Proceedings of the 1998 Second IEEE International Caracas Conference on Devices, Circuits and Systems. ICCDCS 98. On the 70th Anniversary of the MOSFET and 50th of the BJT. (Cat. No.98TH8350)

4-4 March 1998

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  • Proceedings of the 1998 Second IEEE International Caracas Conference on Devices, Circuits and Systems. ICCDCS 98. On the 70th Anniversary of the MOSFET and 50th of the BJT. (Cat. No.98TH8350)

    Publication Year: 1998
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    Freely Available from IEEE
  • Design of an instrumentation system for a neurocardiology laboratory

    Publication Year: 1998, Page(s):272 - 277
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (773 KB)

    Neurocardiology laboratories must have means to acquire and characterize neurally mediated cardiovascular responses. Since neurocardiology is an emerging field, there is a lack of standardization, and therefore there is a need for specific, flexible and customized instrumentation to appropriately measure a representative set of cardiorespiratory signals, from which the amount of autonomic modulati... View full abstract»

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  • Author index

    Publication Year: 1998, Page(s):460 - 461
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    Freely Available from IEEE
  • High-pass minimum-phase filter design from linear-phase startpoint

    Publication Year: 1998, Page(s):231 - 234
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    This paper presents a new practical design approach for a high-pass minimum-phase FIR filter. The method is based on an interpolated FIR (IFIR) low pass structure composed of two stages with much lower order than prototype filter. The novelty of this technique lies in overcoming the inherent problem of finding the roots of a high order polynomial View full abstract»

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  • Past and future directions in cellular telephony

    Publication Year: 1998, Page(s):7 - 13
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    This paper presents an overview of the technological challenges faced by the mobile cellular telephone industry in the quest to provide cheaper and more reliable services. Analog first-generation and digital second-generation cellular systems used in Europe, Japan and the United States are discussed. These systems are designed to support voice communication with limited data communication capabili... View full abstract»

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  • Dependence of the cut off frequency on Ge profiles, base and collector widths in SiGe HBTs

    Publication Year: 1998, Page(s):33 - 36
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    The dynamic performance of SiGe HBTs in terms of the cut off frequency is investigated by numerical device simulation. Simulations using both the drift diffusion and the energy transport model are carried out for a variety of different HBT structures. Based on the simulation results, design criteria for SiGe HBTs are derived. Limits of the validity of the drift diffusion model are discussed View full abstract»

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  • Dynamic scene analysis from the polar form of image flow representations

    Publication Year: 1998, Page(s):226 - 230
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A basic area of research in digital video processing is the frame to frame low level motion estimation of image sequences. The motion information obtained is usually displayed as a 2-D distribution of displacement vectors, called the optical flow field or image flow. How to use that information, in order to precisely estimate the location of objects in the scene, remains a relevant and very hard p... View full abstract»

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  • MOS transistor pressure sensor

    Publication Year: 1998, Page(s):381 - 385
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    An expression that describes the behavior of the channel mobility of a metal oxide semiconductor transistor (MOST) under pressure, longitudinally oriented with respect to the edge of a silicon square diaphragm, used as a pressure sensor, is derived. This expression is incorporated into PSPICE, to allow the modeling of transistors under pressure, by means of this conventional simulator. An integrat... View full abstract»

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  • A SDH overhead terminator chip set for 10 Gbit/s optical transmission system

    Publication Year: 1998, Page(s):201 - 205
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    A SDH overhead terminator chip set has been designed for 10 Gbit/s optical transmission system. The chip set built on 0.6 μm CMOS technology and 0.6 μm H-GaAs III MESFET technology successfully realizes the functions needed for regenerator section termination and multiplex section termination with alarm detection and generation, and performance monitoring. This paper introduces a novel multi... View full abstract»

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  • System technology challenges facing the PC industry

    Publication Year: 1998, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Personal computers continue to achieve performance levels that exceed those exhibited by mainframes and minicomputers only a few years ago. As in the case of mainframes, these performance gains are coupled with significant increases in power dissipation, electromagnetic emissions, and tighter requirements for power delivery and high speed signaling. In contrast with big computers, however, PCs hav... View full abstract»

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  • A novel position estimation technique for interior permanent magnet synchronous motor control

    Publication Year: 1998, Page(s):358 - 360
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    A new sensorless position estimation technique for interior permanent magnet synchronous motor (IPM) is presented. Permanent magnet synchronous motors generally require a rotor position sensor to achieve the vector control; however, this sensor increases product cost and maintenance. From these backgrounds, position sensorless schemes have received wide interest for industrial applications. The ph... View full abstract»

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  • Field programmable gate array design for an application specific signal processing algorithms

    Publication Year: 1998, Page(s):222 - 225
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Field Programmable Gate Array (FPGA) architectures have emerged as an alternative means of implementing complex logic circuits providing rapid manufacturing turnaround time and low prototyping costs. This paper presents a new FPGA architecture suitable for the application specific signal processing algorithms and Wafer-Scale integration (WSI) Technology. The architecture must be designed for versa... View full abstract»

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  • On the self-calibration of stochastic magnetic sensor arrays

    Publication Year: 1998, Page(s):378 - 380
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    A new autocalibration method is proposed for digital magnetic sensor arrays which are highly sensitive to process variations. By using a modified digitally controlled charge pump there is no need for extra controlling voltages, floating control gates or laser trimming. The charge pump is driven by an adaptive filter to find the optimum threshold voltages for the sensor flip-flops View full abstract»

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  • Performances of VSB and QAM-concepts for digital terrestrial TV transmission

    Publication Year: 1998, Page(s):194 - 200
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    A computer simulated QAM and VSB concept (ATSC-Standard) for a 7 MHz transmission channel are described and the performances are compared. Each considered concept consists of an individual carrier recovery, timing recovery and phase tracking loop. A periodically inserted training sequence implemented in the transmitter of each realized concept is used to calculate the coefficients of an adaptive e... View full abstract»

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  • A non-linear filtering for block-edge reduction in digital video

    Publication Year: 1998, Page(s):178 - 180
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    In digital video coding, the 2D block-based Discrete Cosine Transform (DCT) has been widely used, combined with the quantisation techniques of DCT coefficients, for the purpose of compression of video data. When coarser quantisation is employed, the DCT blocks become prominent in the reconstructed images and this affect is called block-edge artifact. Several linear filters have been proposed in th... View full abstract»

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  • Standstill estimation of electrical parameters in motors with optimal input signals

    Publication Year: 1998, Page(s):407 - 413
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    The paper deals with the problem of the conditions for an optimal accuracy at the application of parameter estimation methods on induction motors at standstill. A discrete-time model of the machine and excitations with voltage steps and pseudo-random-binary signals (PRES) are used. The high influence of the input signal concerning the analysis time, the voltage level and the frequency spectrum to ... View full abstract»

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  • Adaptive neurofuzzy networks in engineering: an epitome

    Publication Year: 1998, Page(s):348 - 357
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    During the last decade, the resurgence of artificial neural networks, the applicability of fuzzy logic, and the extensive work on linear adaptive filters have had a significant impact on engineering. The adaptive network concept unifies these areas since they all share this worth...they can adapt to changing situations, learn, or approximate, the relationships among the variables of a given system... View full abstract»

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  • Earthquake epicenter location using time-frequency representations

    Publication Year: 1998, Page(s):217 - 221
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    Epicenter location can be determined using the times of arrival of the P and S phases present in the seismogram. Different methods have been applied for seismic detection. The best results have been obtained when multi-station three-dimensional data are used, but a reliable phase detection technique using one-dimensional data does not exist. Time-Frequency Representations (TFRs) are an alternative... View full abstract»

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  • New kind of fluxgate magnetometer probe with enhanced electronic processing

    Publication Year: 1998, Page(s):372 - 377
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    The design of a new kind of probe, providing the advantages of closed path magnetic circuits, is described in this work. It also provides off-set adjustment and a higher directionality as compared with the ring core probes. Signal conditioning circuits for fluxgate magnetometers require synchronization circuits for the pick-up coils second harmonic signal and the reference signals. Any phase diffe... View full abstract»

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  • Fault detection and localization method for SDH BDCS with complex switch

    Publication Year: 1998, Page(s):189 - 193
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    This paper describes switch network architecture for Synchronous Digital Hierarchy BDCS (Broadband Digital Cross-Connect System), automatic detection of connection matrix status for AU3/4 of switching unit under it, detection of transmission error between unit switches and transmission error for switching routing path. It expands T switch spatially in existing T-S-T switch to make switch network a... View full abstract»

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  • Development of microelectronics training tools on PC

    Publication Year: 1998, Page(s):127 - 131
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    This paper presents a PC based software running on PC/Windows-95 dedicated to the advanced training in VLSI design, with specific features on sub-micron technology. The software consists in a HDL-based schematic editor with on-line simulator, a layout editor with HDL-compiler and sophisticated on-line analog simulation. Furthermore, the tool includes a set of tutorials covering various aspects of ... View full abstract»

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  • Bipolar Schmitt Trigger circuit implementation using a Gain Cell

    Publication Year: 1998, Page(s):106 - 108
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    This paper presents the results of a bipolar integrated circuit implementation of a Schmitt Trigger, using a Gain Cell, with a frequency response in excess of 10 MHz. This design is a part of a building block for performing analog functions in complex analog integrated circuits. The motivation was to research the translinear principle and its behaviour in not yet studied configurations (closed loo... View full abstract»

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  • Integrated system for machine drives (ISMAD)

    Publication Year: 1998, Page(s):267 - 271
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    This work presents a new PC-based Integrated System for MAchine Drives (ISMAD), which allows one to analyze and test chopper drives for DC motors and inverter drives for AC motors, operated under scalar control techniques. This system has been designed using IGBTs and includes a control card to be inserted in a PC, and a drive and power stage to operate the machines. With ISMAD both open loop and ... View full abstract»

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  • Biologically-inspired digital circuit for a self-organising neural network

    Publication Year: 1998, Page(s):172 - 177
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    This work presents the design and characterisation of a fully digital VLSI ASIC neuron cell. The 25 mm2 IC die was fabricated in a 1.2 micron CMOS technology and has 5 k equivalent gates. Its architecture was designed to implement neural networks based on the Self-Organising Feature Maps (SOFM) with enhanced performance in high-speed applications. Various learning parameters can be prog... View full abstract»

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  • Sliding mode control: a robust approach to integrating systems with dead time

    Publication Year: 1998, Page(s):401 - 406
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    This article presents an easy way to control integrating systems using a sliding mode controller based on a first-order-plus-dead-time (FOPDT) model of the process. A simple method of system identification is proposed to obtain the FOPDT model parameters. A set of tuning equations for the controller are established as functions of the parameters. Finally, an integrating chemical process is simulat... View full abstract»

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