Proceedings of the IEEE

Issue 10 • Oct. 1964

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Displaying Results 1 - 25 of 68
  • [Front cover and table of contents]

    Publication Year: 1964, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1964, Page(s): 1089
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    Freely Available from IEEE
  • Frontispiece

    Publication Year: 1964, Page(s): 1090
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    Freely Available from IEEE
  • Poles and zeros: Cryogenic electronics

    Publication Year: 1964, Page(s): 1091
    Cited by:  Papers (1)
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  • Semiconductors at cryogenic temperatures

    Publication Year: 1964, Page(s):1092 - 1104
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1314 KB)

    A review is made of those physical properties of semiconductors which are relevant to device operation at cryogenic temperatures. These include carrier density, mobility, hot carrier phenomena, recombination and trapping, and the performance of p-n junctions. A description is then given of the cryogenic operation of semiconductor devices together with an assessment of future possibilities. View full abstract»

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  • Plasma effects in solids

    Publication Year: 1964, Page(s):1105 - 1112
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (905 KB)

    There have been several interesting solid-state plasma effects reported in the literature; to date, emphasis has been placed on understanding the various phenomena rather than device construction. However, since there are microwave device potentials in the form of both passive elements such as isolators, circulators and switches, and active elements such as amplifiers, and generators, it is expect... View full abstract»

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  • Microwave acoustics

    Publication Year: 1964, Page(s):1113 - 1127
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2124 KB)

    During the last few years, generation and propagation of acoustic waves have been extended to frequencies high into the gigacycle region. This paper deals with microwave acoustics, with emphasis on effects and techniques utilized at cryogenic temperatures. The extremely short wavelengths require the use of single crystal propagation media, free from defect scattering, supercooled to reduce wave at... View full abstract»

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  • Correction to "Real-frequency stability criteria for linear time-varying systems"

    Publication Year: 1964, Page(s):1127 - 1128
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  • Geometric acoustic attenuation at gigacycle frequencies in single crystals of quartz

    Publication Year: 1964, Page(s):1129 - 1137
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1538 KB)

    Successive acoustic echo amplitudes have been calculated from a model for microwave frequency acoustic propagation based on ray optics that ignores any intrinsic attenuation. The computed echoes resemble experimental acoustic decay patterns generated by microwave pulses in single crystals of piezoelectric materials. The attenuation has been found to be due to off-axis propagation of the acoustic e... View full abstract»

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  • Microwave properties of superconductors

    Publication Year: 1964, Page(s):1138 - 1147
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (992 KB)

    The major features of the interaction of microwaves with superconductors are discussed and interpreted in terms of simple phenomenological models. Three limiting cases are treated: the "Pippard limit" which usually holds when the normal state mean free path is large; the "London limit" for small normal state mean free path; and thin films. A section is devoted to the nonlinear properties of superc... View full abstract»

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  • Analysis and performance of superconductive coaxial transmission lines

    Publication Year: 1964, Page(s):1147 - 1154
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1611 KB)

    This paper discusses the mechanisms affecting metallic conduction and dielectric properties in relation to a low temperature transmission line to provide a basis for analysis of the characteristic change, and the remaining losses at low temperature. Specific attention is given to lines employing Teflon or polyethylene as dielectrics, and operating up to 10 Gc. The construction and measured perform... View full abstract»

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  • Superconductive tunneling

    Publication Year: 1964, Page(s):1155 - 1163
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (739 KB)

    This paper reviews briefly the tunneling mechanisms through a thin insulating barrier between two metals and mentions some device applications based on these mechanisms. Three different cases are described: tunneling between metals both in the normal (nonsuperconductive) state, tunneling between them when one or both are superconductive, and Josephson tunneling through a very thin barrier between ... View full abstract»

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  • Cryoelectric memories

    Publication Year: 1964, Page(s):1164 - 1176
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2135 KB)

    The phenomenon of superconductivity is particularly attractive for computer memories because of the potential low cost per bit stored for memories larger than several million bits. Approximate expressions for the drive requirements of cryoelectric continuous film memories are developed based on Ginzburg-Landau theory. It is shown that crossed-film cryotrons can be matched to continuous film memori... View full abstract»

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  • Operation of the cryogenic continuous film memory cell

    Publication Year: 1964, Page(s):1177 - 1181
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (977 KB)

    Problems and requirements associated with using the cryogenic continuous film memory (CCFM) cell in a random access memory with coincident current cell selection are discussed. Pulse measurement techniques are described which provide informarion on the storage level within the cell and on the basis of several simple a sumptions, permit the operating range (drive current tolerance) of the cell in a... View full abstract»

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  • Structure of a cryogenic associative processor

    Publication Year: 1964, Page(s):1182 - 1190
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    A 5000 word, 72-bit per word cryogenic associative processor has been designed in considerable detail. In addition to the basic associative features, this processor features sorting, selective writing, marking, and next higher, next lower, and range retrieving. The physical and logical structures of the system are described, and the low temperature and room temperature requirements are outlined. T... View full abstract»

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  • An ultrasensitive linear cryotron amplifier

    Publication Year: 1964, Page(s):1191 - 1206
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1593 KB)

    This report shows that crossed film cryotrons can be cascaded to form high-gain, high-sensitivity amplifiers if negative feedback is applied to counteract a large low-frequency noise component. The design of cryotron feedback amplifiers is analyzed, and several practical amplifier circuits are described. One of these has an upper cutoff frequency of 1.7 Mc per stage, and another can detect 5×... View full abstract»

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  • Photomask–photoresist techniques for cryotron fabrication

    Publication Year: 1964, Page(s):1207 - 1215
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1913 KB)

    Thin film superconductors will find significant applications as computer components only if their potential for economical high density integration in a single unit of manufacture becomes a reality. This paper will describe a fabrication process based on the use of photomask-photoresist techniques to form multilayered devices which meet these requirements. This process is compared with that former... View full abstract»

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  • The ryotron—A new cryogenic device

    Publication Year: 1964, Page(s):1216 - 1223
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (775 KB)

    This paper describes a cryogenic electronic variable inductor called the ryotron. This device may be represented as a dc-isolated two-port network useful for both digital and analog circuits. Included are 1) general introduction, 2) the principle of operation, 3) experimental results, 4) device applications, and 5) discussion. View full abstract»

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  • The ryotron—A variable inductance cryogenic device

    Publication Year: 1964, Page(s):1223 - 1233
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2556 KB)

    Thin-film superconducting devices, called ryotrons, are capable of steering currents between paths by controlling the inductance in each branch. A number of different ryotron geometries are considered and analyzed. The ratio between the extreme inductance states of the ryotron is determined by the detailed configuration and by material properties. Inductance ratios as large as 146 have been observ... View full abstract»

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  • Critical temperature of niobium and tantalum films

    Publication Year: 1964, Page(s):1234 - 1238
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (477 KB)

    A method for depositing thin, superconductive films of Nb and Ta by electron beam evaporation is presented, and the critical temperature of these films is discussed as a function of deposition conditions. Gettering, increasing the ratio of impinging vapor atoms to residual gas atoms, and raising the substrate temperature during deposition gives films with a lower impurity content and higher critic... View full abstract»

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  • A superconducting Helmholtz pair

    Publication Year: 1964, Page(s):1238 - 1239
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    The design and construction of a superconducting Helmholtz pair capable of delivering magnetic fields of sufficient uniformity over a practical working volume to perform a nuclear magnetic resonance experiment is described in this paper. Provision for achieving ac field modulation with a superconducting coil is also made. View full abstract»

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  • A new method for calculating system performance measures

    Publication Year: 1964, Page(s): 1240
    Cited by:  Papers (6)
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    First Page of the Article
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  • The mechanism of resonance probe

    Publication Year: 1964, Page(s):1240 - 1241
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  • Computation of self– and mutual–inductance of axially symmetric coils using resistance network simulation

    Publication Year: 1964, Page(s):1241 - 1242
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  • Effect of modulation-correlation choices on Dicke radiometer performance

    Publication Year: 1964, Page(s): 1242
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    First Page of the Article
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North Carolina State University