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Proceedings of the IEEE

Issue 9 • Sept. 1967

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Displaying Results 1 - 25 of 51
  • [Front cover and table of contents]

    Publication Year: 1967, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1967, Page(s): 1543
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    Freely Available from IEEE
  • An introduction to computer graphic terminals

    Publication Year: 1967, Page(s):1544 - 1552
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1030 KB)

    The purpose of this paper is to introduce the reader to some of the fundamental hardware and software aspects of typical CRT display consoles. Techniques for accomplishing display refresh are explained. The evolution of the CRT controller, from a device which simply includes a pair of digital-to-analog converters to a system which is a rather sophisticated, special-purpose hybrid processor (includ... View full abstract»

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  • Surge impedance

    Publication Year: 1967, Page(s):1553 - 1566
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1273 KB)

    In the conventional treatment of traveling waves on lossless lines, inductance and capacitance per unit length of line are used. Such treatment results in the usual concept of surge impedance and only certain aspects propagate with the velocity of light. The usual concepts of inductance and capacitance are defined in terms of their steady-state values. In the present paper, the treatment follows f... View full abstract»

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  • The rotator—A new network component

    Publication Year: 1967, Page(s):1566 - 1577
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1062 KB)

    This paper presents a new linear, reciprocal, active two-port network element called a rotator, of which there are three types: an R- rotator, an L-rotator, and a C-rotator. They have the unique property that whenever a nonlinear resistor, inductor, or capacitor is connected to one port of an R-, L-, or C-rotator, respectively, the resulting two-terminal network behaves as a new resistor, inductor... View full abstract»

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  • Digital measurement of narrowband noise power

    Publication Year: 1967, Page(s):1577 - 1582
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (538 KB)

    A digital measurement method for narrowband noise power is described and analyzed in the case of flat spectrum Gaussian noise. Noise power is measured by counting the number of times the noise voltage crosses upwards a fixed voltage level. The method should be useful in noise-figure measurements, and by applying it a digital radiometer can be constructed. This digital radiometer has the same theor... View full abstract»

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  • High-frequency backscatter from terrain with trees

    Publication Year: 1967, Page(s):1583 - 1590
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1446 KB)

    The standing-wave method was used to measure the radar cross section σ of a flat piece of ground on which stood a single tree. Measurements were made at 26 MHz at angles of elevation γ up to 22.5 degrees, by raising the transmitting antenna with a balloon and moving the receiving probe along the transmitter-target line by means of ropes. For horizontal polarization, σ was a smoothly... View full abstract»

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  • A self-scanned solid-state image sensor

    Publication Year: 1967, Page(s):1591 - 1602
    Cited by:  Papers (34)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2879 KB)

    An experimental television camera incorporating a completely integrated self-scanned solid-state image sensor has been built. The integrated sensor includes a photosensitive array having 32 400 picture elements, two 180-stage shift register scan generators and associated video coupling transistors. This large-scale integration of more than 100 000 components was carried out in the laboratory entir... View full abstract»

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  • Wideband pulse compression via Brillouin scattering in the Bragg limit

    Publication Year: 1967, Page(s):1602 - 1612
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1085 KB)

    The optical characteristics of a pulse compression system which makes use of Brillouin scattering in the Bragg limit have been studied. If one makes use of a diffraction-limited laser source of illumination, it is found that the correct system geometry results in a bandwidth which is as large as simple diffraction theory predicts. The study shows that the bandwidth of the system, for maximum signa... View full abstract»

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  • Transient behavior of high-field domains in bulk semiconductors

    Publication Year: 1967, Page(s):1615 - 1616
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (182 KB)

    A simple formula giving the growth rate of high-field domains in bulk semiconductors is derived. When the diffusion constant is small, it reduces to an extension of the equal-area law discussed by Butcher et al. View full abstract»

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  • On the thermodynamic paradox in ferrite-loaded waveguides

    Publication Year: 1967, Page(s):1616 - 1617
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (197 KB)

    The study of propagation in lossless waveguides containing lossless magnetized ferrite leads to a paradox: energy is not conserved. This letter shows that the lossless ferrite model used is not physically realizable, as it violates the principle of causality, and should not be used in general theoretical developments. View full abstract»

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  • Improved performance of silicon avalanche oscillators mounted on diamond heat sinks

    Publication Year: 1967, Page(s):1617 - 1618
    Cited by:  Papers (23)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    Silicon avalanche diodes have been mounted on diamond to achieve a continuous power density more than twice that achieved on copper. A pair of parallel connected wafers oa a single sample of diamond produced 4.7 watts of CW power at 13.3 GHz using a room temperature heat sink. View full abstract»

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  • A pulse regenerating circuit with two Esaki diodes

    Publication Year: 1967, Page(s):1618 - 1619
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (209 KB)

    A new pulse regenerating circuit is developed, which has no reflection and transmits pulses unidirectionally, when it is inserted in a transmission line. The circuit consists of a pair of Esaki diodes connected face to face and a transformer. View full abstract»

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  • Comment on "Variable frequency crystal oscillators"

    Publication Year: 1967, Page(s):1619 - 1620
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (167 KB)

    In a practical variable frequency crystal oscillator the difference between the operating and series resonant frequencies is always smaller than fp- fs. This limitation can be overcome by a negative capacitance realized using a NIC which does not seriously degrade overall stability. View full abstract»

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  • The first-order coupled differential equations for waves in inhomogeneous warm magnetoplasmas

    Publication Year: 1967, Page(s):1620 - 1621
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    The first-order coupled differential equation for waves in gyrotropic inhomogeneous warm magnetoplasmas are derived for the case where the plasma parameters N0(z), T0(z), v(z), and H0(z) vary in the z direction only. In this form they are well sited for solution on a digital computer by the Runge-Kutta method. View full abstract»

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  • YIG-tuned Gunn effect oscillator

    Publication Year: 1967, Page(s): 1621
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    A mechanical cavity of coaxial or waveguide type is generally used as a resonator of a Gunn oscillator. Reported here is the use of a resonator consisting of a ferrimagnetic sample instead of the mechanical cavity to obtain the electrically tunable Gun oscillator. The coupling between the Gunn diode and the the ferrimagnetic resonator was experimentally observed and oscillation frequency from 3.2 ... View full abstract»

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  • Sound wave hologram and optical reconstruction

    Publication Year: 1967, Page(s):1622 - 1623
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (562 KB)

    An acoustic hologram is constructed using a sound wave (20 kHz), scanning the acoustic fields by a microphone, and lighting a lamp by amplified electrical signals from the microphone. The original image is reconstructed to illuminate the sound wave hologram of reduced size by the laser light (6328 Å) and observed by a microscope. View full abstract»

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  • "Self-stabilized" cascaded negative-conductance amplifiers

    Publication Year: 1967, Page(s): 1622
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (141 KB)

    A simple circuit is proposed for amplifiers that consist of cascaded negative-conductance stages. A biasing scheme is proposed that utilizes the incremental resistance of the active devices to reduce series resistance in the bias circuit. An experimental two-stage tunnel-diode amplifier of this design provides voltage gain of 10 dB ± 1 dB over a frequency range extending from below 200 Hz to ... View full abstract»

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  • Further comment on the singularities of the tensor Green's function

    Publication Year: 1967, Page(s):1624 - 1626
    Cited by:  Papers (2)
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  • On the linear phase approximation

    Publication Year: 1967, Page(s):1627 - 1628
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (163 KB)

    A simple technique for linear phase approximation is illustrated. The approximation polynomial used is of the form Pn(s) = M(s) + kN(s), where M(s) and N(s) are even and odd polynomials with interlaced, and equally spaced, imaginary zeros. The influence of constant k is investigated, and it is shown that a proper selection of that constant leads to good approximation. View full abstract»

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  • Application of the nonparametric c1statistical test to radar cross section signature comparisons

    Publication Year: 1967, Page(s):1628 - 1629
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (203 KB)

    The nonparametric rank order c1test is proposed and evaluated as a method for obtaining a quantitative, numerical measure of the degree of similarity existing between two radar cross section signatures as a function of aspect angle. View full abstract»

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  • Optimum design of spherical and ellipsoidal pumping chambers for lasers

    Publication Year: 1967, Page(s):1630 - 1631
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (206 KB)

    A numerical calculation of the radiation transfer efficiency, performed on the basis of geometrical optics, is presented, wherein the reflectivity of chamber walls is considered. The high efficiency of the ellipsoidal pumping chamber is found experimentally and numerically to be achieved mostly by the use of filamentary light sources. View full abstract»

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  • On waves in an anisotropic plasma imbedded in a moving dielectric medium

    Publication Year: 1967, Page(s):1631 - 1632
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (193 KB)

    The governing equations for electromagnetic fields in an anisotropic plasma imbedded in a moving dielectric medium are obtained. Examination of the wave and dispersion equations yields information on the elliptically or linearly polarized waves which may exist when the external magnetic field is parallel or perpendicular to the direction of motion, respectively. View full abstract»

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  • Determining TV scan pattern distortions by means of line gratings

    Publication Year: 1967, Page(s):1632 - 1633
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (665 KB)

    A highly accurate method is presented for determining TV scan pattern linearity using a dot pattern transparency. This technique allows a standard scan pattern to be compared with both the camera scan pattern and display raster. It displays the difference as moiré interference patterns. View full abstract»

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  • Photovoltaic effect in a metal-semiconductor junction

    Publication Year: 1967, Page(s):1634 - 1635
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (194 KB)

    Photovoltage versus light intensity measurements, performed on high-resistivity CdS layers with Cu contacts, showed excellent agreement with a previously proposed model for the saturation of the photovoltage in the high-intensity region. This yields a new possibiliy of measuring the barrier voltage for CdS-metal contacts. View full abstract»

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North Carolina State University