76% power consumption of the original direct-form structure with slight area overhead. View full abstract»

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  • Improved RNS FIR filter architectures

    Publication Year: 2004 , Page(s): 26 - 28
    Cited by:  Papers (35)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (168 KB) |  | HTML iconHTML  

    A new architecture for implementing finite-impulse response (FIR) filters using the residue number system (RNS) is detailed. The design is based on using a restricted modulus set, with moduli of the form 2n,2n-1, and 2n+1. This does not restrict the modulus set to the common 3 modulus set {2n-1,2n,2n+1}, but any number of pairwise relatively prime moduli of this form, for example, {5,7,17,31,32,33}. Based on a comparison with a 2's complement design, the new RNS design can offer a significant speed improvement. The gain is obtained by using a set of small moduli, selected so as to minimize critical path delay and area. An algorithmic approach is used to obtain full adder based architectures that are optimized for area and delay. The modulus set is optimum based on cost parameters for each modulus. This new architecture presents a practical approach to implementing a fast RNS FIR filter. View full abstract»

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  • Improved approximate QR-LS algorithms for adaptive filtering

    Publication Year: 2004 , Page(s): 29 - 39
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (384 KB) |  | HTML iconHTML  

    This paper studies a class of O(N) approximate QR-based least squares (A-QR-LS) algorithm recently proposed by Liu in 1995. It is shown that the A-QR-LS algorithm is equivalent to a normalized LMS algorithm with time-varying stepsizes and element-wise normalization of the input signal vector. It reduces to the QR-LMS algorithm proposed by Liu et al. in 1998, when all the normalization constants are chosen as the Euclidean norm of the input signal vector. An improved transform-domain approximate QR-LS (TA-QR-LS) algorithm, where the input signal vector is first approximately decorrelated by some unitary transformations before the normalization, is proposed to improve its convergence for highly correlated signals. The mean weight vectors of the algorithms are shown to converge to the optimal Wiener solution if the weighting factor w of the algorithm is chosen between 0 and 1. New Givens rotations-based algorithms for the A-QR-LS, TA-QR-LS, and the QR-LMS algorithms are proposed to reduce their arithmetic complexities. This reduces the arithmetic complexity by a factor of 2, and allows square root-free versions of the algorithms be developed. The performances of the various algorithms are evaluated through computer simulation of a system identification problem and an acoustic echo canceller. View full abstract»

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  • Elimination of overflow oscillations in fixed-point state-space digital filters with saturation arithmetic: an LMI approach

    Publication Year: 2004 , Page(s): 40 - 42
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (96 KB) |  | HTML iconHTML  

    A novel, linear-matrix inequality (LMI) based, criterion for the nonexistence of overflow oscillations in fixed-point state-space digital filter employing saturation arithmetic is presented. The criterion is based on a unique characterization (as prevailing in the filter under consideration) of the saturation nonlinearities, namely, an "effective" reduction of the sector. View full abstract»

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  • Corrections to “An RNS to Binary Converter in a Three Moduli Set With Common Factors”

    Publication Year: 2004 , Page(s): 43
    Cited by:  Papers (1)
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  • Discussion of "Scheduling of spinning reserve considering customer choice on reliability"

    Publication Year: 2004 , Page(s): 44
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    Prospective authors are requested to submit new, unpublished manuscripts for inclusion in the upcoming event described in this call for papers. View full abstract»

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  • ICECS 2004

    Publication Year: 2004 , Page(s): 45
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  • Proceedings of the IEEE celebrating 92 years of in-depth coverage on emerging technologies

    Publication Year: 2004 , Page(s): 46
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  • IEEE copyright form

    Publication Year: 2004 , Page(s): 47 - 48
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  • IEEE Circuits and Systems Society Information

    Publication Year: 2004 , Page(s): 0_3
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  • IEEE Transactions on Circuits and Systems—II: Express Briefs Information for authors

    Publication Year: 2004 , Page(s): 04
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Aims & Scope

TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes:

  • Circuits: Analog, Digital and Mixed Signal Circuits and Systems  
  • Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic
  • Circuits and Systems, Power Electronics and Systems
  • Software for Analog-and-Logic Circuits and Systems
  • Control aspects of Circuits and Systems. 

Full Aims & Scope