IEEE International Symposium on Circuits and Systems

1-3 May 1990

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Displaying Results 1 - 25 of 820
  • A 5 ns 1 Mb BiCMOS SRAM with ECL I/O interface

    Publication Year: 1990, Page(s):1995 - 1998 vol.3
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (427 KB)

    A high-speed X-address decoding scheme with wired-OR bipolar predecoders and partial decoding level converters is presented. In addition, a sensing scheme with small signal voltage swing (particularly for read bus lines) is described. These two high-speed schemes and a double-level polysilicon layer, double-level metal layer, 0.8- mu m BiCMOS process technology were used to implement a 5-ns addres... View full abstract»

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  • Filter banks for analysis-reconstruction systems: a tutorial

    Publication Year: 1990, Page(s):1999 - 2003 vol.3
    Cited by:  Papers (4)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (569 KB)

    The problems and issues that arise in systems based on analysis/synthesis filter banks are discussed. A historical perspective of advances made in the development of systems and in the understanding of the problem is presented. The authors define the general system-design problem for one and two dimensions and highlight some of the major contributions to this area over the past 15 yr, beginning wi... View full abstract»

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  • Realization of Boolean functions by perceptron algorithm

    Publication Year: 1990, Page(s):704 - 705 vol.1
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (103 KB)

    Summary form only given. A two-step design procedure is proposed so that any Boolean function can be realized by the reliable perceptron algorithm. The first step is the learning phase. In the second step, the outputs are simply connected to an OR-gate, a perceptron by itself.<> View full abstract»

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  • A first-order current-steering sigma-delta modulator

    Publication Year: 1990
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (28 KB)

    Summary form only given, as follows. A new architecture is presented for a first-order sigma-delta modulator. The system can operate at a high sampling frequency, can be used as a building block for higher-order modulators, and employs circuit techniques that are largely technology-independent. The system was realized in a 2- mu m n-well, double-metal single-poly CMOS technology. The circuit occup... View full abstract»

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  • A tutorial discussion of the oversampling method for A/D and D/A conversion

    Publication Year: 1990, Page(s):910 - 913 vol.2
    Cited by:  Papers (14)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (326 KB)

    Oversampling A/D and D/A conversion is discussed with emphasis on sigma-delta structures. Oversampling A/D converters modulate their analog inputs into short digital words at a very high sampling rate. Decimation filters resample this code at the Nyquist rate of the signal and increase the word length to maintain resolution. At the D/A, interpolating filters increase the word rate of the digital c... View full abstract»

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  • Recent developments in high speed heterojunction devices: a tutorial

    Publication Year: 1990, Page(s):2532 - 2537 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (648 KB)

    Some high-speed heterojunction devices and concepts are discussed. The principles of operation of MODFETs are examined, and a few devices using MODFETs are presented. The advantages of heterojunction bipolar transistors (HBTs) are described, and HBT devices are discussed in detail.<> View full abstract»

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  • Adaptive forward-backward filtering of images

    Publication Year: 1990, Page(s):3134 - 3137 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (516 KB)

    An adaptive forward-backward filtering method for image enhancement based on the two-dimensional Bayesian estimate of images is presented. As the steady-state gain can be preevaluated, this algorithm is fast and simple. An example shows that this filtering is better than the two-dimensional Bayesian estimate in smoothing noise and preserving the details of images.<> View full abstract»

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  • Dynamic range of finite-precision recursive QRD LS algorithm and its stability

    Publication Year: 1990, Page(s):3142 - 3145 vol.4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (337 KB)

    It is observed that the cosine parameters generated by boundary cells will eventually reach quasi-steady-state if lambda is close to one. It is shown that the quasi-steady-state and ensemble values of sine and cosine parameters are the same for all boundary cells. It is independent of the statistics of the input data sequence and the position of the boundary cell which generates the sine and cosin... View full abstract»

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  • 1990 IEEE International Symposium on Circuits and Systems (Cat. No.90CH2868-8)

    Publication Year: 1990
    Request permission for commercial reuse | |PDF file iconPDF (14 KB)
    Freely Available from IEEE
  • HDTV/standard-TV compatible coding based on DCT

    Publication Year: 1990, Page(s):1895 - 1898 vol.3
    Cited by:  Papers (4)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (216 KB)

    A compatible coding system for 1125-line, 60-Hz HDTV and 525-line, 60-Hz standard TV is presented. This system allows an HDTV signal to be transmitted at about 140 Mb/s. From the coded HDTV signal, a standard TV signal as well as the HDTV signal can be easily decoded. The coding algorithm uses adaptive intrafield/interframe discrete cosine transform (DCT) coding in which only low-frequency compone... View full abstract»

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  • Two dimensional space segmentation recursive filtering algorithm on rectangular processor array

    Publication Year: 1990, Page(s):1015 - 1018 vol.2
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (336 KB)

    The method of parallel processing for two-dimensional recursive filters on multiprocessor systems is studied. Recursive filtering is sequential and global. The global processing is decomposed into space segmentation processing with a few global communications. An efficient hardware algorithm for two-dimensional recursive filtering is derived using Roeser's model, and the speedup rate, efficiency, ... View full abstract»

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  • Linearization of a sigma-delta modulator by a proper loop delay

    Publication Year: 1990, Page(s):364 - 367 vol.1
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (260 KB)

    The influence of a loop delay on the effective transfer characteristic of the quantizer and on the linearity of a first-order sigma-delta modulator is investigated. It is shown that the idle channel noise (ICN) of a first-order sigma-delta modulator acts as a dither signal and linearizes the transfer characteristic of the 1-bit quantizer. The ICN depends on the loop delay Tdl (... View full abstract»

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  • An overview of BiCMOS technology and applications

    Publication Year: 1990, Page(s):1967 - 1970 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (408 KB)

    BiCMOS technology significantly enhances speed performance while incurring a negligible power or area penalty. BiCMOS can therefore provide applications with CMOS power and densities at speeds which were previously the exclusive domain of bipolar. This has been demonstrated in applications ranging from static RAMs to gate arrays to microprocessors. Thus, the concept of a system on a chip becomes a... View full abstract»

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  • Time-domain reactive power concepts for nonlinear, nonsinusoidal or nonperiodic networks

    Publication Year: 1990, Page(s):387 - 390 vol.1
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (200 KB)

    Two methods for extending the definition of reactive power beyond the sinusoidal steady state are presented. Reactive power concepts are created that can be useful in the state-space analysis of nonlinear or nonperiodic systems. All definitions and results are given purely in the time domain without using Fourier analysis or other orthogonal function expansions View full abstract»

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  • Analysis and synthesis of a class of discrete-time neural networks described on hypercubes

    Publication Year: 1990, Page(s):700 - 703 vol.1
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (364 KB)

    The qualitative properties of neural networks described by a system of first-order linear ordinary difference equations which are defined on a closed hypercube of the state space with solutions extended to the boundary of the hypercube are investigated. The class of systems considered can easily be implemented in digital hardware. When implemented by a serial processor (e.g., in digital simulation... View full abstract»

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  • Seismic inversion by the combined use of predictive and semblance techniques

    Publication Year: 1990, Page(s):1011 - 1014 vol.2
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (260 KB)

    The combination of predictive and semblance methods is the basis of several techniques of seismic inversion. A method for estimating the velocities of the compressional, shear, and Stoneley waves is proposed and applied to synthetic cases. The results obtained with eight of them are summarized and are quite satisfactory. The number of receivers in all the cases considered is eight, and the distanc... View full abstract»

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  • Generation of rectangular duals of a planar triangulated graph by elementary transformations

    Publication Year: 1990, Page(s):2857 - 2860 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (412 KB)

    In the rectangular dual approach to the floorplan design, it is important to incorporate efficient rectangular dual transformation techniques in the iterative optimal-search algorithms. A solution to the rectangular dual transformation problem by directly using the properties of oriented graphs is proposed. The definitions of elementary components and elementary transformation are given. It is sho... View full abstract»

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  • Algorithm transformations for unlimited parallelism

    Publication Year: 1990, Page(s):1756 - 1759 vol.3
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (428 KB)

    A unified algebraic basis for transforming algorithms to achieve unlimited parallelism is provided. In the case of recursive algorithms, a certain class of algebraic structures is shown to be sufficient for the application of the look-ahead computation. This approach is generalized to matrix-based algorithms where the operations form a semiring. Previously known approaches to speeding up recursion... View full abstract»

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  • On nonessential singularities of the second kind in T2U for 3-D digital filters

    Publication Year: 1990, Page(s):3002 - 3004 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (144 KB)

    The problems of linear form nonessential singularities of the second kind in T2U for three-dimensional digital filters are discussed. Based on the Weierstrass theorem of multidimensional complex analysis, the existence criteria are obtained. Some basic properties for these kinds of singularities are presented View full abstract»

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  • Efficient emulation of neural networks on concurrent architectures for optimization problems

    Publication Year: 1990, Page(s):1875 - 1878 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (328 KB)

    Specific optimization problems can be solved with high efficiency by neural network models, due to their intrinsic massive parallelism. The emulation of neural algorithms on concurrent architectures can preserve their computational power. The authors illustrate and discuss the implementation of Hopfield networks for the solution of the traveling salesman problem on 2-D meshes of transputers. The i... View full abstract»

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  • Dynamic circuit restructuring for hierarchical waveform relaxation

    Publication Year: 1990, Page(s):519 - 522 vol.1
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (332 KB)

    A dynamic restructuring method for hierarchical-waveform-relaxation-based circuit analysis is presented. The proposed algorithm is used to dynamically repartition and relevelize the circuit structure during the simulation run in order to achieve faster convergence of the nodal voltage waveforms. Results obtained from analysis of strongly coupled circuits show a factor of 5-10 times speed improveme... View full abstract»

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  • New general nonlinear representations for system operators

    Publication Year: 1990, Page(s):384 - 386 vol.1
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (188 KB)

    A representation for nonlinear system operators is proposed by considering a nonlinear dynamic system as a continuous time-dependent functional for causal signals. The representation is based on a Gaussian-type kernel functional and is suitable for some special purposes such as nonlinear system identification, pattern recognition, nonlinear estimation, and signal processing. It is proved that the ... View full abstract»

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  • FIR filtering using vector transformation and convolution processor

    Publication Year: 1990, Page(s):1223 - 1226 vol.2
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (264 KB)

    In many signal processing applications, finite impulse response (FIR) filters with long coefficient sequences (more than a thousand coefficients) are required. To achieve high-speed operation, dedicated convolution processors have been used for FIR filtering. However, the number of coefficients that a single convolution processor chip can handle is relatively small, compared with the number of coe... View full abstract»

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  • Photonic neurocomputers and learning machines

    Publication Year: 1990, Page(s):696 - 699 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (380 KB)

    Efforts and progress made towards achieving desirable attributes in analog photonic (optoelectronic and/or electron optical) hardware that utilizes primarily incoherent light are reviewed. A hardware implementation of a stochastic Boltzmann learning machine is used as a vehicle for identifying generic issues and clarifying research and development areas for further advancement of the field. The de... View full abstract»

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  • Finite series solution for loaded uniform RC lines

    Publication Year: 1990, Page(s):2381 - 2384 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (284 KB)

    The time-domain voltage step response of a loaded uniform RC line is derived in the form of a finite series. The locations of the poles are expressed as a function of the load parameters, yielding an approximate closed-form solution. Expressions for the delay time of RC lines are obtained. These apply to the cases of resistive, capacitive, and parallel R-C load... View full abstract»

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