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Circuits and Systems, 1990., Proceedings of the 33rd Midwest Symposium on

Date 12-14 Aug. 1990

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Displaying Results 1 - 25 of 308
  • Proceedings of the 33rd Midwest Symposium on Circuits and Systems (Cat. No.90CH2819-1)

    Publication Year: 1990
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  • A knowledge engineering tool for load forecasting

    Publication Year: 1990, Page(s):144 - 147 vol.1
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (365 KB)

    A description is given of a knowledge engineering tool for short-term load forecasting to be used as an aid in operation and planning of a distribution system. This engineering tool is composed of two parts. First, an artificial neural network is trained to produce the first evaluation of a forecasted load. Then, a fuzzy expert system manipulates actual and forecasted values of real power and weat... View full abstract»

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  • State assignment for asynchronous state machines

    Publication Year: 1990, Page(s):1123 - 1126 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    A state assignment method is described for asynchronous circuits based on simulated annealing that produces race-free multiple transition time assignments. Simulated annealing is used to obtain a good initial assignment. An algorithmic cleanup procedure is used to guarantee that each state transition is race free. The user is allowed to specify timing constraints on the resulting logic, which infl... View full abstract»

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  • A microprocessor platform for a generic protection system

    Publication Year: 1990, Page(s):377 - 380 vol.1
    Cited by:  Papers (2)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    An investigation is made of a particular microprocessor board arrangement which serves as the base for a variety of power system protection devices. It calculates the first 15 harmonic components of up to 9 nominal power frequency inputs and updates these harmonics every 2 ms. It dynamically tracks the fundamental frequency and alters the sampling rate to remain at 32 per fundamental cycle. The ha... View full abstract»

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  • Convergence analysis of adaptive bandpass/notch filters with colored noisy signal

    Publication Year: 1990, Page(s):560 - 563 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    A method to obtain the convergence speed of adaptive bandpass/notch filters is proposed. The basic idea is the integration of the average step size for a coefficient update algorithm. The adaptive detection of a sinusoid with additive Gaussian noise has been investigated. It is shown that for white Gaussian noise, the convergence speed of bandpass and notch filters is the same and does not depend ... View full abstract»

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  • Vector field analysis of single layer feedback neural networks

    Publication Year: 1990, Page(s):21 - 24 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    The vector field method of analysis of single-layer neural networks with feedback is presented. The method allows the generation of trajectories in En space. The trajectories provide complete dynamical solutions for all possible initial conditions, finite gain values of neurons, and parasitic conductances and capacitances which occur in actual electronic neural systems View full abstract»

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  • A fast computer algorithm for the generation of disjoint cubes for completely and incompletely specified Boolean functions

    Publication Year: 1990, Page(s):1119 - 1122 vol.2
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    An algorithm is presented that generates an array of disjoint cubes describing completely and incompletely specified Boolean functions. A peculiar feature of the algorithm, which speeds up its execution, is that in comparison to known algorithms it minimizes the number of usages of cube calculus operations. Pointer structures and array allocations of the C language are effectively used in its impl... View full abstract»

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  • A device for testing power system stabilizer parameters on-line

    Publication Year: 1990, Page(s):374 - 376 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    A brief description is given of test equipment that was developed to yield transfer functions directly for control elements that are operating on-line or isolated from the system. Test results are given to illustrate the application of this technique to measuring the parameters of a power system stabilizer (PSS). This same concept has been used to obtain AVR, turbine, and penstock transfer functio... View full abstract»

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  • Single amplifier RC network realizing a 3rd-order notch function

    Publication Year: 1990, Page(s):468 - 471 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    The realization procedure of a third-order low-pass notch section with a single amplifier RC network is proposed. The basic idea employed is the impedance scaling technique. The design method described has been experimentally confirmed View full abstract»

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  • Decoding a class of nonbinary codes using neural networks

    Publication Year: 1990, Page(s):41 - 43 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    A method for decoding RS (Reed Solomon) codes which used fixed decoding time and does not depend upon the number of errors present in messages is presented. The method is much simpler compared to existing decoding algorithms for RS codes. However, for large values of p (where p⩾0.2), the performance degrades significantly because for large noise levels the improvement obtaine... View full abstract»

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  • A Schur algorithm for strongly regular Toeplitz-plus-Hankel matrices

    Publication Year: 1990, Page(s):556 - 559 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    A Levinson-Durbin-type algorithm to solve Toeplitz-plus-Hankel systems of equations due to G. Heinig et al. (1988) is used to induce a Schur-type algorithm for such systems via the method in C.J. Zarowski. The resulting algorithm is believed to be new, and not to have been derived by any other means before View full abstract»

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  • A localized learning rule for analog VLSI implementation of neural networks

    Publication Year: 1990, Page(s):17 - 20 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    A modified Hebbian type learning rule for self-organization which uses only the local information is proposed. As the result of computer simulations of self-organizing networks, the validity of the rule was confirmed and learning speed was improved. Furthermore, circuit examples for implementing the learning rule are proposed View full abstract»

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  • An artificial intelligence approach to the behavioral modeling of asynchronous sequential logic circuits

    Publication Year: 1990, Page(s):1115 - 1118 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A method has been developed which uses artificial intelligence techniques to model the functional behaviour of asynchronous sequential logic circuits (ASLCs). It provides a highly structured, interactive approach. The domain representation, production rules, and control strategy are described. The behavioural descriptor of the ASLC design automation system generates a primitive flow table which ca... View full abstract»

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  • Knowledge based extension of DIADES system for the analysis and synthesis of TGC circuits

    Publication Year: 1990, Page(s):989 - 992 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A new and uniform approach to the computer-aided analysis and synthesis of analog circuits is presented. The system is specialized for transconductance-grounded capacitance circuits (TGC). The analysis is a transformation from a signal flow graph (SFG) to a transfer function (TF). It is based on a step-by-step transformation from SFG to TF by reductions of nodes: summation, multiplication, and fee... View full abstract»

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  • Simulation of B-H excursions for transient studies [transformer cores]

    Publication Year: 1990, Page(s):370 - 373 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    The authors present an accurate but simple model for representing the core loss and flux excursions in transformer cores during transients. The model is based on the non-integer-power series in flux density representations of the magnetization characteristic. The results obtained from the model show good agreement with reported experimental investigations View full abstract»

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  • A crosstalk tolerant latch circuit design

    Publication Year: 1990, Page(s):653 - 656 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    A D-latch sequential circuit design is presented that exhibits an elevated degree of tolerance to common and differential mode noise in the clock lines. The circuit tolerates noise voltages in the clock signals in the range of or even higher than ±Vdd, becoming under specific conditions a dynamic latch preserving the system from the propagation of unknown quality information. The... View full abstract»

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  • FDDI protocols optimized for real time and packet data transmission

    Publication Year: 1990, Page(s):464 - 467 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The high performance protocol of the fiber data distributed interface-hybrid ring control (FDDI-HRC) is discussed to show its strengths and weakness with regard to the task of concurrently meeting the needs of real-time and packet data applications. The random allocation and de-allocation of isochronous bandwidth (the bandwidth allocated to real-time applications) in an FDDI-HRC system could cause... View full abstract»

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  • Hysteresis turn-on-off voltages for a neural-type cell

    Publication Year: 1990, Page(s):37 - 40 vol.1
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    Bounds on the range of input voltages which lead to hysteresis in a neural-type cell are presented. These are important to the field of neural-type networks which operate on pulses, as do biological ones, since the presence of hysteresis allows for coding of the pulses. Since design equations have not been readily available for NTCs (neural-type cells), the authors formulate equations for V1l... View full abstract»

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  • A new approach to series compensation of control systems

    Publication Year: 1990, Page(s):54 - 59 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The specification problem is re-examined for a realistic fixed plant with 1-zero and 4-poles. A new concept is introduced, which is the required horizontal symmetrical (α, 1/α) band of minus one slop (BMOS) around magnitude equals unity on a straight-line Bode plot. With these results, series compensation becomes a very simple graphical problem of moving straight lines around, where th... View full abstract»

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  • Structured analysis for neural networks using Petri nets

    Publication Year: 1990, Page(s):770 - 773 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    A neural Petri net model examining the dynamic and parallel activities of the neurons is presented. The structural and behavioral properties of the neuron can be studied in some detail using Petri nets. The advantage of this model over the ones in the current literature is that, it uses less parameters, hence it reduces the overall computation complexity of the model. Examples are given illustrati... View full abstract»

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  • An approach toward multi-coupled oscillators

    Publication Year: 1990, Page(s):898 - 901 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    Consideration is given to a coupled system of a binary input-output version of relaxation oscillators. If the number of the oscillators is n, the circuit dynamics is described by n -dimensional linear equations which are connected to each other by hysteresis switchings, and the switching time is given explicitly. In the case of n=2, a one-dimensional return map can be ob... View full abstract»

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  • Performance analysis of an efficient AIFIR echo-tail canceller

    Publication Year: 1990, Page(s):552 - 555 vol.1
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    A computationally efficient two-stage echo canceller is proposed. The first stage is a direct form adaptive FIR filter to cancel the main part of the echo response. The second stage cancels the `tail' part of the echo response. The proposed tail canceller is an adaptive version of the interpolated FIR (IFIR) filter. It is shown that the two-stage canceller meets the 60 dB echo cancellation accurac... View full abstract»

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  • A new gradient algorithm for FIR adaptive digital filters using multirate technique

    Publication Year: 1990, Page(s):13 - 16 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A new structure using a multirate technique for FIR adaptive digital filters (ADFs) is proposed. The convergence of the proposed ADF is accelerated in proportion to the increase of sampling rate while the minimum MSE and the optimum weights of the proposed ADF are constant values regardless of the sampling rate. The simulation results show the improvement in performance that can be achieved with t... View full abstract»

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  • Modeling and simulation of the indoor communication channel

    Publication Year: 1990, Page(s):408 - 410 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    A linear model of the indoor communication and the associated impulse response as invariant under time translations is considered. The fully three-dimensional channel simulator developed evaluates the power losses in a building as a function of the TX-RX separation. For a given floor, once the antenna heights are chosen and the nature, orientation and heights of the walls are... View full abstract»

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  • Estimation of circular arcs using an L1 estimator in combination with the Hough transform

    Publication Year: 1990, Page(s):1146 - 1149 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    The accurate parametrization of the shapes within an image is a necessary requirement in many image processing applications including sorting, manufacturing, and quality control. As the adoption of image processing techniques increases, the need for accurate identification and definition of shapes and objects will undoubtedly increase. A technique is presented for the accurate determination of the... View full abstract»

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