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Circuits and Systems, 1993., Proceedings of the 36th Midwest Symposium on

Date 16-18 Aug. 1993

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Displaying Results 1 - 25 of 391
  • Diagnosability of discrete event systems and its applications to circuit testing

    Publication Year: 1993, Page(s):344 - 347 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (409 KB)

    As man-made systems become more and more complex, diagnostics of component failures is no longer an easy task that can be performed based on experience and intuition. Therefore, it is important to develop a systematic approach to diagnostic problems. Diagnostics can be done either on-line or off-line. By on-line diagnostics, we mean diagnostics performed while the system to be diagnosed is in norm... View full abstract»

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  • Proceedings of 36th Midwest Symposium on Circuits and Systems

    Publication Year: 1993
    Request permission for commercial reuse | PDF file iconPDF (111 KB)
    Freely Available from IEEE
  • Design of zero phase two-dimensional filters using multiplicative autoregressive models

    Publication Year: 1993, Page(s):276 - 279 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    Two-dimensional multiplicative autoregressive (2-D MAR) filter structures are a generalized form of factorizable 2-D ARMA models which allow for nonseparable filter supports. In this paper, the stability criteria for 2-D MAR filters and a simple method for stabilizing zero phase 2-D MAR filters are presented. Also, methods for designing and implementing 2-D MAR filters with full plane zero phase f... View full abstract»

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  • Model following adaptive control of engine speed in the presence of transient disturbances

    Publication Year: 1993, Page(s):661 - 664 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    This work deals with the control of engine speed systems that are subjected to unknown and time-varying external and load disturbances. A model following adaptive control algorithm is presented and an on-line estimation strategy based on the recursive maximum likelihood method for the system parameters is developed. The estimation strategy updates the system dynamics to the adaptive controller, th... View full abstract»

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  • Design and implementation of a digital control for a continuous time nonrecursive (FIR) filter, programmable in a digital way

    Publication Year: 1993, Page(s):280 - 283 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    In this paper we show the implementation of a digital control interface oriented to work in a microprocessor environment like Personal Computers, using VLSI Altera chip and standard circuits to generate the voltages that a continuous-time nonrecursive FIR filter needs to fix its coefficients in order to be closed to a specific response. Also we show an algorithm approach based on the LMS technique... View full abstract»

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  • A new approach to the nodal analysis of switched-capacitor networks

    Publication Year: 1993, Page(s):915 - 917 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    A new Z-domain linked-capacitance circuit model for switched-capacitors is presented with rigorous mathematical derivation and physical explanation. An efficient technique for nodal analysis of switched-capacitor networks (SCN) based on the model is described. The size of the equations is the minimum for a SCN, which reduces computation requirement substantially. The technique is easy to implement... View full abstract»

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  • Circuit analysis software testing

    Publication Year: 1993, Page(s):665 - 668 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Before introducing new circuit analysis software packages into design courses, it is advisable to verify their quality and limitations. The market is currently supplied with several popular and inexpensive, sometimes public domain, software packages allowing analysis of relatively complex circuits. The popular analysis tools applied in introductory and advanced courses of electronic circuit analys... View full abstract»

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  • A single chip high-speed M-to-B arbiter for multiple bus multiprocessor systems

    Publication Year: 1993, Page(s):284 - 287 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    An M-user B-server synchronous arbitration circuit is built on a single chip using NMOS technology. The VLSI layout is modular which consists of 3 basic blocks: Type-1, Type-2, and Type-3. For VLSI layout of each block, one has to perform a few interconnections in order to build M-user B-server arbiter on a single chip. We have justified this statement by building arbiters for 16-user 4-server, 4-... View full abstract»

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  • Training of feedforward artificial neural networks using selective updating

    Publication Year: 1993, Page(s):1189 - 1192 vol.2
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    A new training method for feedforward neural networks is presented which exploits results from matrix perturbation theory for significant training time improvement. This theory is used to assess the effect of a particular training pattern on the weight estimates prior to its inclusion in any iteration. Data which do not significantly change the weights are not used in that iteration obviating the ... View full abstract»

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  • Modeling of dynamic systems using fuzzy logic

    Publication Year: 1993, Page(s):506 - 509 vol.1
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    An algorithm for modeling a dynamic system using fuzzy logic is developed in this paper. By properly partitioning the input-output spaces into fuzzy spaces, we use a machine learning algorithm to generate an initial fuzzy rule base. Finally, we adjust membership functions to minimize the output error between the model and the physical system. Simulation results are also given to demonstrate the pr... View full abstract»

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  • A cache coherency scheme for an asynchronous packet-switched shared memory multiprocessor

    Publication Year: 1993, Page(s):173 - 176 vol.1
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    This paper analyses the problems encountered in designing a bus-based cache coherence protocol for an asynchronous packet switched multiprocessor system having private caches for each processor and describes such an implementation, showing the algorithm used in maintaining cache coherency. Multiple copies of the data are allowed to exist. Since there is no directory that keeps track of all the pro... View full abstract»

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  • A switched-capacitor differencing circuit with common-mode rejection for fully differential comparators

    Publication Year: 1993, Page(s):911 - 914 vol.2
    Cited by:  Papers (5)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A switched-capacitor differencing circuit for use in fully differential comparators is described. The circuit subtracts a differential reference from a differential input and provides common-mode rejection, potentially saving power dissipation and die area by simplifying the design of the rest of the comparator View full abstract»

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  • Coherent grouping of power systems for use in training artificial neural networks

    Publication Year: 1993, Page(s):704 - 707 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    This paper presents a methodology for applying artificial neural networks to power systems of various sizes while addressing the problem of increasing training set size with increasing power system size. A slow-coherency based network partitioning technique is used to group the generators and load buses of the 10-machine, 39-bus system into coherent areas. Next we use characteristic parameters of ... View full abstract»

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  • Ultrasound image processing

    Publication Year: 1993, Page(s):100 - 102 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    The images generated from ultrasound pulse-echo signals have long been used to aid in clinical diagnosis. In this paper a new data processing technique, called the inversion algorithm, is proposed in order to produce an undistorted, high resolution and low noise image of tissue View full abstract»

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  • Integration of EDA tools into the computer engineering curriculum

    Publication Year: 1993, Page(s):669 - 672 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    This paper describes our philosophy and modus operandi in developing the design component of our computer engineering curriculum at the University of Notre Dame around a powerful set of electronic design automation tools. It describes the transition from the use of point tools on several computer platforms to the use of Mentor Graphics integrated EDA tools on SPARC workstations, and illustrates th... View full abstract»

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  • A sampled-data motion chip

    Publication Year: 1993, Page(s):288 - 291 vol.1
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    An analog CMOS VLSI prototype for a visual motion detector was fabricated and tested. This 1-D implementation computes image displacement from a fixed reference point and is suitable for eventual inclusion in an image stabilization system. The chip uses a correlation-based algorithm similar to that proposed by Reichardt (1961) View full abstract»

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  • Low cost ANN system based on TDM approach

    Publication Year: 1993, Page(s):1185 - 1188 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A general purpose low cost hardware ANN system has been built. The hardware is based on MD1220 neural bit slice and PC/AT is used as the host computer for testing. Each MD1220 contains 8 binary neurons. In order to improve its connectivity and flexibility, time division multiplexing (TDM) is used. This approach can allow network reconfiguration for different architectures by simply changing the fi... View full abstract»

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  • A micropower battery-operated one-pin crystal oscillator

    Publication Year: 1993, Page(s):1382 - 1387 vol.2
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    This paper describes the theory and analysis of a CMOS one-pin crystal oscillator suited for battery operated devices. The oscillator uses only one package pin. No other external components other than the crystal itself are needed. The oscillator is intended to operate at 32 kHz with current consumption in the range of 200-250 nA and a single supply voltage of -1.5 V. Both theoretical analysis and... View full abstract»

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  • Validating the use of stochastic models for power electronic converters

    Publication Year: 1993, Page(s):1410 - 1413 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    One of the drawbacks of using averaging models in the analysis and design of power electronic systems has been the uncertainty in determining the stability of the system since these techniques necessitate a small-signal restriction and thus cannot account for nonlinearities. This paper addresses this problem. It presents the replacement of the averaging models by stochastic models. The stochastic ... View full abstract»

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  • Thermal-wave image processing for characterization of subsurface flaws in materials

    Publication Year: 1993, Page(s):1433 - 1435 vol.2
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    Infrared images resulting from back-scattered thermal waves in composite materials are corrupted by instrument noise and sample heat-spread function. This paper demonstrates that homomorphic deconvolution and “demultiplication” result in enhanced image quality for characterization of subsurface flaws in Kevlar and graphite composites. The choice of processing depends on material charac... View full abstract»

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  • Stability of IIR digital filters constructed with the time-domain pipelining technique

    Publication Year: 1993, Page(s):781 - 783 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    Previously, z-domain or scattered lookahead pipelined IIR filters were thought to offer reduced computational complexity when compared to time-domain or clustered look-ahead IIR pipelined filters. However, the minimum-order augmentation technique provided improved computational complexity by minimizing superfluous poles, at the expense of increased transfer function denominator multipliers. In thi... View full abstract»

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  • A fully digital self-calibration method for high resolution, pipelined A/D converters

    Publication Year: 1993, Page(s):228 - 231 vol.1
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    In highly accurate pipelined analog/digital converters, precise control of comparator trip-points, inter-stage amplifier gains and effective levels of reconstructing D/A converters is difficult. A new calibration approach allows errors on all these components, and compensates for them in the digital domain. A system identification technique using the converter itself, determines the required digit... View full abstract»

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  • Fuzzy system identification using rule-based models

    Publication Year: 1993, Page(s):510 - 513 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The purpose of the paper was to examine the methods used to develop fuzzy models of SISO systems which may be thought of as “rule-based” using non-recursive techniques. First, we look at the mathematical concepts used to develop the models. Second, special constraints used in the creation of the fuzzy models are specified. Third, fuzzy models of a simple linear system are developed. Th... View full abstract»

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  • Analysis and design of microwave T-junction circuits for prescribed response characteristics

    Publication Year: 1993, Page(s):604 - 607 vol.1
    Cited by:  Papers (4)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    The T-junction is a fundamental passive component in microwave and millimeter-wave monolithic circuits and the characterization of its transmission and reflection properties is a topic of considerable interest. The full-wave spectral domain analysis of Wu et al. (1990) has been applied to obtain the scattering parameters as a function of frequency for an uncompensated T and a shaped T (used as a b... View full abstract»

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  • A NN type multi-sensor tracking and identification algorithm

    Publication Year: 1993, Page(s):492 - 495 vol.1
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    A multiple dissimilar sensor multiple target tracking and identification algorithm in the spirit of the nearest neighbour (NN) class of assignment algorithms is proposed. The novelty of this work lies in the exploitation of information type Kalman filters and a coordinated approach to the treatment of both kinematic and non-kinematic properties View full abstract»

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