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Proceedings of the IEEE

Issue 12 • Dec. 1969

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Displaying Results 1 - 25 of 39
  • [Front cover and table of contents]

    Publication Year: 1969, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1969, Page(s): 2095
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    Freely Available from IEEE
  • Tunable optical parametric oscillators

    Publication Year: 1969, Page(s):2096 - 2113
    Cited by:  Papers (205)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1740 KB)

    This paper reviews progress on tunable optical parametric oscillators. Topics considered include: parametric amplification of Gaussian beams: threshold; tuning techniques, spectral output, and stability; saturation and power output; spontaneous parametric emission; nonlinear materials; and far infrared generation. View full abstract»

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  • Transversal filters with continuously tapped delay lines (CTT filters)

    Publication Year: 1969, Page(s):2114 - 2122
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (946 KB)

    The properties of common transversal filters are well known. Transversal filters with continuously tapped delay lines have the advantage that they do not show a periodic continuation of the frequency characteristic. Therefore it is not necessary to use an additional filter for suppressing higher frequency components. After an introduction to CTT filter theory the realization of transversal filters... View full abstract»

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  • Matrix methods for the study of a regulated synchronous machine

    Publication Year: 1969, Page(s):2122 - 2136
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1149 KB)

    A powerful but simple matrix method for the digital computer manipulation of large sets of differential and algebraic equations is introduced to the field of power systems. The method is first illustrated with reference to the linearized equations representing a general-purpose turboalternator model. Subsequently, the form of the system equations obtained as a result of the matrix method is seen t... View full abstract»

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  • Analog computer simulation of a three-phase full-wave controlled rectifier bridge

    Publication Year: 1969, Page(s):2137 - 2146
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1000 KB)

    This paper establishes analog computer simulations of the widely used three-phase full-wave controlled rectifier bridge. It is shown that when the individual currents in the legs of the rectifier bridge are not developed directly in the simulation, it is possible to avoid the instability and drift problems which have plagued previous investigators. Furthermore, by proper attention to the periodic ... View full abstract»

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  • Transverse doppler effect with laser light in a reflection system

    Publication Year: 1969, Page(s):2148 - 2149
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    The theory of special relativity predicts a transverse Doppler effect of a laser beam retro-reflected from an artificial satellite. In such a two-way system the transverse Doppler effect is found to be four times as large as the same effect in a one-way system. View full abstract»

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  • An electronic-optical processor for correlation arrays

    Publication Year: 1969, Page(s):2149 - 2150
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (221 KB)

    A hybrid electronic-optical signal-processing system which can be applied to the recording and the reconstruction of one-and two-dimensional images of a radio-brightness distribution is described. View full abstract»

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  • An infrared sensitive Ge-Te heterojunction

    Publication Year: 1969, Page(s):2150 - 2151
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (218 KB)

    A new Ge-Te heterojunction device is described. Its small-signal-level resistance under IR excitation can be smaller than its dark resistance by a factor of at least 1000 at 77 K. View full abstract»

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  • The observation of coupling between low- and high-frequency resonances in a bounded plasma

    Publication Year: 1969, Page(s):2151 - 2152
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (245 KB)

    The coupling between low- and high-frequency resonances of a plasma capacitor is discussed. A low-frequency ion oscillation is found to cause the zero-order density profile to vary at ωi. This variation of the density profile causes the third-harmonic output of the capacitor to be frequency modulated. View full abstract»

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  • Time delay in multistage image tubes

    Publication Year: 1969, Page(s):2152 - 2153
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (354 KB)

    The temporal response of a single-stage image intensifier is characterized by the phosphor persistence, while that of a multistage unit is the convolution of the responses of the individual stages. This results in a greatly increased effective persistence, and a propagation delay of up to several milliseconds in commonly used three-stage image intensifiers. View full abstract»

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  • Measurement of the duration of the sampling function in the dynamic crossed-field photomultiplier

    Publication Year: 1969, Page(s):2153 - 2154
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (250 KB)

    Experimental measurements of the duration of the sampling function in the dynamic crossed-field photomultiplier are described. The results presented show that this device can operate with sampling in intervals ranging from 70 percent to less than 10 percent of the period of the RF field driving the device. View full abstract»

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  • A method of power measurement

    Publication Year: 1969, Page(s): 2155
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (107 KB)

    A method of measuring the power injected into a network is described. Either input current or voltage which are both complex waveforms, must be electrically integrable and phase-locked to the other. The method is particularly applicable to cases where one of the variables is sinusoidal. View full abstract»

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  • A simple method for producing floating inductors

    Publication Year: 1969, Page(s):2155 - 2156
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (207 KB)

    A simple method for producing ungrounded inductors using a gyrator is described. Floating inductors may be obtained from either grounded or ungrounded capacitors. The technique has an advantage in the low number of amplifiers required. View full abstract»

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  • On the reflection pattern made by a laser beam on the etched surface of germanium

    Publication Year: 1969, Page(s):2156 - 2158
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1493 KB)

    A laser beam is shot on the surface of single-crystal germanium, after etching. From the reflection pattern, the characteristics of etched pits and hillocks are examined and it is found that etched pits not only are simple holes but also are convex. In addition, a new reflection pattern in the orientation of [110] is reported. These new data will be applied to decide the orientation of single-crys... View full abstract»

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  • A proposed method of improving the rate of acoustooptical scanning of a laser beam

    Publication Year: 1969, Page(s):2158 - 2159
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (233 KB)

    An aperture dissection scheme is proposed here to shorten the transit time of Bragg angle acoustooptical scanning systems. This scheme can, in principle, reduce the transit time by a desirable factor without degrading the resolution. View full abstract»

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  • On the definition of the cutoff frequency fT

    Publication Year: 1969, Page(s): 2159
    Cited by:  Papers (69)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (131 KB)

    The commonly used definition of cutoff frequency fTof bipola transistors is predicated on the existence of a frequency domain in which the magnitude of the current gain β varies inversely with frequency. In the absence of such a domain, the definition is vague. The definition 1/fT= d/df[lm (1/β)] for f →0 is proposed. View full abstract»

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  • Transformation on a scalar-valued matrix product

    Publication Year: 1969, Page(s):2160 - 2161
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (215 KB)

    Some useful structures are derived for the scalar-valued matrix product x'Qy when substitutions x=Az and y=Bw are made. The value of such transformations is exemplified with a formulation for probabilistic parameter inaccuracy effects. View full abstract»

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  • Diffusion flow matrix method

    Publication Year: 1969, Page(s):2161 - 2162
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (239 KB)

    The diffusion flow matrix and the impedance of the diffusion flow are introduced to solve for the diffusion flow of particles. This matrix method is similar to that used in transmission line analysis, and the results may be obtained easily with a well-known calculation. View full abstract»

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  • A laser doppler velocimeter employing a scanning interferometer

    Publication Year: 1969, Page(s): 2161
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (146 KB)

    All previously reported laser Doppler velocity measuring devices employ either the local oscillator-heterodyne type of coherent detection or a two-beam differential Doppler technique. A third method employing a passive interferometer is proposed and shown to have significant advantages. View full abstract»

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  • Microwave holography

    Publication Year: 1969, Page(s):2162 - 2164
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (710 KB)

    Using Gabor's two-step imaging process, a hologram has been constructed with microwave radiation at 16 GHz, and image reconstruction has been accomplished at optical wavelengths using a 6328 Å laser source. For this hologram a phased receiving array sampled the scattered field in the vertical direction, while the object rotation resulted in the generation of a synthetic array in the horizonta... View full abstract»

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  • CW operation of GaAs planar Gunn diodes with evaporated contacts

    Publication Year: 1969, Page(s):2164 - 2165
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (702 KB)

    The modification of an evaporated contact GaAs Gunn diode is reported in which geometry control is used to achieve improved terminal characteristics. The devices operate in a CW mode at a reduced terminal voltage and have excellent trigger response. View full abstract»

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  • An inequality for power

    Publication Year: 1969, Page(s):2165 - 2166
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (205 KB)

    Denote the current vector, the voltage vector, and the power dissipated in a resistive reciprocal passive lumped, or distributed, n-port by {i, e, P}, respectively. Consider the two actual, and one hypothetical, regimes {i1, e1, P1}, {i2, e2, P2}, and {i1, e2, P}. It is shown that P ≤ √P1... View full abstract»

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  • Modification of topological formulas for active two-port networks

    Publication Year: 1969, Page(s):2166 - 2167
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    It is shown that the topological formulas for active two-port networks can be modified to appear in a form similar to those for passive two-port networks without mutual inductances. View full abstract»

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  • Internal current gain in microwave-biased gallium-doped silicon 8-14 µm IR detectors

    Publication Year: 1969, Page(s):2167 - 2168
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (175 KB)

    It has been shown that internal current gain may be obtained by the application of microwave bias to intrinsic photoconductors. This letter presents experimental evidence of the same effect in an extrinsic photoconductor, gallium-doped silicon. View full abstract»

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H. Joel Trussell
North Carolina State University