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Popular Articles (July 2015)

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  • 1. Very-Wide-Band Impedance-Matching Network

    Publication Year: 1962 , Page(s): 38 - 44
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (936 KB)  

    A method is described for combining two transformers and supplementary network elements in a class of wideband impedance-matching networks whose over-all bandwidth in octaves is essentially the sum of those of the two component transformers. One transformer transmits the high-frequency portion of the required operating range and is relieved of the low-frequency requirements, while the other transf... View full abstract»

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  • 2. Realization of a Filter with Helical Components

    Publication Year: 1961 , Page(s): 99 - 110
    Cited by:  Papers (6)  |  Patents (5)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1728 KB)  

    In the VHF range, high-quality narrow-band filters with reasonable physical dimensions are extremely difficult to realize. Excessive pass-band insertion loss accompanies filters employing lumped constant elements, and unreasonable size is a natural consequence of coaxial-resonator filters. Harmonic crystal filters are inadequate because of the unpredictable amount of spurious modes above the harmo... View full abstract»

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  • 3. Piezoelectric Materials, A Review of Progress

    Publication Year: 1962 , Page(s): 193 - 211
    Cited by:  Papers (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (3072 KB)  

    This paper is a review of the properties of the more important piezoelectric materials. Section I discusses the basic principles of the phenomena of piezoelectricity and elasticity from the standpoint of crystal physics. Section II is a brief account of the electrical measurements of piezoelectric vibrators which are required to determine the basic parameters defining the piezoelectric, elastic an... View full abstract»

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  • 4. Resolver Function Error Versus RC Loading

    Publication Year: 1955 , Page(s): 44 - 60
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (872 KB)  

    A system consisting of an input driving amplifier and resolver with shielded output cables used for transmitting the rotor voltages an appreciable distance to a resistive load is considered. This "R-C" loading is shown to affect the resolver function error and to change the time phase shift of output voltage. View full abstract»

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  • 5. A Figure of Merit for the Design of Inductance Coils Having Low Distributed Capacitance

    Publication Year: 1962 , Page(s): 102 - 105
    Request Permissions | Click to expandAbstract | PDF file iconPDF (664 KB)  

    The performance of an inductor is often significantly compromised by the combined effects of series resistance and distributed capacitance. For a given inductance value and coil configuration, it is always possible to vary the absolute size and/or turns count so as to reduce one residual parameter at the expense of an increase in the other. The ratio M = L/RC2is unaffected by these tran... View full abstract»

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  • 6. A Simple, Exact Equivalent Circuit for the Three-Winding Transformer

    Publication Year: 1962 , Page(s): 212 - 213
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (264 KB)  

    An equivalent circuit is described for the three-winding transformer which is similar in form to the classical equivalent T of the two-winding transformer. As in the equivalent T, the performance of the circuit shown can be visualized and the elements of the circuit can usually be related to specific transformer constants. It is shown that the circuit is also exact. View full abstract»

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  • 7. Synchro and Resolver Performance Definitions

    Publication Year: 1956 , Page(s): 88 - 98
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1320 KB)  

    A consistent set of fundamental synchro and resolver definitions is presented with some application notes. The realizable performance of these units in a system is indicated. These definitions or Proposed Standards have been subdivided into three parts, as follows: I. Precision resolver definitions, II. Synchro control transmitter definitions, III. Synchro performance definitions. Each subject wil... View full abstract»

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  • 8. Recent Advances in Luminescence (Cathodoluminescence and Electroluminescence)

    Publication Year: 1957 , Page(s): 114 - 129
    Request Permissions | Click to expandAbstract | PDF file iconPDF (3000 KB)  

    Recent developments are reviewed in the field of cathodoluminescence and electroluminescence. Emphasis is placed on the applications of luminescence to electronics, although some attention also is given to simplified explanations of the phenomena involved. Included are discussions of transparent phosphor films for "fiat" cathode-ray tubes and other purposes, solid-state image display devices, and ... View full abstract»

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  • 9. Realization of a Filter with Helical Components

    Publication Year: 1962 , Page(s): 213 - 214
    Request Permissions | Click to expandAbstract | PDF file iconPDF (264 KB)  

    First Page of the Article
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  • 10. Electrical Properties of Epoxy Resins

    Publication Year: 1957 , Page(s): 110 - 113
    Cited by:  Papers (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (600 KB)  

    Power factor, loss factor, dielectric constant, volume resistivity, surface resistance, and dielectric strength of epoxies, varying in viscosity and reactivity and cured with several types of hardeners, have been determined and form the basis for this report. The effect of cure, temperature, and frequency on electrical properties also is presented. The importance of proper selection of resin, hard... View full abstract»

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  • 11. Noise Measurements of Composition Resistors; Part I. The Method and Equipment

    Publication Year: 1955 , Page(s): 61 - 78
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1288 KB)  

    Voltage fluctuations due to direct current flowing in composition resistors have been measured with a National Bureau of Standards experimental test set. A second group of measurements were made as prescribed in the JAN-R-11 Specification. The two measuring systems are described and test results compared. Several groups of commercial resistors of different manufacture have been measured and the re... View full abstract»

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  • 12. Noise Measurements of Composition Resistors; Part II. Characteristics and Comparison of Resistors

    Publication Year: 1955 , Page(s): 79 - 92
    Cited by:  Papers (5)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1304 KB)  

    A description of the noise generated in composition resistors due to direct-current flow is given, based on measurements of mean-square values of voltage fluctuations. Various commercial resistors including some film types have been measured in a study of the relationships between "current-noise" and several parameters such as dc current and voltage, dc power, resistance, duration of current flow,... View full abstract»

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  • 13. A Distributed-Parameter Approach to the High-Frequency Network Representation of Wide-Band Transformers.

    Publication Year: 1961 , Page(s): 23 - 30
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1016 KB)  

    An approach to the high-frequency representation is developed from the point of view of distributed-parameter networks. This viewpoint may be directly employed to compute insertion or transmission functions. Alternatively, it provides a method for determining the element values for lumped-parameter equivalent circuits. This method is most easily applied to transformers having two winding layers wi... View full abstract»

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  • 14. Magnetism and the Rare-Earth Metals

    Publication Year: 1959 , Page(s): 93 - 105
    Request Permissions | Click to expandAbstract | PDF file iconPDF (2128 KB)  

    After a brief outline of the history of the discovery and separation of the rare-earth elements, the modern theory of paramagnetism is summarized, and its application to these metals is discussed, with particular attention paid to the way in which deviations from the simple laws of paramagnetism at low temperatures can yield information on the types of magnetic interaction which exist in them. The... View full abstract»

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  • 15. Current Noise and Nonlinearity in Carbon Resistors

    Publication Year: 1958 , Page(s): 151 - 153
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (424 KB)  

    The relationship between nonlinearity and current noise in carbon resistors is investigated. Results are given for seven different groups of resistors, and they show that there is a correlation between the nonlinearity of a resistor and its current noise: in general, noisy resistors are more nonlinear than quiet ones. The character of the relationship varies considerably among the types tested, an... View full abstract»

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  • 16. Some Basic Physical Properties of Silicon and How They Relate to Rectifier Design and Application

    Publication Year: 1956 , Page(s): 110 - 113
    Request Permissions | Click to expandAbstract | PDF file iconPDF (728 KB)  

    The saturation range and the avalanche range of the reverse characteristic of a silicon rectifier and how these regions vary qualitatively with temperature and bulk characteristics of the silicon used are discussed. Also some reasons why these characteristics may vary from theoretical values are given. The forward current is discussed from the standpoint of the resistive component and conductivity... View full abstract»

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  • 17. A Proposed Current-Noise Index for Composition Resistors

    Publication Year: 1956 , Page(s): 14 - 20
    Cited by:  Papers (4)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (904 KB)  

    A study of fluctuation voltage generated by dc current flowing in composition resistors has led to a convenient factor for expressing the noisiness of a resistor. This factor, or index, is named "conversion gain" and indicates the efficiency with which a resistor converts applied dc power to noise power, expressed in decibel units. The method of measurement is described, and results are given for ... View full abstract»

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  • 18. A Recommended Standard Resistor-Noise Test System

    Publication Year: 1960 , Page(s): 71 - 88
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (2920 KB)  

    Summary--This paper describes a recommended standard resistor-noise test system, with the theory of operation given in considerable detail. The system provides for the measurement of a definitive resistor-noise quality Index. This Index, the "microvolts-per-volt" Index, is a modified form of the "conversion gain" index formerly used at NBS. The Index is a decibel expression for the number of micro... View full abstract»

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  • 19. A Comparison of Thin Tape and Wire Windings for Lumped-Parameter, Wide-Band, High-Frequency Transformers

    Publication Year: 1959 , Page(s): 49 - 57
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1352 KB)  

    This paper considers the problem of optimum design of the impedance matching, lumped-parameter, wide-band transformer model with all transmission zeros at infinity. The spiral-tape-winding transformer is compared with the wire-winding transformer with an electrostatic screen, and it is shown that the former has no advantage over the latter except (perhaps) at quite low impedance levels. The low-pa... View full abstract»

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  • 20. Reliable Precision Wirewound Resistor Design

    Publication Year: 1956 , Page(s): 116 - 119
    Request Permissions | Click to expandAbstract | PDF file iconPDF (720 KB)  

    The precision wirebound resistor has undergone fairly extensive design changes within the last four or five years. The old "open bobbin" style resistor has been completely replaced by the molded thermosetting plastic enclosed resistor. The new design is capable of performing at extremely low and high temperatures, and will withstand rugged environmental testing, such as salt water immersion, humid... View full abstract»

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  • 21. Progress in Cadmium Sulfide

    Publication Year: 1957 , Page(s): 129 - 132
    Request Permissions | Click to expandAbstract | PDF file iconPDF (648 KB)  

    Considerable progress has been made during the last two years in both the understanding and application of cadmium sulfide, which is an outstanding photoconductor material. Improved crystal growing techniques have resulted in large single crystals with more perfect crystal structure and higher purity. Further improvements in purity are sought by zone refining of cadmium and sulfur. Ultrasonic cutt... View full abstract»

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  • 22. Evaluating the Thermal Stability and Radiation Resistance of Silicone Dielectrics

    Publication Year: 1958 , Page(s): 108 - 115
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1016 KB)  

    This paper, directed toward the designers of electronic equipment, deals with the aspects of thermal stability and radiation resistance of silicone dielectrics. Information is included which indicates how designers can utilize the maximum thermal stability and radiation resistance inherent in the silicone molecule. It points out that the useful life of silicone electrical insulation subjected to t... View full abstract»

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  • 23. Transformer Design for Zero Phase Shift

    Publication Year: 1957 , Page(s): 82 - 85
    Request Permissions | Click to expandAbstract | PDF file iconPDF (552 KB)  

    A design method for obtaining minimum phase shift between output and input of a transformer is described. The method is applicable to precision reference transformers employed in analog computers and servo loops where minimum quadrature voltages are mandatory. A rigorous analysis of the equivalent circuit of the transformer demonstrates that the transformer can be treated as a combination lead and... View full abstract»

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  • 24. Electrohydrodynamic Components

    Publication Year: 1961 , Page(s): 57 - 64
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1360 KB)  

    Motion of unipolar ions in insulating liquids creates strong coupling between electrical and hydrodynamic systems energy. This permits us to pump liquids directly with electrical power or to build up electrical energy from liquid motion. The phenomenon has been used to build high-impedance electrohydrodynamic components such as switches, relays, voltage regulators, voltage generators and dc transf... View full abstract»

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  • 25. Effect of Change of Shape on Resistance of Wire and Ribbon

    Publication Year: 1961 , Page(s): 157 - 159
    Request Permissions | Click to expandAbstract | PDF file iconPDF (344 KB)  

    The change in resistance of wire and ribbon when wound respectively in a toroid or cylindrical shell has been calculated. Experimental data for wires confirming the theoretical calculations are presented. View full abstract»

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  • 26. A Review of the Influence of Recent Material and Technique Development on Transformer Design

    Publication Year: 1959 , Page(s): 201 - 209
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1104 KB)  

    The requirements for greater miniaturization, higher operating temperature capability, and better moisture protection have resulted in the development of new constructional techniques for electronic transformers. The developments in application of new materials and techniques are detailed. Among the new developments discussed are the application of fluorochemicals to transformers designed for maxi... View full abstract»

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  • 27. Cable Reliability in Ground Guided Missle Systems

    Publication Year: 1960 , Page(s): 54 - 60
    Cited by:  Patents (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1088 KB)  

    The increasing demand by equipment and system design engineers for greater operational and functional reliability of components has dictated the need for greater understanding and improvement of individual supporting parts. The present trend, in order to obtain reliable systems, is to devote maximum effort to perfecting or developing highly reliable equipments without commensurate effort to the ne... View full abstract»

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  • 28. Peaking Transformer on a New Principle

    Publication Year: 1956 , Page(s): 66 - 68
    Request Permissions | Click to expandAbstract | PDF file iconPDF (416 KB)  

    Highly peaked voltages are obtained by connecting a linear reactor in series with a steeply saturating reactor free from magnetic joints, if the combination is excited with a sinusoidal voltage, and the saturable reactor is tapped for the peaked voltage. Similar results may also be obtained from a composite design with plenty of magnetic joints if the return magnetic circuit is arranged in two par... View full abstract»

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  • 29. The Optimum Design of the Toroidal Resonator

    Publication Year: 1962 , Page(s): 115 - 119
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (672 KB)  

    The optimum design of a class of toroidal resonators which are capacitively loaded and therefore short in wavelengths is considered. The possibility of including magnetic cores with various types of air gaps is included and it is shown that below a certain critical size, which is a function of the magnetic merit factor, the net Q may be improved with the optimum material and the optimum air gap. E... View full abstract»

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  • 30. Measurement of Parameters Controlling Pulse Front Response of Transformers

    Publication Year: 1956 , Page(s): 20 - 25
    Cited by:  Papers (5)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (880 KB)  

    The two-element equivalent circuit commonly used in predicting the high-frequency or pulse-front response of a stepdown or step-up transformer is not applicable to transformers with turns ratios near unity. Furthermore, the transformer leakage inductance (the series element in the circuit) may vary with frequency or time because of skin effects in the windings, and the distributed capacitance (the... View full abstract»

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  • 31. Aircraft Motor Generator with Secondary Standard Frequency Output

    Publication Year: 1958 , Page(s): 28 - 31
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (552 KB)  

    The paper describes an experimental ac motor alternator assembly which produces an output frequency exactly equal to a low-power secondary standard frequency signal source, such as a tuning fork or crystal oscillator. The frequency-controlled system employs a synchronizing type of control in contrast to the more generally employed error-detecting systems. As a result, no error exists between the o... View full abstract»

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  • 32. Capacitor Calibration by Step-Up Methods

    Publication Year: 1960 , Page(s): 124 - 129
    Request Permissions | Click to expandAbstract | PDF file iconPDF (856 KB)  

    Summary--Step-calibration methods are used in many physical laboratories for the extension of measurements to quantities far removed from the magnitude of greatest accuracy at which absolute determinations are made. The excellent precision of repetitive substitution procedures is exploited by step-up or step-down methods to extend measurements to higher or lower magnitudes without serious degradat... View full abstract»

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  • 33. The Analysis and Design of Constant Voltage Regulators

    Publication Year: 1956 , Page(s): 11 - 14
    Cited by:  Papers (5)  |  Patents (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (648 KB)  

    This paper is concerned with analysis and with the development of method for designing constant voltage regulators. A constant voltage regulator will give a more nearly constant output voltage regardless of a limited input variation. This type of regulator consists of an input inductor, a transformer, and condenser connected as shown in Fig. 1. The series inductor resonates with the capacitance an... View full abstract»

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  • 34. High Dielectric Constant Ceramics

    Publication Year: 1959 , Page(s): 238 - 251
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (2312 KB)  

    Currently available high dielectric constant ceramics enjoy certain special advantages for use in capacitor design. However, there are also severe limitations which must be well understood by engineers attempting their application. This paper summarizes the principal electrical characteristics, favorable or otherwise, of these materials and attempts to relate them to well-known basic dielectric pr... View full abstract»

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  • 35. Transformer Design Chart

    Publication Year: 1955 , Page(s): 10 - 14
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (480 KB)  

    This paper describes a transformer design chart by which the design of two winding, sixty cycle, low voltage transformers can be made without most of the time-consuming design procedures. Its use is intended for transformer design engineers; therefore, it provides only the winding information that varies for each design. A specific series of cores and operating conditions are assumed. The turns, w... View full abstract»

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  • 36. Lightweight Ceramic Materials as High-Frequency Dielectrics

    Publication Year: 1957 , Page(s): 133 - 135
    Request Permissions | Click to expandAbstract | PDF file iconPDF (344 KB)  

    To eliminate some of the weight problems usually associated with ceramic dielectrics, lightweight (porous) ceramic materials have been developed which show excellent electrical properties at temperatures up to 800°C and a high strength-to-weight ratio. These materials generally are characterized by low-dielectric constant values, low loss, and a fiat temperature vs dielectric constant relatio... View full abstract»

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  • 37. Nonreciprocal Behavior in Passive Systems

    Publication Year: 1962 , Page(s): 77 - 81
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (616 KB)  

    The nonreciprocal behavior of certain types of linear passive systems is explained by employing the ideal gyrator as a network element. The pertinent network properties of passive nonreciprocal systems are developed, with particular attention being paid to the passive isolator. Actual examples of passive low-frequency gyrators and isolators are shown in the form of Hall effect devices and magneto-... View full abstract»

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  • 38. Metal and Oxide Film Potentiometers

    Publication Year: 1959 , Page(s): 105 - 108
    Request Permissions | Click to expandAbstract | PDF file iconPDF (656 KB)  

    Recent developments in resistors and potentiometers of the noble metal and metal oxide film types are described. Photographic methods of producing "meandered" resistance paths in the two types have been developed, as well as means of rhodium reinforcing the track portions to improve the wear characteristics, and in the case of oxide films, to reduce the contact resistance against the wiper. The re... View full abstract»

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  • 39. Radio-Frequency Autotransformers with Coaxial-Transmission-Line Windings

    Publication Year: 1961 , Page(s): 119 - 123
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (712 KB)  

    This paper describes a high-gain phase-sensitive magnetic amplifier which simultaneously possesses the high-gain property of the self-saturating (100 percent positive feedback) amplifiers and the limited circulating current property of the low-gain zero feedback amplifiers. These features are obtained by using feedback windings to obtain the self-saturating large-gain property. However, the feedba... View full abstract»

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  • 40. Design and Performance of Air-Cooled Chassis for Electronic Equipment

    Publication Year: 1956 , Page(s): 38 - 44
    Cited by:  Papers (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (928 KB)  

    A method of cooling certain types of electronic equipment incorporates in the chassis a simple plate-fin heat exchanger, sometimes called a cold plate or cooled chassis. To determine which internal configuration gives most efficient heat transfer, equations for cold plates are developed, and fin density, height, and thickness are varied. The effect on required power, coolant flow rate, and pressur... View full abstract»

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  • 41. Protection of Coaxial Cable Assemblies

    Publication Year: 1956 , Page(s): 73 - 74
    Request Permissions | Click to expandAbstract | PDF file iconPDF (328 KB)  

    First Page of the Article
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  • 42. Dielectric Films in Aluminum and Tantalum Electrolytic and Solid Tantalum Capacitors

    Publication Year: 1957 , Page(s): 73 - 82
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (2176 KB)  

    The characteristics of electrolytic capacitors are determined primarily by the nature of the dielectric oxide film. The nature of this film and the factors which influence its physical and chemical characteristics are discussed. Electron photomicrographs of the electrolytic oxide film on aluminum, as well as X-ray diffraction and direct electrical measurements of the dry oxide film, reveal that it... View full abstract»

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  • 43. Development of Plastic Dielectric Capacitors

    Publication Year: 1959 , Page(s): 114 - 118
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (672 KB)  

    The salient characteristics of capacitors having dielectrics of polystyrene, polythene, polytetrafiuorethylene, and polyethylene terephthalate are enumerated, and the current trends are indicated. Test results on experimental capacitors made with the new polycarbonate film are also quoted. View full abstract»

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  • 44. Thin Ferromagnetic Films

    Publication Year: 1960 , Page(s): 3 - 14
    Request Permissions | Click to expandAbstract | PDF file iconPDF (2120 KB)  

    This article gives an account of the work at the Royal Radar Establishment (RRE), Malvern, England, on the preparation and properties of thin ferromagnetic films. The work provides the prospect of a computer store in which a million bits would occupy less than an 18-inch cube, and which would possess a switching time faster than 20 mµsec. The store would be cheap and easily constructed. View full abstract»

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  • 45. Recent Advances in the Solid-State Electrolytic Capacitor

    Publication Year: 1958 , Page(s): 72 - 75
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (592 KB)  

    The tremendous interest in the solid-state capacitor is due to the cornbination of superior technical characteristics with very small size and large "bulk" capacity. Present literature shows 35 vdc and 85°C voltage and temperature limitations. Through the analysis of units made to operate at the extended limits of 100 vdc and 150&degC, a model has been proposed which serves to explain fou... View full abstract»

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  • 46. Transient Effects of Pulsed Nuclear Radiation on Electronic Parts and Materials

    Publication Year: 1961 , Page(s): 123 - 128
    Request Permissions | Click to expandAbstract | PDF file iconPDF (872 KB)  

    Nuclear radiation induced transient changes in the electrical characteristics of electronic parts and materials obtained in recent experiments at the GODIVA II pulse reactor are described and discussed. The electronic parts investigated and monitored during exposure include: coaxial cables; resistors of various types and manufacture, ranging in value from 100 ohm to 1 megohm; sensistors; capacitor... View full abstract»

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Aims & Scope

This Transaction ceased production in 1962. The current publication is titled IEEE Transactions on Components, Packaging, and Manufacturing Technology.

Full Aims & Scope