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Proceedings of the IEEE

Issue 8 • Aug. 1979

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

    Publication Year: 1979, Page(s): c1
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  • Scanning the issue

    Publication Year: 1979, Page(s): 1091
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  • Acoustic microscopy with mechanical scanning—A review

    Publication Year: 1979, Page(s):1092 - 1114
    Cited by:  Papers (146)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2998 KB)

    Acoustic waves in liquids are known to have wavelengths comparable to that of visible light if the frequency is in the gigahertz range. The phenomena of Brillouin scattering in liquids is based on such waves. In helium near 2 K acoustic waves with a wavelength of 2000 Å were studied some ten years ago at UCLA. It follows from these observations that an imaging system based on acoustic radiati... View full abstract»

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  • Toward the realization of intelligent controls

    Publication Year: 1979, Page(s):1115 - 1133
    Cited by:  Papers (59)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2138 KB)

    This is a paper of expository nature reflecting the author's past experiences, his current research efforts, and his aspirations about the future of automatic-control systems. It is not intended to give a quantitative analysis of modern control methodologies, which may be found in the bibliography at the end of the text, but rather emphasize the importance of a growing area in control engineering.... View full abstract»

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  • Electromagnetic interference to television reception caused by horizontal axis windmills

    Publication Year: 1979, Page(s):1133 - 1142
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1335 KB)

    Electromagnetic interference to television (TV) reception produced by horizontal axis wind turbine generators or windmills has been identified and quantified by comprehensive theoretical and experimental studies. It is found that the rotating blades of a windmill can produce pulse amplitude modulation (PAM) of the total signal received, and that for an antenna so located as to pick up the specular... View full abstract»

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  • Decision feedback equalization

    Publication Year: 1979, Page(s):1143 - 1156
    Cited by:  Papers (279)  |  Patents (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1301 KB)

    As real world communication channels are stressed with higher data rates, intersymbol interference (ISI) becomes a dominant limiting factor. One way to combat this effect that has recently received considerable attention is the use of a decision feedback equalizer (DFE) in the receiver. The action of the DFE is to feed back a weighted sum of past decision to cancel the ISI they cause in the presen... View full abstract»

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  • Double-slot fin-line structure for millimeter wave applications

    Publication Year: 1979, Page(s):1159 - 1160
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (187 KB)

    This paper presents a rigorous analysis of a new fin-line structure which has two slots in the metal coating of the substrate. The dispersion and characteristics impedance are computed for the two independent normal modes of excitation. This structure should find extensive applications in the construction of fin-line components such as directional couplers and filters at millimeter wave frequencie... View full abstract»

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  • Low-pass and notch filters using the operational amplifier pole

    Publication Year: 1979, Page(s):1160 - 1162
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (255 KB)

    Low-pass and notch filters using the pole of the operational amplifier and a single external capacitor have been described. The limitations of these at low pole frequencies are also discussed. View full abstract»

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  • Low-frequency wide-band impedance matching by exponential transmission lines

    Publication Year: 1979, Page(s):1162 - 1163
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    It is shown that by using an exponentially tapered transmission line in Ruthroff's connection it is possible to achieve impedance matching at low frequencies over a much wider band than is possible by using a uniform line. For a given ratio of load to source resistances, there is shown to exist an optimum set of line parameters for which the bandwidth obtained is a maximum. View full abstract»

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  • Piecewise linear CAD model for avalanche photodetectors

    Publication Year: 1979, Page(s):1163 - 1165
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    A simple CAD model for avalanche photodetectors (APD) is developed. The model is based on a piecewise linear (PWL) approximation of the responsivity curve of the APD which may be obtained either from theoretical considerations or from terminal measurements. The model takes into account nonlinear effects in the design of APD optical receivers. View full abstract»

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  • Ternary-to-analog converters using resistor ladders

    Publication Year: 1979, Page(s):1165 - 1166
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    A description of ternary-to-analog (T/A) converters with high accuracy is given. These converters consist of the modified resistor ladder and some other circuit elements. The 5-trit T/A converter is constructed, and the results show that the maximum differential linearity error is 0.1 least significant trit (LST). View full abstract»

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  • Elimination of redundancy

    Publication Year: 1979, Page(s):1166 - 1168
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (326 KB)

    Redundant bits always occur in handwritten character and make the classification [1] of recognition systems confusing. To eliminate these redundancies, connected numbers [2] will be employed in algorithm. View full abstract»

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  • Comments on "Fuzzy sets, fuzzy algebra, and fuzzy statistics"

    Publication Year: 1979, Page(s):1168 - 1169
    Cited by:  Papers (3)
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  • Walsh-function representation of shift registers with stochastic inputs

    Publication Year: 1979, Page(s):1169 - 1170
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (235 KB)

    A Walsh-Hadamard description for the operation of linear-feedback shift registers is presented. It is used to study the tranisent and steady-state behavior of shift registers with respect to a stochastic input and an initial register state. View full abstract»

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  • Mapping of microwave power transmitted through the human thorax

    Publication Year: 1979, Page(s):1170 - 1171
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (315 KB)

    A point-by-point mapping of 2-GHz microwave power transmitted through the human thorax is attempted using a small aperture antenna which consists of a flanged, dielectric-loaded X band waveguide. The microwave projection image of the human thorax with the resolution of 2 can suggests the position of the heart. View full abstract»

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  • Vibrational fan using the piezoelectric polymer PVF2

    Publication Year: 1979, Page(s):1171 - 1173
    Cited by:  Papers (5)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    Cantilever multimorph structures using the piezoelectric polymer PVF2exhibit large amplitude vibrational motion when driven with an ac voltage. The possibility seems attractive of using such simple solid-state structures for low-power, compact, and maintenance-less fans for ventilation or cooling applications, for example, in electronic equipment. View full abstract»

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  • An acoustic focusing device with an interdigital transducer on a thin piezoelectric plate

    Publication Year: 1979, Page(s):1173 - 1174
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (124 KB)

    A new type of Lamb wave device for acoustic focusing is presented. The device has an interdigital transducer deposited on a thin piezoelectric ceramic plate. In the device, Lamb wave is radiated from the surface without the interdigital electrodes into water and interferes constructively at a focal point in water. View full abstract»

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  • Introduction to circuit synthesis and design

    Publication Year: 1979, Page(s):1175 - 1176
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  • Management of engineering projects

    Publication Year: 1979, Page(s): 1175
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  • Products liability and the reasonably safe product

    Publication Year: 1979, Page(s): 1176
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  • Sequency theory: Foundation and applications

    Publication Year: 1979, Page(s): 1176
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  • Power system control and stability

    Publication Year: 1979, Page(s):1177 - 1178
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  • Optimum systems control

    Publication Year: 1979, Page(s): 1177
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  • Linear systems, Fourier transforms and optics

    Publication Year: 1979, Page(s): 1178
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  • Quantum electrodynamics

    Publication Year: 1979, Page(s): 1178
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Editor-in-Chief
H. Joel Trussell
North Carolina State University