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IBM Journal of Research and Development

Issue 1 • Date Jan. 1966

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Displaying Results 1 - 16 of 16
  • Solution of the Partial Differential Equations Describing Photodecomposition in a Light-absorbing Matrix having Light-absorbing Photoproducts

    Publication Year: 1966, Page(s):2 - 5
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (329 KB)

    A solution has been obtained for the system of partial differential equations describing the photolysis of an arbitrary number of light-sensitive materials contained in a semirigid, nonscattering, actinic light-absorbing matrix. Each photoreactant may produce stable, actinic light-absorbing products. The solutions reduce to known closed form expressions for the simplest cases. View full abstract»

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  • Calculations of Impurity Atom Diffusion Through a Narrow Diffusion Mask Opening

    Publication Year: 1966, Page(s):6 - 12
    Cited by:  Papers (4)  |  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (434 KB)

    Relaxation methods have been used to solve a mixed boundary value problem arising in the fabrication of junction transistors: impurity atom diffusion through a narrow diffusion mask opening. This particular problem is encountered in the fabrication of very narrow diffused p-n junctions. It is shown that the depth of a very narrow junction cannot always be determined from an elementary one-dimensio... View full abstract»

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  • Design Technique for High-Efficiency Frequency Doublers Based on the Manley and Rowe Energy Relations

    Publication Year: 1966, Page(s):13 - 25
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (651 KB)

    This paper describes a design technique for high-efficiency microwave frequency doublers using a varactor diode. In this technique design parameters that can be measured in microwave circuits are derived from the Manley and Rowe energy relations in nonlinear reactances. These design parameters are: the characteristic impedances of the transmission lines of the microwave structure, the input and ou... View full abstract»

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  • Computation of Ion Trajectories in the Monopole Mass Spectrometer by Numerical Integration of Mathieu's Equation

    Publication Year: 1966, Page(s):26 - 40
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (921 KB)

    A high speed digital computer used with an off-line curve plotter enabled ion trajectories to be readily obtained in terms of the initial conditions and the parameters appearing in the differential equation of motion (Mathieu's equation). A study of these trajectories has led to the conclusion that ions should not be injected parallel to the axis of the instrument, as is done at present, but throu... View full abstract»

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  • On the Design and Performance of a Small 60-nsec Destructive Readout Magnetic Film Memory

    Publication Year: 1966, Page(s):41 - 50
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (566 KB)

    The design of a small very-high-speed magnetic film memory using existing components is summarized. The memory has a capacity of 32 words and 36 bits per word, operates in a destructive-readout mode, and has a cycle time of 60 nsec and an access time of 32 nsec. The storage medium is a continuous sheet of NiFe film. The operational characteristics of the film and the properties of the strip line a... View full abstract»

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  • On Measures of Logic Performance: Logic Quantum, Factor, and Figure of Merit

    Publication Year: 1966, Page(s):51 - 64
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (847 KB)

    A basic logic operation is considered of transferring a logic decision from one point to another point. A certain energy level, WL, corresponding to decision threshold and a time delay, TL, are encountered in the transfer process. The product, WLTL, is a logic quantum, HL. if the logic transfer takes place through an intermediate device, a log... View full abstract»

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  • Some Experiments in Spoken Word Recognition

    Publication Year: 1966, Page(s):65 - 79
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (737 KB)

    This paper describes some experimental work in the recognition of limited-size, but arbitrary, vocabularies of spoken words. The equipment consists of a filter-bank voice-spectrum analyzer providing real-time input of measurement data to an IBM 1620-II digital computer system. The computer implements various transformations on the input data and also implements various linear decision functions wh... View full abstract»

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  • An Experiment in Cluster Detection [Letter to the Editor]

    Publication Year: 1966, Page(s):80 - 88
    IEEE is not the copyright holder of this material | PDF file iconPDF (449 KB)
    Freely Available from IEEE
  • The Dispersion Locked Memory Mode for Magnetic Films

    Publication Year: 1966, Page(s):89 - 94
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (416 KB)

    In the usual thin film magnetic memory, that which utilizes the two stable easy direction magnetization states for storage, inverted films (Hc>Hk) are often used to reduce disturb sensitivity. In general, inverted films exhibit a high angular dispersion and an open hard direction hysteresis loop with considerable remanence. Middelhoek has attributed this high remanence... View full abstract»

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  • Dynamic Thermal Response and Voltage Feedback in Junction Transistors

    Publication Year: 1966, Page(s):95 - 97
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (477 KB)

    The transient thermal response of transistor junctions has been described by Mortenson1 and Strickland2 using mathematical and physical models characterized by a number of thermal time constants. Sparkes3 pointed out the dependence of the electrical voltage feedback upon the thermal resistance of transistors, giving a relationship between thermal and electrical par... View full abstract»

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  • Conditions for Termination of the Method of Steepest Descent after a Finite Number of Iterations

    Publication Year: 1966, Page(s):98 - 99
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    Certain problems in mathematical physics can be recast as extremum problems of quadratic functionals. In particular, considerable attention has been givent o them inimization of a quadratic polynomial associated with a bounded and positive semidefinite linear operator T defined on a Hilbert space H, viz., the quadratic polynomial Q(x) = [Tx,x ] − [x, g] − [g, x]w, here g is a fixed e... View full abstract»

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  • Technical Papers by IBM Authors Published Recently in Other Journals

    Publication Year: 1966, Page(s):100 - 107
    IEEE is not the copyright holder of this material | PDF file iconPDF (593 KB)
    Freely Available from IEEE
  • Recent Issued Patents Assigned To IBM

    Publication Year: 1966, Page(s):108 - 109
    IEEE is not the copyright holder of this material | PDF file iconPDF (229 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1966, Page(s):110 - 112
    IEEE is not the copyright holder of this material | PDF file iconPDF (158 KB)
    Freely Available from IEEE
  • Contents of previous two issues

    Publication Year: 1966, Page(s): 112
    IEEE is not the copyright holder of this material | PDF file iconPDF (153 KB)
    Freely Available from IEEE
  • Errata [A Comparison of Pseudo-Noise and Conventional Modulation for Multiple-Access Satellite Communications, by H. Blasbalg]

    Publication Year: 1966, Page(s): 112
    IEEE is not the copyright holder of this material | PDF file iconPDF (176 KB)
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The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

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Clifford A. Pickover
IBM T. J. Watson Research Center