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IEEE Region 5 Conference, 1988: 'Spanning the Peaks of Electrotechnology'

Date 21-23 Mar 1988

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Displaying Results 1 - 25 of 52
  • Reliability testing for non-constant MTBFs

    Publication Year: 1988, Page(s):232 - 234
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (52 KB)

    The mean time between failures (MTBF) of new products has been found to increase with time due to the decreasing number of process problems and design problems found as test time is accumulated. The author's purpose is to show one method of considering this when developing a probability ratio sequential test plan (PRST). The method results in a shorter test time to an accept decision for a product... View full abstract»

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  • Towards portable microcode

    Publication Year: 1988, Page(s):1 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (391 KB)

    The implementation of a retargetable microcode generator system (RMGS) is described for a six-stage translation system. Portability of microcode is achieved by specifying microprograms in a C-like HLL (high-level language) and translating the specification into horizontal microcode. The HLL microprogram description is translated into an intermediate semantic description language (ISDL). The ISDL s... View full abstract»

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  • The use of threshold logic to improve performance in scheduling a manufacturing process

    Publication Year: 1988, Page(s):11 - 14
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (209 KB)

    Simulation and threshold logic are used to demonstrate the feasibility of a learning system that increases production output. Production is simulated with a discrete, next-event model having multiple paths and multiple processes on each path. Switches located throughout the model can direct production units to avoid bottlenecks and improve output. Each switch in the model is controlled by the acti... View full abstract»

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  • A diagnostic advisor

    Publication Year: 1988, Page(s):15 - 17
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (170 KB)

    An expert system is being developed at Federal Express Corporation to assist the staff to diagnose problems and help customers recover from errors. The development schedule for the expert system diagnostic advisor, called the Hotline Help Desk, was divided into three phases. The first phase was developing a demonstration system. The second phase, a field test system, was an expanded demonstration ... View full abstract»

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  • Detection models for radar ground targets

    Publication Year: 1988, Page(s):18 - 22
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (285 KB)

    Models are presented for ground targets detected by a high resolution airborne radar. Results of the modeling of some simple scatterers are presented, along with chi-square approximations to these models. Simple stabilized targets are modeled with 0.6 to 0.8 duo degrees of freedom (K). Targets with unknown rotation are modeled with K of about 0.3. The effect of cell straddling is quantified and fo... View full abstract»

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  • Data from the Sun

    Publication Year: 1988, Page(s):60 - 62
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    The authors plan to implement an insolation data collection system in connection with a solar-energy research program of a local electric utility company. The system will be implemented in two independent parts. The hardware for the first part will consist of an IBM PC-compatible microcomputer equipped with a Metrabyte Dash-16 data acquisition system. The data acquisition hardware will be connecte... View full abstract»

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  • Microwave filter design using radial line stubs

    Publication Year: 1988, Page(s):68 - 72
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (367 KB)

    The design of microwave filters using radial line stubs as reactive elements is investigated. To reduce the design complexity, a simplified model for radial line stub reactance versus frequency is first developed. This allows for an easy transition from the lowpass prototype to the desired planar circuit elements. The frequency-response characteristic of specific radial line stub filter is compare... View full abstract»

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  • Rapid thermal annealing of Be implanted GaAs

    Publication Year: 1988, Page(s):73 - 6A
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (255 KB)

    Rapid thermal annealing is used to activate shallow-Be-implanted in GaAs. A proximity annealing technique is used which minimizes As evaporation. Because the substrate is left capless during annealing, surface interaction with the cap and interfacial stress are relieved. Surface morphology and Be redistribution during annealing are analyzed by scanning electron microscopy and secondary ion mass sp... View full abstract»

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  • Two dimensional calculation of diffusive photocurrent in epitaxial bipolar devices

    Publication Year: 1988, Page(s):77 - 81
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (219 KB)

    A 2D finite-difference model is presented that provides significant improvement over existing analytical approximations for the diffusive photocurrent generated in the collector by an epitaxial bipolar device when exposed to ionizing radiation. The model is used to gauge the effect of surface recombination on the amount of photocurrent generated. It is also used to compare the accuracy of several ... View full abstract»

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  • Color image digitization for real-time video processing

    Publication Year: 1988, Page(s):89 - 92
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    A description is given of a full-rate color image digitization system that was developed to provide capabilities not available on commercial imaging products. The system provides a continuous full-rate data transfer bus, YIQ digitization formats, logarithmic companding, and real-time data flow synchronization for displaying images that have been transferred over asynchronous communications links.<... View full abstract»

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  • Still-frame image transmission using DPCM/interpolative coding

    Publication Year: 1988, Page(s):93 - 98
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    Two methods of combining DPCM (differential pulse-code modulation) and interpolation are proposed for compressing still-frame teleconferencing signals. The first method uses horizontal subsampling, DPCM, and interpolation to achieve a 4:1 compression. The other method is similar but uses vertical subsampling instead. Simulation results indicate that either method can easily achieve the required 2-... View full abstract»

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  • A high-speed parallel computer board for color image processing, compression and transmission

    Publication Year: 1988, Page(s):99 - 102
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (238 KB)

    A high-speed parallel computer board has been designed for use as a module in a color image compression and transmission system. The computer board's architecture provides high computational power, improved input/output (I/O) of image data, and flexibility for a variety of image processing applications. While the initial application of the board is as a testbed for image compression algorithms, ot... View full abstract»

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  • A CCD image sensor frame grabber

    Publication Year: 1988, Page(s):103 - 106
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (281 KB)

    A system interface is described for a specific CCD image sensor that digitizes and collects the image from the sensor for storage in a personal computer. The output of the CCD image sensor is fed through an 8-bit flash analog-to-digital convertor and stored in a buffer memory. During the next integration period the image is loaded into the computer and processed. The system allows the imager to ut... View full abstract»

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  • VLSI layout of a pipelined multiplier

    Publication Year: 1988, Page(s):121 - 125
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (347 KB)

    The proposed multiplier views the operations as a logical one, without using addition or counting. Such a novel view provides grounds for a high pipeline throughput. The authors discuss the algorithm and then the cell design, cell placement, and a routing scheme in the VLSI layout of the proposed multiplier using CMOS technology. Then they compare their design against a number of recently proposed... View full abstract»

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  • An enhancement of the TMS32010 digital signal processor in a NS32016 microcomputer system

    Publication Year: 1988, Page(s):126 - 128
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (223 KB)

    To overcome the shortcoming of time-consuming digital signal processing functions performed in a NS32016 microcomputer system, the TMS32010 serves as an independent numeric processor to implement the numeric processor to implement the numeric intensive algorithms. Hardware developments including direct memory expansion and extended memory interface are presented. Also, ADC (analog-to-digital conve... View full abstract»

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  • High speed target recognition using a three plane optical correlator

    Publication Year: 1988, Page(s):129 - 132
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    A magnetooptic device (SIGHT-MOD) capable of producing thousands of frames per second at 128*128 binary pixels per frame is discussed. This new modulator capability allows the consideration of extremely high filter frame rates necessary to construct a binary-phase-only filter (BPOF) for various target objects at a variety of aspect angles. The authors present an overview of research in progress co... View full abstract»

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  • Programmable digital filter workstation for electrical engineering students

    Publication Year: 1988, Page(s):138 - 142
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (253 KB)

    A programmable digital filter workstation is discussed that provides classical analysis and design tools for the electrical engineering student. Further, through the data acquisition system, the student can test the design on actual audio signals online. With the provision of this feature within a single workstation, the user receives instant feedback as to the quality of the digital filter design... View full abstract»

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  • Computer aided test synthesis for a parallel scan design of finite state sequential machines

    Publication Year: 1988, Page(s):152 - 156
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (213 KB)

    A parallel scan design for finite-state machines (FSMs) was proposed by S.M. Reddy and R. Dandapani (1987), and analyzed for critical parameters such as area, delay, and active devices. The authors study the design presented by Reddy and Dandapani for test parameters including increase in test vectors for both cross-point and single stuck-at faults, fault coverage, and time taken for fault detecti... View full abstract»

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  • Testability and test architectures

    Publication Year: 1988, Page(s):161 - 166
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (466 KB)

    The authors define testability and describe the benefits derived from its inclusion in products. Myths about testability are presented. Test architectures that help to maximize the chances of successfully achieving test goals while minimizing hardware and software costs are described.<> View full abstract»

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  • Computer-aided evaluation of satellite networks in hostile environments

    Publication Year: 1988, Page(s):172 - 176
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    A geometric computer model which places satellites in either low-Earth or geosynchronous orbits is described. The model is used in conjunction with table lookup and interpolation from performance characteristics of spread-spectrum multiple-access communications schemes to determine link and end-to-end performance of satellite communications networks in hostile environments. The program is implemen... View full abstract»

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  • A performance comparison of optimum and sub-optimum receiver structures for rate-line detection of digitally modulated carriers

    Publication Year: 1988, Page(s):177 - 181
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (315 KB)

    An optimum receiver structure for the detection of the symbol rate of a digitally modulated carrier is investigated for rectangular and Nyquist pulse shapes. The resulting receiver structure forms a maximum-likelihood symbol rate estimator. The performance of this optimum receiver is compared with that of a delay-and-multiply receiver, which is known to be sub-optimum. The signal-to-noise ratio as... View full abstract»

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  • Modeling multiple access to a hard limiting direct-sequence spread spectrum satellite repeater using phasor analysis

    Publication Year: 1988, Page(s):182 - 186
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (275 KB)

    A model of direct-sequence spread-spectrum carriers accessing a limiting satellite repeater in the presence of strong interference (tone jamming, other users, and Gaussian noise) is presented. A simplified phasor analysis is used to obtain a strict upper bound on system bit error rate. Comparisons are made of the bit error rate for a limiting repeater system and that obtained for a linear repeater... View full abstract»

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  • Distortion weighted motion compensated image coding

    Publication Year: 1988, Page(s):192 - 196
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (266 KB)

    A surface distortion measure for a motion-compensated image-coding algorithm is described. The surface distortion measure (SDM) is a function of both the signal variance and the error variance. This functional relationship circumvents a major problem that is associated with using the ratio of these quantities as a quantizer design parameter. When the surface distortion measure is used as the fidel... View full abstract»

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  • Single board computer design based on an Intel 80186 high integration microprocessor

    Publication Year: 1988, Page(s):197 - 201
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    An outline is presented of the concepts and step-by-step approach used for the design of a single-board computer, the SBC-186, based on the Intel 80186 microprocessor. It was designed as a stand-alone system consisting of the processor and a terminal, and incorporates a variety of memory and input/output (I/O) options. A modular approach is used in presenting the SBC-186, breaking the overall syst... View full abstract»

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  • An IEEE-488 interface for the CRL-32A microcomputer

    Publication Year: 1988, Page(s):202 - 205
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (258 KB)

    A general-purpose input/output (I/O) interface card, which includes an IEEE-488 bus, a parallel printer, and RS-232-C interfacing circuits, was designed and constructed. This interface card was designed to expand the present I/O communication capability of the main single-board computer CRL-32A. The design of the IEEE-488 bus interface was emphasized. The I/O support routines for the three types o... View full abstract»

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