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American Institute of Electrical Engineers, Part I: Communication and Electronics, Transactions of the

Issue 2 • Date May 1961

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Displaying Results 1 - 21 of 21
  • Digital telemetering techniques

    Publication Year: 1961 , Page(s): 81 - 90
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2735 KB)  

    Digital telemetering is an information transmission operation in which meter information is processed from source to receiving point in digital form. In the operation, the information is developed in digital form at the source, is transmitted in this form over a long-distance link, and is digitally received and processed at the receiving point. This definition demands, in turn, a definition of dig... View full abstract»

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  • An analysis of errors in the calibration of electric instruments

    Publication Year: 1961 , Page(s): 90 - 95
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2314 KB)  

    It has often been stated that the standards and equipment used to calibrate an electric instrument, or other electric measuring apparatus, should be ten times as accurate as the instrument being tested. This rule-of-thumb usually leads to impossible demands on the accuracy of the standards, particularly if more than two echelons of standards are involved. Troublesome problems should be expected in... View full abstract»

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  • A 20,000-ampere mechanical switch

    Publication Year: 1961 , Page(s): 96 - 98
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (952 KB)  

    In june 1958, the Lawrence Radiation Laboratory contracted with Stanford Research Institute for the development of a mechanical crowbar-type switch. At that time Radiation Laboratory personnel were conducting experiments using the basic high-power L-R-C (inductance-resistance-capacitance) circuit shown in Fig. 1. In this circuit, the ignitron V2 is subjected to excessive duty when heavily loaded. ... View full abstract»

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  • Antenna matching unit for high-frequency vehicular whip

    Publication Year: 1961 , Page(s): 99 - 104
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2975 KB)  

    This paper describes the design details and performance of an automatic impedance matching unit designed to operate with a vehicular communication equipment consisting of a receiver-transmitter and a 10-foot whip antenna. View full abstract»

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  • Telegraph distortion and distortion measuring

    Publication Year: 1961 , Page(s): 104 - 109
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4477 KB)  

    The definition of distortion with the resulting conclusions is of fundamental importance in determining the reliability of telegraph transmission circuits, judging the quality of the component sections, assessing maintenance requirements, and planning teleprinter networks. Being aware of this importance, the CCIT (International Telegraph Consultative Committee, since 1957 CCITT, International Tele... View full abstract»

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  • The theory of a single-ring circular antenna array

    Publication Year: 1961 , Page(s): 110 - 115
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1696 KB)  

    The single-ring circular antenna array of axial dipoles is analyzed in this paper. Such an array consists of m parallel dipoles, equally spaced on the circumference of a circle whose radius is ¿. The two principal properties with which a designer is concerned are (1) the radiation pattern and (2) the impedance of each element in an array, both of which can be found if the current distribution alo... View full abstract»

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  • A proposed electronic method for high-speed teleprinters

    Publication Year: 1961 , Page(s): 115 - 117
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (876 KB)  

    It is a common experience among communication engineers today that much telegraph apparatus which was originally developed for conventional telegraph applications is finding increasing use in other fields, notably in the developing art of data communication. This factor has its inevitable influence on the design of telegraph equipment. In this paper a new method for transmission and reception of t... View full abstract»

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  • A low-cost number identifier for small telephone systems

    Publication Year: 1961 , Page(s): 117 - 121
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2149 KB)  

    Inability to determine, accurately and economically, the calling line number in connection with direct distance dialing has hindered the extension of this service to small telephone systems. Manual identification methods, while relatively low in equipment costs, are vulnerable to operator error and subscriber fraud. On the other hand, most currently available automatic number identification equipm... View full abstract»

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  • A completely transistorized 600-channel multiplex system

    Publication Year: 1961 , Page(s): 121 - 126
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2959 KB)  

    The past 10 years have brought forth few improvements in long-haul telephone carrier systems, despite steadily-increasing consumer demands. Existing carrier systems were designed primarily for the transmission of speech and have been used mainly for that and for telegraphic transmissions. The common carriers, independents, and private and government-owned systems have done a remarkable job in prov... View full abstract»

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  • Telephone circuit and equipment impedances as they affect transmission performance

    Publication Year: 1961 , Page(s): 126 - 134
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2426 KB)  

    The direct distance dialing (DDD) telecommunications network used throughout the nation and extending into other nations consists of many complex elements. One of the problems involves providing quantity and quality in a talking or data connection. The following good transmission engineering practices will result in providing the grade of service necessary, limited only by economic considerations.... View full abstract»

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  • On the elimination of null in modulating and demodulating devices

    Publication Year: 1961 , Page(s): 135 - 139
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1265 KB)  

    A method of design is proposed for electromagnetic a-c to d-c and d-c to a-c conversion devices which largely eliminates the interdependence of bias voltage and dynamic range. This is achieved by using a model approach which divorces the output null from the dynamic range. Test results have proved the method achieves the desired results without affecting the characteristics of the basic device. View full abstract»

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  • A method of calculating gain and phase margins from pole-zero diagrams

    Publication Year: 1961 , Page(s): 139 - 143
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1207 KB)  

    Gain margin and phase margin are important quantities in the description of the performance of feedback systems since they are an accurate measure of relative stability. Their usefulness lies in the fact that they are easily calculated and that their variation with changes in system parameters is easily determined. View full abstract»

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  • Movement of air in the electric wind of the corona discharge

    Publication Year: 1961 , Page(s): 143 - 150
    Cited by:  Papers (14)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2544 KB)  

    The mechanism of gas movement in the electric wind is considered herein, and an approximate theory presented which relates relevant electrical and aerodynamic quantities. Among others, these relationships are shown to hold for an electrostatic blower, operating on the electric-wind principle: Gas velocity is a linear function of voltage and is proportional to the square root of current; if the den... View full abstract»

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  • A low-level linear rundown circuit for pulse-height to pulse-width conversion

    Publication Year: 1961 , Page(s): 150 - 152
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (881 KB)  

    The two-transistor linear rundown circuit analyzed here is desirable because of its size and economy. The circuit uses one transistor for the constant-current generator and another for an emitter-follower. Waveforms obtained from both experimental and theoretical analysis correlated well enough to plot them as a single waveform. With the addition of a differentiating circuit, this rundown circuit ... View full abstract»

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  • A new magnetic-controlled rectifier power amplifier with a saturable reactor controlling on time

    Publication Year: 1961 , Page(s): 152 - 155
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1339 KB)  

    There is an increasing demand for high-efficiency fast-responding high-gain compact economical power amplifiers. There is need to accomplish these demands by a single unit which can provide a higher degree of economy and compactness than has previously been achieved. The combination of switching, semiconductors and saturable magnetic devices provides a solution for many of these demands. The silic... View full abstract»

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  • Pulse discharges preceding sparkover at low voltage gradients

    Publication Year: 1961 , Page(s): 156 - 162
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2928 KB)  

    Breakdown of gases between clean metallic electrodes has been studied extensively and has resulted in an acceptable explanation for sparkover where the gradient is of the order of 30 kv/cm (kv per centimeter) or more, but it does not explain the sparkovers which occasionally occur in high-voltage apparatus where the gradient appears to be nearer 5 than 30 kv/cm. A previous paper1 has shown that fo... View full abstract»

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  • Commutation and destructive oscillation in diode circuits

    Publication Year: 1961 , Page(s): 162 - 172
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3027 KB)  

    Since the introduction of single crystal rectifier cells, the switching action from the forward- to the reverse-biased condition, in other words commutation, frequently has been analyzed. In the early stages of germanium and silicon rectifiers, destruction of cells was often caused by this commutation action. After the application of parallel capacitors or filtering circuits, the troubles were eli... View full abstract»

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  • An experimental study on the ampere-turn gain of ordinary saturable reactors

    Publication Year: 1961 , Page(s): 173 - 178
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2143 KB)  

    Actual deviations of the ordinary saturable-reactor control characteristic from the ideal 45-degree line have been measured directly by means of a differential-type test circuit, using bifilar saturable-reactor windings, which secure correct turns ratio and eliminate magnetic leakage. Three magnetic-amplifier core materials (Silectron, Orthonol, and Supermalloy) have been investigated in this way,... View full abstract»

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  • Transistor morse-to-teleprinter code converter

    Publication Year: 1961 , Page(s): 178 - 181
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1842 KB)  

    When facing the objective of automatically printing radio Morse copy on a teleprinter, the necessity for both signal processing and code conversion are clear. Equipment for performing four necessary functions are herein described. This equipment must: 1. Tune the receiver automatically. 2. Process the Morse-coded signal to remove noise and distortion. 3. Convert between the Morse and teleprinter c... View full abstract»

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  • The synthesis of general parameter insertion loss filters using a digital computer

    Publication Year: 1961 , Page(s): 181 - 186
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1606 KB)  

    A problem often encountered in practical network design is the synthesis of filters which satisfy various frequency-dependent requirements in the stop band and exhibit Tchebyshev behavior in the pass band. The theory of such networks, usually called general parameter filters, was founded by Darlington1 and treated in detail by German authors.2¿4 As the amount of numerical calculations encountered... View full abstract»

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  • A fatigue-free silicon device structure

    Publication Year: 1961 , Page(s): 186 - 192
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3184 KB)  

    Germanium devices, when correctly used, are capable of essentially infinite life. It was commonly assumed in early higher temperature semiconductor work that silicon devices and those of materials, such as silicon carbide and III-V compounds would have similar life expectancy. That this is not realized in soft-soldered silicon devices is now well established. Evidence is presented to show that thi... View full abstract»

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Aims & Scope

This Transactions ceased publication in 1963. The current retitled publication is  IEEE Transactions on Communications.

Full Aims & Scope