{"title":"A wide-band square-law computing amplifier","authors":"A. Soltes","doi":"10.1109/IREPGELC.1954.6499419","DOIUrl":"https://doi.org/10.1109/IREPGELC.1954.6499419","url":null,"abstract":"Wide-hand computing amplifiers capable of accurately and continuously yielding output signals with amplitudes proportional to the mathematical square of their input amplitudes have been developed. These computers are designed to be inserted in signal channels in much the same manner as conventional amplifiers, but impart thereto a square-law transfer characteristic. Details are given concerning a model that provides an accuracy of the order of 1 per cent of full scale over an output dynamic range of 40 db when operating on fractional microsecond, pulsed carrier signals.","PeriodicalId":304144,"journal":{"name":"Trans. I R E Prof. Group Electron. Comput.","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1954-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129701317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An operational-digital feedback divider","authors":"M. A. Meyer, B. M. Gordon, R. N. Nicola","doi":"10.1109/IREPGELC.1954.6499435","DOIUrl":"https://doi.org/10.1109/IREPGELC.1954.6499435","url":null,"abstract":"The following article describes a device capable of finding the quotient of two numbers expressed in parallel binary code. Feedback type of operation is employed to form a closed loop wherein the desired quotient is the only possible steady state. The system response is similar to that of an RC circuit. The associated time constant is directly proportional to the pulse rate involved. This device has been successfully applied in control circuits where system variables are actual numbers rather than more common voltages or currents.","PeriodicalId":304144,"journal":{"name":"Trans. I R E Prof. Group Electron. Comput.","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1954-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124302997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Professional group on electronic computers system organization of the DYSEAC","authors":"A. L. Leiner, S. N. Alexander","doi":"10.1109/IREPGELC.1954.6499433","DOIUrl":"https://doi.org/10.1109/IREPGELC.1954.6499433","url":null,"abstract":"The DYSEAC is a complete general-purpose high-speed digital computer utilizing the same basic electronic circuit elements as those in SEAC. In the DYSEAC, however, these basic building blocks have been organized into a more powerful system for controlling and responding to auxiliary devices. Communication between these auxiliary devices and the DYSEAC (or between the DYSEAC and the persons operating it) can take place at any time, on a completely unscheduled basis, at the instigation of either the computer or the external world, or both acting jointly. The System features which enable such impromptu interchanges of information to occur are described in this paper.","PeriodicalId":304144,"journal":{"name":"Trans. I R E Prof. Group Electron. Comput.","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1954-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121899269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A time-sharing analog multiplier","authors":"H. Freeman, E. Parsons","doi":"10.1109/IREPGELC.1954.6499434","DOIUrl":"https://doi.org/10.1109/IREPGELC.1954.6499434","url":null,"abstract":"This article describes the design of a high speed electronic analog computing circuit which easily lends itself to time-sharing applications. By making use of a special high accuracy electronic switch and circuitry carefully designed to be independent of tube characteristics, it was possible to achieve a full-scale accuracy of better than 0.2 per cent over a wide range of input values. The unit described was built to carry out 400 complete multiplications and divisions in one second.","PeriodicalId":304144,"journal":{"name":"Trans. I R E Prof. Group Electron. Comput.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1954-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127937226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Model II Unityper","authors":"Louis D. Wilson, Saul Meyer","doi":"10.1109/IREPGELC.1953.5407690","DOIUrl":"https://doi.org/10.1109/IREPGELC.1953.5407690","url":null,"abstract":"This paper relates some of the considerations that led the designers to develop the all-mechanical Model II Unityper, in order to achieve a smaller, less expensive input transcriber than the larger electronic first model. Operational characteristics are discussed, and the relationship of the unit to the rest of the computing system is given.","PeriodicalId":304144,"journal":{"name":"Trans. I R E Prof. Group Electron. Comput.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1953-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117133265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Computer Definitions [Guest Editorial]","authors":"N. Rochester, W. Ware","doi":"10.1109/IREPGELC.1953.5407686","DOIUrl":"https://doi.org/10.1109/IREPGELC.1953.5407686","url":null,"abstract":"This guest editorial notes that in the preparation of this glossary, there was no intention to dictate what language people should use. Instead the policy of other compilers of dictionaries was used. The intent was to record usage, considering both the extent of usage and just who uses certain terms in certain ways. The policy of recording usage appears to be the only way to aid in eliminating dialects without stifling progress.","PeriodicalId":304144,"journal":{"name":"Trans. I R E Prof. Group Electron. Comput.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1953-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126803489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Automatic Beam Current Stabilization for Williams Tube Memories","authors":"R. J. Klein","doi":"10.1109/IREPGELC.1953.5407688","DOIUrl":"https://doi.org/10.1109/IREPGELC.1953.5407688","url":null,"abstract":"One difficulty encountered in the operation of the Williams type electrostatic memory is the critical nature of the storage tube beam current. Ordinarily, frequent adjustment is required to maintain this parameter within the reliable operating region. By the use of a simple circuit the adjustment may be made automatically resulting in increased reliability and ease of operation.","PeriodicalId":304144,"journal":{"name":"Trans. I R E Prof. Group Electron. Comput.","volume":"185 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1953-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123246806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Accuracy of an Analog Computer","authors":"Lee Cahn","doi":"10.1109/IREPGELC.1953.5407689","DOIUrl":"https://doi.org/10.1109/IREPGELC.1953.5407689","url":null,"abstract":"1. To determine how accurate the computing components representing a given variable have to be, assume that they constitute one more piece of measuring equipment which must handle the data before it is fed into an ideal computer. 2. In general, the components of an analog computer must have individual accuracies consistent with the measuring equipment available to the group it belongs to. 3. The static accuracy of an operational amplifier may be measured simply by observing the grid voltage in a closed-loop connection as the output is swung through its full range at some low frequency (Fig. 2). Phase shift may be measured simply (Fig. 3), but usually does not play an important part in establishing limits of performance for the computer. 4. Integrator random drift may be measured simply, but is only one cause contributing to integrator error. Account should be taken of the grid deviations measured in the static test above, or else drift measured about a number of non-zero output levels. 5. The effect of integrator drift is to limit the computing time. Required computing time and highest required frequency are determined directly for real-time simulation. In other computing, one may be traded for the other, so long as the product R remains constant. R is the number of cycles of the highest frequency contained in the longest time. Two computers may be compared by comparing their R's; comparing drift rates, computing times, or maximum frequencies alone is not valid.","PeriodicalId":304144,"journal":{"name":"Trans. I R E Prof. Group Electron. Comput.","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1953-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129822320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Solution of Linear Differential Equations with Variable Coefficients by the Electronic Differential Analyzer","authors":"C. E. Howe, R. Howe","doi":"10.1109/IREPGELC.1953.5407687","DOIUrl":"https://doi.org/10.1109/IREPGELC.1953.5407687","url":null,"abstract":"A relay device is described which varies resistance in a stepwise continuous manner in order to approximate arbitrary functions of time. The device can be used with electronic differential analyzers to solve linear differential equations with variable coefficients. Sample solutions of Bessel's equation are included as examples. Calibration and measurement techniques which permit computer accuracies, of several hundredths of a percent are discussed.","PeriodicalId":304144,"journal":{"name":"Trans. I R E Prof. Group Electron. Comput.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1953-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116593556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The UNIVAC Tube Program","authors":"Thomas D. Hinkelman, M. H. Kraus","doi":"10.1109/IREPGELC.1953.5407733","DOIUrl":"https://doi.org/10.1109/IREPGELC.1953.5407733","url":null,"abstract":"This paper presents the history of the tube program evolved for the UNIVAC system. It shows that reliable performance of vacuum tubes in large scale computers can be achieved by an integrated program, starting with design and initial tube selection, and covering pre-installation process-and marginal checking. Performance data on four UNIVACS are used to illustrate the success of the program, with data on UNIVAC # 1 covering 16,000 hours of operation.","PeriodicalId":304144,"journal":{"name":"Trans. I R E Prof. Group Electron. Comput.","volume":"383 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1953-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116001494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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