Proceedings of the IEEE

Issue 5 • May 1975

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Displaying Results 1 - 22 of 22
  • [Front cover and table of contents]

    Publication Year: 1975, Page(s): c1
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  • Scanning the issue

    Publication Year: 1975, Page(s): 739
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  • Physical limits in digital electronics

    Publication Year: 1975, Page(s):740 - 767
    Cited by:  Papers (183)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (3119 KB)

    Miniaturization has steadily increased the economic usefulness of digital electronics through the past two decades. A variety of physical arguments are brought to bear on the question of how far miniaturization can be extended. The implications of the laws of quantum mechanics and thermodynamics for information storage are examined. The need for power dissipation in electrical information processi... View full abstract»

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  • Side force in coil-sheet magnetic levitation systems

    Publication Year: 1975, Page(s):768 - 776
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (847 KB)

    A Fourier transform technique is used to evaluate the forces on planar polygonal dc current coils moving parallel with a conducting sheet as applied to the magnetic levitation of high-speed ground vehicles. In addition to the lift and drag forces usually discussed, a side force may exist if the current coils are asymmetric with respect to the direction of vehicle motion. For some geometrically sym... View full abstract»

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  • A review of ferrites for microwave applications

    Publication Year: 1975, Page(s):777 - 789
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1410 KB)

    Ferrimagnetic materials for microwave applications are reviewed with emphasis on the more recent advances. Specific areas of discussion include temperature sensitivity of the magnetization, microwave loss phenomena and the concept of effective linewidth, and the hysteresis loop in terms of the factors which influence its coercive force, remanence ratio, and stress sensitivity. The relations betwee... View full abstract»

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  • Laser irradiance propagation in turbulent media

    Publication Year: 1975, Page(s):790 - 811
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2129 KB)

    The results obtained in recent years on laser irradiance propagation in random weakly inhomogeneous media with large scale index of refraction fluctuations are reviewed. Of particular concern are the problems of the cozrelation theory of fluctuations of irradiance propagating over large distances, where the effects of multiple scattering are greatly pronounced. Much attention is paid to the result... View full abstract»

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  • Radar-range equation

    Publication Year: 1975, Page(s):813 - 814
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (242 KB)

    The radar-range equation, if not carefully applied, will indicate that power returned from corner-cube reflectors various as the inverse fourth power of the range. Careful attention to the meaning of each team in the equation leads to an inverse second-power relationship. This result is confirmed by analysis according to geometric optics. View full abstract»

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  • Selectivity measures of second-order networks

    Publication Year: 1975, Page(s):814 - 815
    Cited by:  Papers (1)
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    The utility of gain-slope definitions in assessing the selectivity performance of various second-order transfer functions is investigated and their suitability for describing notch functions alone demonstrated. View full abstract»

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  • Chebyshev approximation for distributed RC networks

    Publication Year: 1975, Page(s):815 - 817
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (232 KB)

    It is shown that a uniformly distributed line may be approximated using Chebyshev polynomials of the first kind. A small number of terms being sufficient to obtain a good amplitude and phase approximation, and hence the method should prove useful both in the analysis and synthesis of uniform and tapered distributed RC networks. View full abstract»

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  • Comments on "On the construction of Gaussian quadrature rules for inverting the Laplace transform"

    Publication Year: 1975, Page(s):817 - 818
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    An algorithm for the construction of an inversion formula of the Laplace transform is tested critically. The formula itself is compared with another approximate inversion method. View full abstract»

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  • Evaluation of an analytical function of a companion matrix with multiple eigenvalues

    Publication Year: 1975, Page(s):818 - 820
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (293 KB)

    An analytical function of a companion matrix with multiple eigenvalues is expressed as the linear combination of constituent matrices. It is found that the constituent matrix is simply the product of the two matrices whine elements are part of the entries of Vandermonde matrix and its inverse. Calculation of these values is given as simple, explicit, and recunent formulas, and is very useful for b... View full abstract»

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  • A back-matched delay-line clipping technique for use with fast amplifiers

    Publication Year: 1975, Page(s): 820
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (147 KB)

    A modified delay-line clipping amplifier technique which overcomes the drift and low-frequency noise problems of conventional dc-coupled pulse amplifiers is proposed. This technique results in an amplifier system with low output reflection coefficient and excellent overload recovery characteristics. View full abstract»

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  • A Ka-band avalanche-diode up-converter

    Publication Year: 1975, Page(s):820 - 822
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (278 KB)

    Operation of a silicon avalanche-diode up-converter with output frequency at 35 GHz is reported. This was done by superimposing the input signal on the dc bias while providing the diode with the LO signal. Up-conversion was achieved with about 0-dB conversion loss and output power up to 200 mW. The influence of dc bias and input frequency level is considered; the bandwidth is also shown. View full abstract»

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  • Charge-coupled device (CCD) analog signal processing

    Publication Year: 1975, Page(s):822 - 823
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (210 KB)

    Analog charge-coupled devices and sampled data filtering have developed into mature disciplines. Each discipline offers the other wide systems advantages where alone it would be impractical. This letter explores these advantages in a number of implementations against the scale of wide low-cost applications. View full abstract»

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  • Optimum Schottky-barrier height for high-efficiency microwave transferred-electron diodes

    Publication Year: 1975, Page(s):823 - 824
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (248 KB)

    Optimum Schottky-barrier heights are given to make high-efficiency GaAs and InP tnmferred-electron diodes by injecting electrons directly into the upper valley from cathode contact. View full abstract»

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  • Effects of tunneling on high-efficiency IMPATT avalanche diodes

    Publication Year: 1975, Page(s):824 - 826
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (329 KB)

    A theoretical and experimental study is presented of the effects of tunnel injection on high-efficiency IMPATT avalanche diodes characterized by a high low-doping profile. Some characteristics usually observed in such high-efficiency IMPATT oscillators are explained, taking into account the effects of tunneling. View full abstract»

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  • Experimental realization of floating-gate-memory thin-film transistor

    Publication Year: 1975, Page(s):826 - 827
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (267 KB)

    CdSe thin-film nonvolatile memory transistors have been made using the concept of a double-insulator structure with a thin floating gate inserted at the interface of the two insulators. The thin floating gate enhanced the charging and charge-retention behaviors of the memory transistors. On/off conductance ratio of greater than 1000 has been achieved. Writing speed on the order of microseconds is ... View full abstract»

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  • A simple method of bipolar transistor field factor measurement

    Publication Year: 1975, Page(s):828 - 829
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (255 KB)

    A method of bipolar transistor field factor measurement is described. The method is based on the measurement of the open-circuit voltage between the collector-base terminals when a forward bias voltage is applied across the emitter-base terminals. The theory and the experimental measurement on different transistor types are presented. View full abstract»

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  • A brief review of some applications of coherent optical processing to image improvement

    Publication Year: 1975, Page(s):829 - 830
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (271 KB)

    A guide is given to some recent literature on some new advances in the application of holographic correlative and convolutive picture processing, including image improvement in high-resolution electron microscopy and holographic fingerprint identification. It is intended to supplement Vander Lugt's recent review of coherent optical processing [1]. View full abstract»

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  • Sampling rate selection for a digital matched filter

    Publication Year: 1975, Page(s):830 - 831
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (215 KB)

    The problem of selecting the sampling rate for the digital implementation of a matched filter for noncoherent digital communications is considered. The effects of bandwidth reduction and sampling are evaluated. A Nyquist rate of 8 samples per bit is found to be the critical value even with respect to the dependence on the carrier phase. View full abstract»

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  • A high-efficiency granule microphone using Se-Te alloys

    Publication Year: 1975, Page(s):831 - 832
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (171 KB)

    As a new material for the conventional granule-type micro phone utilizing carbon, selenium-tellurium alloy is proposed. This alloy granule microphone is characterized by high voltage sensitivity, low dc feed current, and, especially, small distortion. View full abstract»

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  • [Back cover]

    Publication Year: 1975, Page(s): c4
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H. Joel Trussell
North Carolina State University