Scheduled System Maintenance
On Friday, October 20, IEEE Xplore will be unavailable from 9:00 PM-midnight ET. We apologize for the inconvenience.
Notice: There is currently an issue with the citation download feature. Learn more.

IBM Journal of Research and Development

Issue 2 • March 1975

Filter Results

Displaying Results 1 - 15 of 15
  • An Introduction to Array Logic

    Publication Year: 1975, Page(s):98 - 109
    Cited by:  Papers (88)  |  Patents (28)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (950 KB)

    After a discussion of the reasons for choosing to implement logic in array form, a detailed description of the nature of array logic is given. Topics specifically discussed include general array structures and implementation, influence of decoder partitioning, design of logic arrays, output phase, “split” variables, feedback in logic arrays, and reconfiguration. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Hardware Implementation of a Small System in Programmable Logic Arrays

    Publication Year: 1975, Page(s):110 - 119
    Cited by:  Papers (10)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (845 KB)

    Large Scale Integration, LSI, is the means by which digital circuits have achieved remarkable manufacturing cost reductions but, unfortunately, at the expense of higher engineering design costs. Programmable Logic Arrays, PLAs, exploit many of the benefits of LSI but without the high engineering design costs. This paper describes an experiment in the design and implementation of a small complex sy... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Array Logic Macros

    Publication Year: 1975, Page(s):120 - 126
    Cited by:  Papers (12)  |  Patents (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (589 KB)

    A macro design approach is discussed which combines the cost-effective attributes of array logic structures with those of random logic. These macros utilize the following features: (a) internal feedback registers for performing sequential logic, (b) masking and submasking to reduce the number of words in the array for certain functions, (c) control of the array's output level to vary the apparent ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Polarization and Depolarization in PSG Films

    Publication Year: 1975, Page(s):127 - 132
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (486 KB)

    The temperature dependence of the polarization in thin phosphosilicate glass (PSG) films is characterized by an activation energy ΔH = (0.39 + 0.039Et) eV, whereas the decay mechanism has an activation energy of 0.5 eV. The flatband voltage shift due to PSG polarization was linear with applied fields as large as 5.5 × 106 V · cm−1. The effective ti... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Storage Hierarchy Optimization Procedure

    Publication Year: 1975, Page(s):133 - 140
    Cited by:  Papers (8)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (688 KB)

    The goal of storage hierarchies is to combine several storage technologies in such a way as to approach the performance of the fastest component technology and the cost of the least expensive one. This paper presents optimization techniques for a storage hierarchy subject to quantity-sensitive component costs. It is assumed that a finite (and probably small) set of technologies is available. Each ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Block-oriented Information Compression

    Publication Year: 1975, Page(s):141 - 145
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (506 KB)

    Data base statistics play an important role in conventional information compression. For a large data base, the acquisition of data base statistics becomes a very difficult task. This paper presents a new scheme for information compression that does not use information statistics. Each information block is represented by two sub-blocks called the alphabet and the generator. The alphabet contains t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High Speed Transistor with Double Base Diffusion

    Publication Year: 1975, Page(s):146 - 150
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (511 KB)

    A high speed bipolar transistor has been fabricated by using double base diffusion to reduce the base resistance RB. The base resistance forms two important time constants, RBCD and RBCC(RL/RE) with the emitter diffusion capacitance CD and collector capacitance CC dominating the switching delay of th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On Dislocations in GaAs1−xPx

    Publication Year: 1975, Page(s):151 - 162
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1225 KB)

    Misfit dislocations in epitaxially grown layers of GaAs1−xPx with a lattice constant gradient are examined by transmission electron microscopy. In specimens with (113) A growth planes, they form a three-dimensional arrangement of glissile and sessile dislocations. Cross slip is an important process in the generation of the dislocations. High resolution microscopy shows... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • What Is a Multilevel Array?

    Publication Year: 1975, Page(s):163 - 169
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (681 KB)

    In intuitive terms, a multilevel array is either a scalar or an array each of whose elements is a multilevel array. The “semantics” of multilevel arrays can be easily expressed in terms of a notion of selector, which is basically that of the Vienna Definition Language. These selectors provide both a notational device for accessing multilevel arrays and a clean mathematical definition... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Combinatorial Solution to the Partitioning of General Graphs

    Publication Year: 1975, Page(s):170 - 180
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (838 KB)

    This paper reviews a dynamic programming procedure for the partitioning of connected graphs with integer-weighted nodes and positive valued edges. The upper bound on the number of feasible partitions generated using this technique is shown to grow factorially in the number of graph nodes. The use of graph properties is then introduced to reduce the number of feasible partitions generated in the de... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Automatic Structuring of Programs

    Publication Year: 1975, Page(s):181 - 194
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1054 KB)

    A method is described that allows the translation of a traditionally written (unstructured) program into a set of top-down structured, semantically founded, GOTO-free modules. The method reveals not only the logic of a given program in a most natural way, but it also reduces code duplication to a minimum. It is further shown how the obtained structured program can be mapped back into a GOTO progra... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Recent papers by IBM authors

    Publication Year: 1975, Page(s):195 - 197
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (363 KB)

    Reprints of the papers listed here may usually he obtained by writing directly to the authors. The authors' IBM divisions are identified as follows: ASDD is the Advanced Systems Development Division; DPD, Data Processing Division; FED, Field Engineering Division; FSD, Federal Systems Division; CPD, General Products Division; GSD, General Systems Division; OPD, Office Products Division; RES, Resear... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Recent IBM patents

    Publication Year: 1975, Page(s):198 - 200
    IEEE is not the copyright holder of this material | PDF file iconPDF (282 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1975, Page(s):201 - 204
    IEEE is not the copyright holder of this material | PDF file iconPDF (407 KB)
    Freely Available from IEEE
  • Contents of previous issues

    Publication Year: 1975, Page(s):205 - 208
    IEEE is not the copyright holder of this material | PDF file iconPDF (287 KB)
    Freely Available from IEEE

Aims & Scope

Meet Our Editors

Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center