Proceedings of the IEEE

Issue 11 • Nov. 1975

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Displaying Results 1 - 25 of 28
  • [Front cover and table of contents]

    Publication Year: 1975, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1975, Page(s): 1539
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  • Experimental models for the evaluation of microwave biological effects

    Publication Year: 1975, Page(s):1540 - 1544
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (673 KB)

    The theoretical and empirical approaches to biological effects of microwaves are discussed. The bioeffects should be considered as a chain of events: primary interaction analyzed in terms of biophysics and early direct, early indirect, late (delayed) effects analyzed in terms of physiology. Thermal balance experiments are discussed pointing out the necessity to take unequal deep body heating by mi... View full abstract»

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  • Some cryptographic techniques for machine-to-machine data communications

    Publication Year: 1975, Page(s):1545 - 1554
    Cited by:  Papers (50)  |  Patents (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1116 KB)

    Some of the threats to the integrity of multiuser teleprocessing systems and to the data they contain can be countered by the use of cryptography. Stream-generator ciphers are not ideally suited for such an application, thus the use of block ciphers, which have the beneficial property of a strong nonlinear intersymbol dependence, is suggested. This property provides the means for automatic error d... View full abstract»

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  • Microprogramming—Another look at internal computer control

    Publication Year: 1975, Page(s):1554 - 1567
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1380 KB)

    The internal control of a computer is directed by the instruction. The instruction causes a sequence of steps (or microinstructions) to occur which interpret the instruction. This interpretation of an instruction can be implemented by a storage media called a control store. The programs written for this media are called microprograms. The recent availability of fast READ-WRITE bipolar storage medi... View full abstract»

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  • The technological requirements for power by fusion

    Publication Year: 1975, Page(s):1568 - 1608
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4455 KB)

    The major technological requirements for fusion power, as implied by current conceptual designs of fusion power plants, are elucidated and assessed. As the point of departure, the four fusion reactor concepts which have been most thoroughly considered in these design studies are described; they are the mirror, the theta-pinch, the tokamak, and the laser-pellet concepts. The required technology is ... View full abstract»

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  • On suboptimal linear system reduction

    Publication Year: 1975, Page(s):1610 - 1611
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (211 KB)

    A suboptimal linear system reduction algorithm which exploits Silverman's algorithm for constructing a minimal realization is presented. The proposed technique requires fewer memory locations than the existing technique for multi-input/multi-output system reduction. View full abstract»

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  • A counterexample to harmonic linearization

    Publication Year: 1975, Page(s): 1610
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (119 KB)

    A counterexample to harmonic linearization is discussed. View full abstract»

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  • A sine wave generator using a frequency-dependent negative conductance

    Publication Year: 1975, Page(s):1611 - 1612
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (198 KB)

    A realization of a variable frequency RC oscillator, using the concept of frequency-dependent negative conductance, is proposed, The frequency variation is obtained by controlling a single resistance in the network. View full abstract»

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  • Negative resistance in multiemitter transistors

    Publication Year: 1975, Page(s):1612 - 1613
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    Negative resistance has been observed in multiemitter transistors, between any two emitters. This negative resistance is due to lateral transistor action between these two emitters. Relevant theory and applications are discussed. View full abstract»

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  • A reliable fifteen-percent-efficiency Silicon double-drift-region IMPATT diode

    Publication Year: 1975, Page(s):1613 - 1615
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (337 KB)

    This letter describes the development of a medium-power high-efficiency high-reliability double-drift-region silicon IMPATT diode intended for use in telecommunication satellites at 11-13 GHz. The design is based on large-signal computer simulations. The highest efficiency obtained is 15.1 percent. A pilot reliability test has accumulated 7700 dc device hours at 270°C with no failures. During... View full abstract»

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  • Effect of heavier doped junction side on efficiency of Si IMPATT diodes

    Publication Year: 1975, Page(s):1615 - 1617
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    For n- and p-type Si IMPATT diodes, the effect of the doping profile of the heavier doped junction side was calculated in terms of the dc-to-RF efficiency. In p-type diodes, the electric field existing within this region leads to a decrease in efficiency. This effect is assumed to be one reason why the theoretically expected high efficiencies of these diodes have not been obtained experimentally. View full abstract»

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  • Compound barriers in thin oxide film diodes

    Publication Year: 1975, Page(s):1617 - 1618
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (271 KB)

    High-frequency reverse bias measurements are made on sandwiched evaporated oxide films of tungsten and molybdenum. The linearity of the capacitance-voltage pilot gives an indication of Schottky-type barrier. The intercept and the n values obtained from the plot are used to calculate the thickness of the space charge region. It is concluded that a compound barrier exists at the interface. View full abstract»

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  • Comments on "FIR digital filter design techniques using weighted Chebyshev approximation"

    Publication Year: 1975, Page(s):1618 - 1619
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (262 KB)

    The history of the FIR filter approximation problem, as recently presented by Rabiner, McClellan, and Parks, is deficient in some areas and misleading in others. Some corrections are suggested. In addition to a brief discussion of different approaches to the design of FIR digital filters, areas into which present methods can be readily extended are outlined. The relationship between the parks and ... View full abstract»

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  • Stabilization of MOS structures by Boron ion implantation

    Publication Year: 1975, Page(s):1619 - 1620
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (241 KB)

    Bias and temperature stress measurements have been used to study the effect of11B ion implantation into MOS structures. The boron energies were selected so that the projected range of the implanted distribution was approximately equal to the device oxide thickness. Boron ion doses ranged from 1011to 2 × 1012/cm2. The bias temperature stress consiste... View full abstract»

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  • Improved efficiency microwave BARITT oscillators by delayed injection

    Publication Year: 1975, Page(s):1620 - 1621
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (213 KB)

    A new microwave BARITT diode structure which utilizes an intentionally added retarding-field region is presented. By taking advantage of the carrier diffusion at low velocities in this region, the injected current is delayed relative to the ac voltage and improved efficiency diodes are obtained. Microwave CW oscillation at C band with efficiency of ∼4 percent has been realized. Although the ... View full abstract»

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  • Single-longitudinal-mode LiNdP4O12laser

    Publication Year: 1975, Page(s):1621 - 1622
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    Single-longitudinal-mode operation of a LiNdP4O12laser, pumped longitudinally with an argon laser, is reported. Single-frequency operation was obtained with a 0.3-mm-thick crystal using an etalon effect of crystal surfaces without any frequency selective device. View full abstract»

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  • The effective autocorrelation function of maximum entropy spectra

    Publication Year: 1975, Page(s):1622 - 1623
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    The technique and the relative advantages of maximum entropy spectrum analysis have been discussed by Burg [1], [2]. Evaluation of the inverse Fourier transform of the maximum entropy spectrum shows that this method does, indeed, correspond to a reasonable nonzero extension of the autocorrelation function. View full abstract»

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  • An alternate derivation of the maximum likelihood estimator of a covariance matrix

    Publication Year: 1975, Page(s):1623 - 1624
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (195 KB)

    An alternate derivation of the maximum likelihood estimator of a covariance matrix is given. The derivation is based upon the eigenvalue properties of the product of the inverse of the covariance matrix and the sample covariance matrix. View full abstract»

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  • A representation for band-limited functions

    Publication Year: 1975, Page(s):1624 - 1625
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    A representation for band-limited functions in terms of spherical Bessel functions is presented. Use is made of a polynomial approximation of the Fourier transform. Some examples are given to illustrate the procedure. View full abstract»

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  • Ambiguity function simulator

    Publication Year: 1975, Page(s):1625 - 1627
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (210 KB)

    It is shown that the magnitude of the ambiguity function can be easily displayed on a spectrum analyzer. The technique used employs delay lines operating only on the modulation waveform. Examples of measured ambiguity functions are given for FM sine waves. These results are shown to be in agreement with theory. View full abstract»

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  • Numerical inversion of multidimensional Laplace transform

    Publication Year: 1975, Page(s):1627 - 1628
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    A numerical method for inverting Laplace transforms in several variables is presented. It is based on a previously published method for one variable. Examples are given. View full abstract»

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  • Computation of transform domain covariance matrices

    Publication Year: 1975, Page(s):1628 - 1629
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    It is often of interest in applications to compute the covariance matrix of a random process transformed by a fast unitary trasform. Here, the recursive definition of fast unitary transforms [1] is used to derive recursive relations for the covariance matrices of the transformed process. These relations lead to fast methods of computation of covariance matrices and to substantial reductions of the... View full abstract»

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  • Frequency domain criteria for absolute stability

    Publication Year: 1975, Page(s): 1630
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    Freely Available from IEEE
  • Introduction to the theory of space charge optics

    Publication Year: 1975, Page(s): 1630
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    Freely Available from IEEE

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H. Joel Trussell
North Carolina State University