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IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing

Issue 3 • Date March 1998

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Displaying Results 1 - 25 of 28
  • Comments on "A high speed realization of a residue to binary number system converter"

    Publication Year: 1998, Page(s):446 - 447
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (65 KB)

    In the above paper [see ibid., p. 661-3, October 1995], a new residue to binary converter design based on the theory which uses four operand modular adder to compute the value of S* is described. An improvement in which computational simplification of X* and its realization using three operand modular adder is presented. View full abstract»

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  • A high-accuracy CMOS oversampling switched-current sample/hold (S/H) circuit using feedforward approach

    Publication Year: 1998, Page(s):395 - 399
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    This brief presents a CMOS oversampling current sample/hold (S/H) circuit using feedforward approach. The circuit adopts an integrating feedback structure which reduces the possible errors of the current copier used to sample the input current, due to clock feedthrough, channel-length modulation and capacitive feedback. The feedforward significantly reduces the output swing of the integrator and t... View full abstract»

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  • A fast Linde-Buzo-Gray algorithm in image vector quantization

    Publication Year: 1998, Page(s):432 - 435
    Cited by:  Papers (15)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (140 KB)

    This paper presents a novel algorithm for speeding up the codebook design in image vector quantization that exploits the correlation among the pixels in an image block to compress the computational complexity of calculating the squared Euclidean distortion measures, and uses the similarity between the codevectors in the consecutive code-books during the iterative clustering-process to reduce the n... View full abstract»

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  • A method for computing the 2-D stability margin

    Publication Year: 1998, Page(s):376 - 379
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    In this brief, the margin of stability of two-dimensional (2D) discrete systems is considered. A new method to compute the stability margin of 2-D continuous systems is provided. Illustrative examples are also included View full abstract»

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  • An oversampling-based analog multitone signal generator

    Publication Year: 1998, Page(s):391 - 394
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    This brief presents the design of an analog oscillator capable of generating multitone signals by encoding the information in an oversampled delta-sigma modulated one-bit stream. With the exception of low-pass filter, the proposed design is completely digital allowing accurate control of the amplitude, frequency, and phase of all sinusoids making up the multitone signal. Simulations and FPGA exper... View full abstract»

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  • Fast center weighted Hadamard transform algorithms

    Publication Year: 1998, Page(s):429 - 432
    Cited by:  Papers (17)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    In this paper, one-dimensional (1-D) and two-dimensional (2-D) fast algorithms for realizing the center weighted Hadamard transform (CWHT) are proposed. Based on the Kronecker product and direct sum operations, the proposed 1-D and 2-D CWHT algorithms through matrix decompositions require fewer computations than the existing methods. With low complexity and regular modularity, the proposed algorit... View full abstract»

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  • Periodically nonuniform sampling of bandpass signals

    Publication Year: 1998, Page(s):340 - 351
    Cited by:  Papers (70)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    It is known that a continuous time signal x(i) with Fourier transform X(ν) band-limited to |ν|<Θ/2 can be reconstructed from its samples x(T0n) with T0=2π/Θ. In the case that X(ν) consists of two bands and is band-limited to ν0<|ν|<ν0 +Θ/2, successful reconstruction of x(t) from x(T0n) requires a... View full abstract»

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  • Harmonic distortion in high-speed differential A/D converters

    Publication Year: 1998, Page(s):403 - 406
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    The brief discusses the harmonic distortion introduced by the differential input adapter commonly used in flash and folding A/D converters operating without sample and hold. A distributed model of the adapter is proposed, which provides physical insight and allows quantitative evaluation. Moreover, a technique based on a feedforward compensation is presented. It provides a significant reduction of... View full abstract»

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  • A tunable Gaussian/square function computation circuit for analog neural networks

    Publication Year: 1998, Page(s):441 - 446
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    A Gaussian/square function computation circuit suitable for analog neural networks is proposed. It can realize Gaussian and square functions when operating in weak and strong inversion region, respectively. It is shown that the center, width, and peak amplitude of the dc transfer curve can be controlled separably. Measurement results on 3-μm CMOS fabricated chips confirm theoretical and simulat... View full abstract»

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  • RETIMAC: REal-TIme Motion Analysis Chip

    Publication Year: 1998, Page(s):361 - 375
    Cited by:  Papers (4)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    Motion estimation is relevant for applications of both motion-compensated image sequence processing and dynamic scene analysis of computer vision. Different approaches and solutions have been proposed for these two applicative fields. In some cases, parallel architectures and dedicated chips for motion estimation in real-time have been developed. In this paper, a low-cost REal-TIme Motion Analysis... View full abstract»

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  • On the design of constant settling time AGC circuits

    Publication Year: 1998, Page(s):283 - 294
    Cited by:  Papers (93)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The generalized design of Automatic Gain Control (AGC) circuits that have constant settling time is described. Each of the major components of the AGC circuit is modeled and the criteria to obtain a gain settling time independent of the absolute gain are determined. The method developed works with arbitrary monotonic nonlinear functions in the gain control characteristic of the variable gain ampli... View full abstract»

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  • A fast algorithm for morphological operations with flat structuring element

    Publication Year: 1998, Page(s):387 - 391
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    Flat structuring elements are commonly used in morphological operations. In this paper, a fast algorithm employing the result of previous searching area, which is determined by a domain-selection method, is proposed. It is applicable to structuring elements conforming to a constraint that its one-dimensional (1-D) Euler-Poincare constants, N(1/)(x) and Nsup (1/)(y), at any x- or y-coord... View full abstract»

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  • A noise-exclusive adaptive filtering framework for removing impulse noise in digital images

    Publication Year: 1998, Page(s):422 - 428
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    A class of noise-exclusive adaptive filters for removing impulse noise from digital images is developed and analyzed in this brief. The filtering scheme is based on noise detection using a self-organizing neural network and noise excluding estimation. These filters suppress impulse noise effectively while preserving fine image details. Applications of the filters to several images show that their ... View full abstract»

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  • Design of linear phase variable 2-D digital filters using real-complex decomposition

    Publication Year: 1998, Page(s):330 - 339
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    Variable digital filters are especially difficult to design when the given variable design specifications are complicated. This paper proposes a new method for designing two dimensional (2-D) variable digital filters with arbitrarily variable, magnitude characteristics and linear phase. By combining variable magnitude specification with linear phase specification, we first form a variable 2-D freq... View full abstract»

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  • A stable inverting integrator with an extended high-frequency range

    Publication Year: 1998, Page(s):399 - 402
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    A stable inverting integrator is described. The integrator is obtained by inverting the transfer function of a passive RC differentiator. The integrator uses one operational amplifier. The resulting integrator has a built-in zero that could extend its high-frequency range of operation considerably beyond that of the Miller integrator. Experimental and simulation results verify the feasibility of t... View full abstract»

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  • On the reverse jacket matrix for weighted Hadamard transform

    Publication Year: 1998, Page(s):436 - 441
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    The class of reverse jacket matrices [RJM(H)] and the corresponding restclass RJM(H) [RRJM(H)] are defined; the main property of RJM(H) is that the inverse matrices of its elements can be obtained very easily and have a special structure. RJM(H) is derived using the weighted Hadamard transform corresponding to the matrix X and a basic symmetric matrix Λ. Each element of RJM(H) is a generali... View full abstract»

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  • A global least mean square algorithm for adaptive IIR filtering

    Publication Year: 1998, Page(s):379 - 384
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    In this brief, we develop a least mean square (LMS) algorithm that converges in a statistical sense to the global minimum of the mean square error (MSE) objective function. This is accomplished by estimating the gradient as a smoothed version of the MSE, The smoothed MSE objective begins as a convex functional in the mean. The amount of dispersion or smoothing is reduced, such that over time it be... View full abstract»

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  • Analog hardware implementation issues in deterministic Boltzmann machines

    Publication Year: 1998, Page(s):352 - 360
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    The deterministic Boltzmann machine (DBM) is a neural network architecture that has a simple, local learning rule, making it an ideal candidate for implementation in massively parallel digital or analog VLSI hardware. The ability of the learning rule to compensate for hardware deficiencies simplifies a hardware implementation. This paper explores the effects of various nonideal analog hardware cha... View full abstract»

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  • Simulating lossless ladders with transconductance-C circuits

    Publication Year: 1998, Page(s):407 - 410
    Cited by:  Papers (16)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (104 KB)

    It is demonstrated in this brief that the two predominant methods for simulating an active LC ladder-operational simulation and element replacement-result in exactly the same active transconductance-capacitor filter circuit. Neither method, therefore, has any practical advantages or disadvantages over the other. Rather, a procedure can be selected purely for the designer's convenience View full abstract»

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  • Noise in Gm-C filters

    Publication Year: 1998, Page(s):295 - 302
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    Noise in Gm-C filters is discussed. Topology-independent bounds for the signal-to-noise ratio (SNR) are derived, assuming the total power dissipation or the total capacitance are specified. Expressions for certain products of noise with frequently used quantities are derived, and are shown to be invariant under certain actions, which are sometimes taken in order to improve the SNR. Finally, specif... View full abstract»

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  • Low-IF topologies for high-performance analog front ends of fully integrated receivers

    Publication Year: 1998, Page(s):269 - 282
    Cited by:  Papers (260)  |  Patents (88)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    When it comes to integratability, the zero-intermediate frequency (IF) receiver is an alternative for the heterodyne or IF receiver. In recent years, the zero-IF receiver has been introduced in several applications, but its performance cannot be compared to that of the IF receiver yet. This lower performance is closely related to its baseband operation, resulting in filter saturation and distortio... View full abstract»

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  • A compact neural-network-based CDMA receiver

    Publication Year: 1998, Page(s):384 - 387
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    A compact neural-network receiver for code-division multiple-access (CDMA) communication is presented. In the CDMA scheme, the near-far problem is a major impediment for the performance of a conventional detector (CD). By using a compact neural network with hardware annealing function and gradient-descent optimization technique, an optimal multiuser receiver can be implemented. The algorithm and s... View full abstract»

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  • Test pattern generation and signature analysis for burst errors

    Publication Year: 1998, Page(s):410 - 414
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    In testing certain systems, checking for burst errors is important. This is due to the fact that errors are confined to a certain number of bits. If signature analysis is used to test a circuit then the testing capabilities depend on the polynomial that defines the linear feedback shift register (LFSR) used in the test. In this paper we show that the LFSR that is suitable for checking for burst er... View full abstract»

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  • One-hot residue coding for low delay-power product CMOS design

    Publication Year: 1998, Page(s):303 - 313
    Cited by:  Papers (22)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    CMOS implementations of arithmetic circuits for One-Hot Residue (OHR) encoded operands are presented. They are shown to possess SPICE-simulated delay-power (DP) products that are significantly reduced below those of their binary number system counterparts (ripple-carry adder and Wallace tree multiplier). The reduction is attributable to the one-hot representation, which decreases the number of cri... View full abstract»

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  • Supply voltage scaling for temperature insensitive CMOS circuit operation

    Publication Year: 1998, Page(s):415 - 417
    Cited by:  Papers (49)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    CMOS supply voltage scaling for temperature independent gate delay is investigated. It is found that the optimum supply voltage which results in temperature insensitive operation is proportional to the threshold voltage. This voltage enables a single battery cell operation. CMOS technologies with 0.35- and 0.25-μm size features are used as examples in this study View full abstract»

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Aims & Scope

This title ceased production in 2003. The current updated title is IEEE Transactions on Circuits and Systems II: Express Briefs.

Full Aims & Scope