1998 IEEE International Conference on Electronics, Circuits and Systems. Surfing the Waves of Science and Technology (Cat. No.98EX196)

7-10 Sept. 1998

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  • 1998 IEEE International Conference on Electronics, Circuits and Systems [front matter]

    Publication Year: 1998, Page(s):i - C
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    Freely Available from IEEE
  • Author index

    Publication Year: 1998, Page(s):561 - 569
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    Freely Available from IEEE
  • Methods based on wavelets for time delay estimation of ultrasound signals

    Publication Year: 1998, Page(s):113 - 116 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    It is well known that classical time delay estimation gives an inexact estimation of the true delay between two signals delayed by non integral multiple of the sample period. For more accurate estimation, new methods are proposed to estimate small time delay with regard to the sample period of ultrasonic signals. In this paper, we focus on two methods based on the wavelet transform for time delay ... View full abstract»

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  • Analysis of wavelet features for myoelectric signal classification

    Publication Year: 1998, Page(s):109 - 112 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The common feature for classifying Motor Unit Action Potentials (MUAPs) of intramuscular myoelectric (EMG) signals is the Euclidean distance between the MUAP waveforms. The main effect which decreases the classification performance is MUAP shimmer. In this paper we show the relation between MUAP shimmer and the wavelet coefficients using a multiresolution approach and propose a selection of wavele... View full abstract»

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  • Spin-valve tape heads

    Publication Year: 1998, Page(s):255 - 258 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    Shielded sensor-in-gap tape heads were fabricated and characterized, showing an output of 1.8 mVpp/μm at low density and 0.58 mVpp/μm at 100 KFCI. The operation of the spin-valve sensor is discussed and the performance of TbCo, NiO and MnRh exchange layers is compared, showing MR signals up to 6.5% and thermal stability above 250°C. Sensor-in-gap geometry is discuss... View full abstract»

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  • A fuzzy synchronization algorithm for bimodal speech signals

    Publication Year: 1998, Page(s):553 - 556 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    This paper describes a rule-based fuzzy system that estimates the relationship between acoustic and visual speech and uses this estimate for the synchronization of not aligned audio-visual signals. The relations are quantified by means of a set of rules, which associate typical mouth shapes (visual classes) to specific acoustic classes. The visual and acoustic classes are learned from training dat... View full abstract»

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  • Design of equiripple stopband even and odd order linear phase IIR filters

    Publication Year: 1998, Page(s):491 - 494 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    This paper presents a method for designing even and odd order, equiripple stopband, arbitrary passband amplitude, perfect linear phase IIR transfer functions with mirror image pole pairs around the unit circle in the z-plane. Starting from a suitable nonlinear phase subfilter, the perfect linear phase transfer function is derived using an auxiliary allpass function in the transformed frequency dom... View full abstract»

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  • Transient analysis for high-speed interconnect networks based on AWE and delay evaluation technique

    Publication Year: 1998, Page(s):103 - 106 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    This paper describes an efficient moment-matching method to simulate high-speed interconnect networks. Removing the wave propagation delays from the equations of transmission lines using the delay evaluation technique, the present method enables to simulate accurate transient waveforms using the conventional asymptotic waveform evaluation technique View full abstract»

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  • A 0.7 μm CMOS clock recovery circuit for 622 Mb/s SDH systems

    Publication Year: 1998, Page(s):411 - 414 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A clock recovery circuit for SDH STM-4 applications is described. The circuit has been implemented in a 0.7 μm CMOS technology. A digital VCO has been designed for the 622 MHz frequency. The chip sustained working frequencies from 550 up to 700 MHz. The recovered clock jitter (peak-to-peak) is under 150 ps, for SDH STM-4 data signals View full abstract»

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  • RISC-based coprocessor with a dedicated VLSI neural network

    Publication Year: 1998, Page(s):281 - 283 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    In this paper, a multilayer perceptron, so called the DMNN (Digital Multilayer Neural Network), is designed in VLSI. The DMNN has a modular architecture leading to an effective hardware implementation of multiple multilayer perceptrons. Any size of the DMNN can be built using basic modules implemented using FPGAs. The architecture of a RISC-based coprocessor including the DMNN unit, a control and ... View full abstract»

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  • Image compression using a mixed-transform technique and vector quantization

    Publication Year: 1998, Page(s):511 - 514 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    A new technique for lossy image compression is proposed. The technique is based on the wavelet transform of the original image combined with the discrete cosine transform of the low-frequency scaling coefficients. The remaining wavelet coefficients are compressed using vector quantization. The technique was tested on a series of facial images and the results obtained indicate an average peak-signa... View full abstract»

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  • 4-subject 4-channel optical telemetry system for use in electrocardiograms

    Publication Year: 1998, Page(s):251 - 254 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    The implementation of a 4-subject, 4-channel optical telemetry system for the measurement of electrocardiograms (ECGs) is described in this paper, a system which receives and transmits physiological signals to the external system using LED and infrared light of photodiode. This system decreases the dependency of power supply voltage to the CMOS IC chip and also uses a new enforced synchronization ... View full abstract»

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  • Speech coding via Balanced Model Truncation-a novel approach

    Publication Year: 1998, Page(s):547 - 551 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    This paper reports on the novel application of the Balanced Model Truncation (BMT) technique to speech coding. Starting from a source-filter model of speech, we expose the use of BMT in coding the filter parameters, following the separation of speech from the excitation via homomorphic deconvolution. BMT fundamentals, details of a BMT driven speech coder, including related subsidiary improvements,... View full abstract»

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  • Design of optimum high order crossover coefficients

    Publication Year: 1998, Page(s):19 - 22 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    Frequency dividing of signal by crossover is used sometimes for different analog and digital processing. This paper shows conditions for minimum crossover influence to transferred signal. By this way the optimum coefficients are derived for high order transfer functions of low-pass and high-pass crossover filters. This solution offers the zero magnitude and minimum phase influence. A discussion of... View full abstract»

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  • A high performance class AB current conveyor

    Publication Year: 1998, Page(s):143 - 146 vol.3
    Cited by:  Papers (9)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A class AB CMOS current conveyor is developed for wideband current-mode signal processing, It consists of a differential stage for the voltage input, a single-ended push-pull stage for the current input, and current mirrors for the current output. The differential and push-pull stages form a unity-gain buffer, to realize exact voltage-following action and low impedance at the current input node. S... View full abstract»

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  • Taxonomic problems on ADC characterisation

    Publication Year: 1998, Page(s):445 - 448 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    In this paper the authors emphasise the need for the development of a new standard with parameter definition and measurement methods for ADC characterisation. This new standard should establish a complete taxonomy. Experimental and numerical simulation results of ADC dynamic characterisation are presented. They show that different values of the integral nonlinearity vector are obtained for the sam... View full abstract»

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  • Recent advances in 40 Gb/s digital functions for high bit rate telecommunication applications

    Publication Year: 1998, Page(s):389 - 392 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    This contribution presents a new set of digital ICs dedicated to optical fibre links, realised using a qualified GaAs P-HEMT technology with 0.25 μm gate length. The ICs include 2:1 selectors, 1:2 DEMUXes, D-flip-flops, dividers by 2, operating at bit-rates up to 40 Gb/s. Applications include high speed optical fibre systems. These circuits may also be considered as basic building blocks for fu... View full abstract»

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  • A new formulation for accurate numerical extraction of interconnect capacitance in ULSI

    Publication Year: 1998, Page(s):99 - 102 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    We present a new formulation for numerical extraction of capacitance in ULSI interconnects, which employs a single-layer potential description to compute the charge density distribution, and hence the coupling capacitance. The single-layer potential description also yields a Fredholm integral equation of the second kind, for which efficient numerical algorithms are available. Here, we consider not... View full abstract»

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  • Efficient realization of the M-D nonrecursive filters: from sequential implementation to mapping on systolic array processors

    Publication Year: 1998, Page(s):495 - 498 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    This paper presents algorithms and architectures for implementing from 1-D to multidimensional M-D digital nonrecursive filters. These architectures are very regular and support single chip implementation in VLSI, as well as multiple chip implementations. The proposed systolic arrays, used in implementation of these algorithms, are optimal with respect to time. In a systolic implementation the hig... View full abstract»

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  • Some thoughts on the word error rate measurement of A/D converters

    Publication Year: 1998, Page(s):453 - 456 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The word error rate (WER) of an A/D converter quantifies the probability that a wrong output code occurs because of metastability, intrinsic noise or aperture uncertainty. It can be measured in real-time, as it is customary for very low WER converters, or by post processing, when the WER is more relevant. In the paper the possible causes of inaccuracy are analyzed. First, the existing methods are ... View full abstract»

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  • Codevelopment of long haul ISDN transceiver and design methodology improves time to market

    Publication Year: 1998, Page(s):407 - 410 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    This paper introduces a design project, where an appropriate design methodology development did accompany the core design task. The promising results indicate that well suited design methodologies adapted to the complex tasks of chip design do become a major factor in competition View full abstract»

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  • The neuron-bipolar junction transistor (v-BJT)-a new device structure for VLSI neural network implementation

    Publication Year: 1998, Page(s):277 - 280 vol.3
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A new device structure called the neuron-bipolar junction transistor (vBJT) for the compact implementation of VLSI neural network is proposed and analyzed. In the new device structure, the parasitic PNP bipolar junction transistor in the CMOS process is used to implement the neuron whereas the spreading base resistor array is used to realize the synapse weights for various neuron inputs. The multi... View full abstract»

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  • A DSP testing approach by modeling the circuit response as a Markov chain

    Publication Year: 1998, Page(s):241 - 247 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    An approach based on signal processing and time domain analysis is proposed to test linear and non-linear analog circuits. A step signal is applied as an input stimulus and the response is measured at the output. A stochastic model is used to represent the response of a DUT to the step input. The process itself is modeled as a monodesmic, ergodic Markov chain. Different metrics are computed for th... View full abstract»

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  • A high-speed fully differential current switch

    Publication Year: 1998, Page(s):343 - 346 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    A high-speed fully differential current switch is presented. The clock-feedthrough effect is reduced by Swing-Reduced Drivers (SRDs) and neutralized by dummy transistors. With the use of SRDs, less charges are required to be transferred to/from the gates of the switching transistors, and hence, the switching speed can be increased without significant output error. The SRDs also reduce the possible... View full abstract»

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  • Design method of analog lowpass filters with monotonic response and arbitrary flatness

    Publication Year: 1998, Page(s):15 - 18 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    We propose a closed form transfer function of analog low-pass filters with monotonic response and arbitrary flatness characteristics, which contains the transfer functions of the Butterworth filter and the L filter. Furthermore, the proposed transfer function can be easily realized because of its closed form regardless of even or odd orders View full abstract»

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