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IRE Transactions on Electronic Computers

Issue 2 • Date June 1959

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Displaying Results 1 - 25 of 36
  • [Front cover]

    Publication Year: 1959, Page(s): c1
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    Freely Available from IEEE
  • IRE Professional Group on Electronic Computers

    Publication Year: 1959, Page(s): nil1
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  • [Breaker page]

    Publication Year: 1959, Page(s): nil1
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  • Richard O. Endres

    Publication Year: 1959, Page(s): 89
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    Freely Available from IEEE
  • The Chairman's Column

    Publication Year: 1959, Page(s):90 - 91
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  • Thin-Film Memories

    Publication Year: 1959, Page(s):92 - 97
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2865 KB)

    A small random-access memory using deposited magnetic thin films as storage elements, and with a cycle time of one microsecond, is described. Information is read from or written into the memory by linear or word selection techniques. The addressing, driving and sensing circuits are transistorized. The deposited thin films are 2000 Å thick, switch in 0.1 ¿sec and generate a 5-mv output signal in ... View full abstract»

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  • Integrated Devices Using Direct-Coupled Unipolar Transistor Logic

    Publication Year: 1959, Page(s):98 - 107
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1946 KB)

    This article presents material that is new in three areas. First, a new logic system using directly-coupled unipolar transistors is analyzed. It is shown that unipolar transistors have important advantages over bipolar transistors in speed, tolerance of stray signals and noise, and device miniaturization. Second, devices of extreme miniaturization built by an integrated device design and using thi... View full abstract»

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  • P-N-Π-N Triode Switching Applications

    Publication Year: 1959, Page(s):108 - 113
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    The characteristics and switching applications of a developmental diffused silicon p-n-π-n triode are discussed. Although this unit is at present in a two-watt package, it is capable of handling short pulses of current of the order of 100 amperes. The electrical characteristics which consist of a low and high conductivity region (over 500 megohms and less than 1 ohm respectively), with an ... View full abstract»

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  • An Electro-Optical Shift Register

    Publication Year: 1959, Page(s):113 - 117
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    An electro-optical shift register composed only of electroluminescent (EL) and photoconductive (PC) cells was designed and successfully operated. While its measured operating speed probably does not make this shift register currently competitive in high-speed applications, it is amenable to construction in an extremely small volume, and has certain other unique characteristics. View full abstract»

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  • Processing Data in Bits and Pieces

    Publication Year: 1959, Page(s):118 - 124
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1594 KB)

    A data-handling unit is described which permits binary or decimal arithmetic to be performed on data fields of any length from one to sixty-four bits. Within the field, character structure can be further specified: these processing entities, called bytes, may be from one to eight bits long. Fields may be stored with or without algebraic sign. On all operations, the relative offset or shift between... View full abstract»

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  • Increasing Reliability by the Use of Redundant Machines

    Publication Year: 1959, Page(s):125 - 130
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (894 KB)

    The improvement of reliability and availability through redundancy of entire machines rather than of components is investigated. An attempt is made to break down the cost of operating a digital computer, and to determine the relationship between cost and system failure. Three specific cases are discussed. Case 1: Where n machines are operated independently, processing the same input data. The outp... View full abstract»

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  • Boolean Matrix Equations in Digital Circuit Design

    Publication Year: 1959, Page(s):131 - 139
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1305 KB)

    A systematic digital computational method is given that involves the use of Boolean matrix equations for solving certain types of functional circuit design problems. Specifically, all sets of Boolean functions f1(A1, . . ., A1), . . ., fJ(A1, - . . ., A1) are found such that if circuits with these outputs are connected to a circuit that generates the known Boolean function F(f1, . . . , fJ, X1, . ... View full abstract»

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  • The Residue Number System

    Publication Year: 1959, Page(s):140 - 147
    Cited by:  Papers (108)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1286 KB)

    A novel number system called the residue number system is developed from the linear congruence viewpoint. The residue number system is of particular interest because the arithmetic operations of addition, subtraction and multiplication may be executed in the same period of time without the need for carry. The main difficulties of the residue code pertain to the determination of the relative magnit... View full abstract»

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  • Bibliography of Digital Magnetic Circuits and Materials

    Publication Year: 1959, Page(s):148 - 158
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2643 KB)

    A list of about 400 references relating to magnetic memory and logic circuits has been made. The bibliography is divided into 19 sections. Several sections are devoted to the physical, magnetic, and switching parameters of magnetic materials. Other parts cover the circuit and logical aspects of using magnetic cores, plates, ``twistors,'' thin films, and transfluxors. Attention is given to the use ... View full abstract»

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  • The Recording and Reproduction of Signals on Magnetic Medium Using Saturation-Type Recording

    Publication Year: 1959, Page(s):159 - 169
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2488 KB)

    This paper discusses the various factors affecting the resolution in saturation magnetic recording. The effect on the recording process of the B-H characteristics of the coating, coating thickness, record-head gap width, head-to-coating separation, self-demagnetization, and record-head residual magnetization are discussed. Equations are derived for the playback process relating the signal amplitud... View full abstract»

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  • Magnetic Core Logic in a High-Speed Card-to-Tape Converter

    Publication Year: 1959, Page(s):169 - 181
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3302 KB)

    This report describes a static magnetic shift circuit and the logical connectives derived from it. The prime advantages of magnetic circuits are their low cost, high reliability, and ease of maintenance. The application of these circuits to the design of a card-to-tape converter is discussed. View full abstract»

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  • The Use of a Repetitive Differential Analyzer for Finding Roots of Polynomial Equations

    Publication Year: 1959, Page(s):182 - 185
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1164 KB)

    The paper describes a procedure for obtaining real and complex roots of algebraic equations with real or complex coefficients by the use of a repetitive differential analyzer. The procedure requires only operational amplifiers and ganged linear potentiometers. Differential analyzers are very suitable for solving algebraic equations since they permit visual checking of the procedure and make it pos... View full abstract»

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  • A High-Speed Analog-Digital Computer for Simulation

    Publication Year: 1959, Page(s):186 - 197
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2434 KB)

    This paper describes the principles of operation and logical design of an analog-digital computer capable of simulating complex physical systems in real time. Information in the machine is represented by an analog voltage pulse and a digital number. Arithmetic operations are performed in time-shared analog computing components and conventional digital logical elements. A novel floating-point arith... View full abstract»

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  • Distributed Parameter Vibration with Structural Damping and Noise Excitation

    Publication Year: 1959, Page(s):197 - 200
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    A method is described for the electronic analog computer that will permit the determination of the vibration amplitude responses of a distributed system with structural damping to a random-noise excitation such as might be experienced by a missile structure accelerated by a jet propulsion system. There is general agreement among the investigators in the literature that structural damping is both f... View full abstract»

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  • Optimization by Random Search on the Analog Computer

    Publication Year: 1959, Page(s):200 - 203
    Cited by:  Papers (1)
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    One method of searching a system for optimum operating conditions is to evaluate system performance for many randomly-chosen combinations of the independent parameters. This paper explains the use of standard electronic analog computer equipment to accomplish such a search of a mathematical model quickly and economically. Gaussian noise sources generate values of the independent parameters and sam... View full abstract»

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  • Linear System Approximation by Differential Analyzer Simulation of Orthonormal Approximation Functions

    Publication Year: 1959, Page(s):204 - 209
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (917 KB)

    Various analytic procedures have been proposed for minimum integral-square-error approximation of prescribed linear systems; however, they often involve computational difficulties. In the procedure developed in this paper, a group of N linear approximating systems with orthonormal impulse responses ¿n(t) are realized by operational amplifier circuits. When h(-t) forces the systems (h(t) is the im... View full abstract»

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  • Generalized Integration on the Analog Computer

    Publication Year: 1959, Page(s):210 - 217
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3883 KB)

    One of the major limitations of the electronic analog computer is its inability to perform directly an integration with respect to a dependent variable. This paper reviews the usual methods of overcoming this limitation, describes the results on an attempt to use Padé time-delay units in generalized integration, and presents the development of a new analog integrator based on a simple numerical i... View full abstract»

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  • A Perturbation Technique for Analog Computers

    Publication Year: 1959, Page(s):218 - 221
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (539 KB)

    A study of the motion of a fin-stabilized rocket was undertaken to determine the effect of perturbing forces on the trajectory. The mechanization of a complete problem for an analog computer to include small disturbing forces would result in trajectories which are essentially indistinguishable from the ``nominal'' or ``unperturbed'' case because of analog computer accuracy limitations. Instead, th... View full abstract»

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  • A Four-Quadrant Multiplier Using Triangular Waves, Diodes, Resistors, and Operational Amplifiers

    Publication Year: 1959, Page(s):222 - 227
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1109 KB)

    A simple scheme of switching triangular waves and measuring the average current through resistors into a low impedance summing point makes possible four-quadrant multiplication with four diodes, precisely adjusted resistors, and a means of measuring the current. A practical circuit utilizes one operational amplifier to obtain -(X+Y)/2 and a second such unit to measure the summing point current. Ad... View full abstract»

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  • Dual-Polarity Logic as a Design Tool

    Publication Year: 1959, Page(s):227 - 228
    Cited by:  Papers (1)
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    First Page of the Article
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Aims & Scope

This Transactions ceased publication in 1962. The current retitled publication is 

IEEE Transactions on Computers.

Full Aims & Scope