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IBM Journal of Research and Development

Issue 3 • Date March 1981

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Displaying Results 1 - 15 of 15
  • Preface

    Publication Year: 1981, Page(s): 106
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (114 KB)

    Rapid progress in miniaturization and integration has brought the computer and semiconductor industries to the brink of a new era of microelectronics. This is the era of VLSI, Very Large Scale Integration. Its goal is to design and develop a reliable andreproducible high-density fabrication process that can yield semiconductor chips containing a million or more devices. View full abstract»

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  • Techniques for Improving Engineering Productivity of VLSI Designs

    Publication Year: 1981, Page(s):107 - 115
    Cited by:  Papers (7)  |  Patents (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (811 KB)

    The ability of the semiconductor industry to produce chips with higher and higher circuit densities has created a challenge for the product designer: to utilize this capacity and still develop chips rapidly at reasonable cost. A multi-faceted approach to VLSI design is described that significantly reduces product development time and resource from those required with existing methods. This approac... View full abstract»

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  • Bipolar Circuit Design for a 5000-Circuit VLSI Gate Array

    Publication Year: 1981, Page(s):116 - 125
    Cited by:  Papers (6)  |  Patents (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (847 KB)

    Ever-increasing gate-array chip circuit count and size pose challenges to the circuit designer, who must optimize the cell layout and power dissipation of logic circuits. This paper describes the design of a bipolar gate array for a 5000-circuit microprocessor. The physical design data obtained after completion of automatic placement and wiring are presented. The distribution of projected circuit ... View full abstract»

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  • A 1024-Byte ECL Random Access Memory Using a Complementary Transistor Switch (CTS) Cell

    Publication Year: 1981, Page(s):126 - 134
    Cited by:  Papers (2)  |  Patents (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (571 KB)

    This paper presents the design of a 1K-byte random access memory using a cross-coupled complementary transistor switch (CTS) cell. The memory operates with a 4.25-V power supply and achieves a 15-ns access time with a power dissipation of 1.8 W. This paper also demonstrates the advantages of using the CTS cell to achieve high circuit density and good performance of memory arrays. Array attributes,... View full abstract»

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  • Delay Regulation—A Circuit Solution to the Power/Performance Tradeoff

    Publication Year: 1981, Page(s):135 - 141
    Cited by:  Patents (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (438 KB)

    This paper introduces the concept of delay regulation as a means of controlling circuit delay variations from chip to chip, which is especially important in VLSI products. An embodiment of this concept which applies a phase-locked loop to individually control chip performance and power is presented together with computer-simulated results of an example design. It is shown that accurate delay equat... View full abstract»

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  • A High-Density Bipolar Logic Masterslice for Small Systems

    Publication Year: 1981, Page(s):142 - 151
    Cited by:  Papers (3)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (677 KB)

    A new high-density bipolar logic masterslice which uses a simple Schottky Transistor Logic (STL) circuit cell as its basic building block is presented in this paper. The STL cell is derived from Integrated Injection Logic (I2L). The use of low-barrier Schottky diodes for AND logic, as diodes function in Diode Transistor Logic (DTL), makes possible achieving the NAND circuit operation. A... View full abstract»

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  • Wire Length Distribution for Placements of Computer Logic

    Publication Year: 1981, Page(s):152 - 155
    Cited by:  Papers (75)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (327 KB)

    It is shown from simple theoretical considerations that the distribution ƒk of wire lengths for a good two-dimensional placement on a square Manhattan grid should be of the form ƒk = g/kγ (1 ≤ k ≤ L) and ƒk ≈ 0 (k > L), where γ is related to the Rent partitioning exponent p by the equation 2p... View full abstract»

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  • High-Speed Binary Adder

    Publication Year: 1981, Page(s):156 - 166
    Cited by:  Papers (94)  |  Patents (22)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (520 KB)

    Based on the bit pair (ai, bi) truth table, the carry propagate pi and carry generate gi have dominated the carry-look-ahead formation process for more than two decades. This paper presents a new scheme in which the new carry propagation is examined by including the neighboring pairs (ai, bi; ai+1, bi+1). This ... View full abstract»

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  • Statistics of Breakdown

    Publication Year: 1981, Page(s):167 - 175
    Cited by:  Papers (5)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (681 KB)

    A derivation is given for the statistics of breakdown, including the effect of defects. The particular case where breakdowns are random in time and defects are randomly distributed is considered in detail. Results are obtained that are applicable to any kind of breakdown test. It is shown how relationships between the breakdown distributions for various breakdown tests and for different conditions... View full abstract»

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  • Attraction Force Characteristics Engendered by Bounded, Radially Diverging Air Flow

    Publication Year: 1981, Page(s):176 - 186
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (853 KB)

    When axially directed air flow enters a parallel plate passage through a hole in one of the plates, the ensuing diverging radial flow is such that a depressed pressure region occurs to some extent over the inlet region of the passage. If the plate against which the inlet air stream impinges is allowed to move freely, it will, under proper flow and other conditions, assume a position of stable equi... View full abstract»

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  • An On-Line Chinese Character Recognition System

    Publication Year: 1981, Page(s):187 - 195
    Cited by:  Papers (10)  |  Patents (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (650 KB)

    This paper describes an experimental system for the on-line recognition of handwritten Chinese characters. Constituent shapes of the characters are recognized as they are formed on an electronic tablet. The 72 constituent shapes can define a very large set of Chinese characters. The implementation described recognizes more than 2200 Chinese characters. More symbols can be added with relative ease.... View full abstract»

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  • A Magnetic Sensor Utilizing an Avalanching Semiconductor Device

    Publication Year: 1981, Page(s):196 - 201
    Cited by:  Papers (2)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (470 KB)

    A new semiconductor device for sensing uniaxial magnetic fields has been realized. The device is basically a dual-collector open-base lateral bipolar transistor operating in the avalanche region, and is referred to as a Magnetic Avalanche Transistor. It exhibits high magnetic transduction sensitivity compared to traditional Hall-effect and conventional nonlinear magnetoresistive devices. Several h... View full abstract»

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  • Recent Papers by IBM Authors

    Publication Year: 1981, Page(s):202 - 209
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (678 KB)

    Reprints of the papers listed here may usually be obtained by writing directly to the authors. The authors' IBM divisions are identified as follows: CHQ is Corporate Headquarters; DPD, Data Processing Division; DSD, Data Systems Division; FED, Field Engineering Division; FSD, Federal Systems Division; GPD, General Products Division; GSD, General Systems Division; GTD, General Technology Division; ... View full abstract»

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  • Recent IBM Patents

    Publication Year: 1981, Page(s):210 - 212
    IEEE is not the copyright holder of this material | PDF file iconPDF (245 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1981, Page(s):213 - 216
    IEEE is not the copyright holder of this material | PDF file iconPDF (359 KB)
    Freely Available from IEEE

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