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

Issue 6 • Date Jan. 1953

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Displaying Results 1 - 8 of 8
  • Magnetic amplifiers of the self-balancing potentiometer type

    Publication Year: 1953 , Page(s): 383 - 395
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    This paper describes a new type of magnetic amplifier having inherent self-balancing potentiometer characteristics. By means of a special compound feedback circuit, extreme stability and the fulfillment of balance conditions in the control circuit are obtained. Positive external feedback or self-feedback produces an effectively infinite gain that is highly degenerated by negative feedback resistance-coupled into the control circuit loop. Thus, in the case of voltage, as well as current input, the balanced control circuit demands practically no energy from the input source. The effective input resistance of a self-balancing magnetic amplifier for voltage measurements is about 100 to 1,000 times higher than the actual input circuit loop resistance; the effective input resistance of a self-balancing magnetic amplifier for current measurements is about 100 to 1,000 times smaller than the actual resistance of the control windings. View full abstract»

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  • Ferroelectric materials as storage elements for digital computers and switching systems

    Publication Year: 1953 , Page(s): 395 - 401
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    THE growing need for improved types of data storage systems in both the digital computer and telephone switching fields has led to the investigation of ferroelectric materials as memory devices. Among the objectives in developing these devices have been low power consumption while storing or reading out information, memory access times of 1 microsecond or less, small size per bit of memory, simplified low cost construction, and high reliability. This paper presents an explanation of the operation of a basic storage circuit employing a ferroelectric material, requirements for suitable materials, descriptions of several types of circuits employing ferroelectrics, and experimental data obtained with operating circuits. View full abstract»

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  • Radio interference control

    Publication Year: 1953 , Page(s): 401 - 413
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    RADIO receivers respond to radio transmitters by virtue of antennas which couple them both to free space. As compared with wires, free space is an inefficient coupling medium, and it has erratic efficiency changes. These changes are well known as fading, skip, and sporadic effects, which vary with distance, direction, frequency, and time. View full abstract»

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  • A new general-purpose relay for telephone switching systems

    Publication Year: 1953 , Page(s): 413 - 428
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    THIS paper describes a new general-purpose electromagnetic relay for use in telephone switching systems. It is a wire spring relay known as the AF-type relay and, with variations which provide slow release or marginal characteristics, it is known as the AG and AJ relay respectively. Figure 1 shows a typical AF-type relay, Figure 2 shows all of the parts of the relay, and Figure 3 shows the relay assembly. View full abstract»

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  • Type-O carrier telephone

    Publication Year: 1953 , Page(s): 428 - 437
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    TYPE-O carrier, the most recent addition to the carrier series, is designed to supply additional telephone circuits to the many communities served by open-wire facilities. This new system supplements, rather than supersedes, the older open-wire systems such as types C, H, and J. Type-C and J carrier systems were designed primarily for long circuits, 2,000 miles or more, and consequently cost more than buying new wire for short distances. This leaves an important field of use for an economical short-haul carrier system, particularly below 150 miles. View full abstract»

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  • Design improvements and operating experience with 10-Kc network analyzers

    Publication Year: 1953 , Page(s): 437 - 442
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    IN 1946, the authors disclosed a new design for an a-c network analyzer1 operating at 10,000 cycles. The pilot-model analyzer reported at that time was used extensively during the next 2 years upon small sample systems for testing its performance. View full abstract»

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  • The single-core magnetic amplifier as a computer element

    Publication Year: 1953 , Page(s): 442 - 446
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    THE magnetic amplifier and magnetic devices in general have garnered an enviable reputation for reliability and maintenance-free operation1 in their not-so-short history.2 For these reasons these devices have been a subject of considerable interest3, 4 to the computer field wherein electron tube failure is a major headache. There have been many magnetic devices developed for use in this field, but for the most part they either have been slow (requiring several cycles of excitation frequency for build-up of output) or have not exhibited any considerable power gain. Speed of response is quite important for this determines computing speed. Power gain is quite important, for in a given computer these devices must be cascaded so that one device operates others as well as associated registering or indicating devices. View full abstract»

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  • Communication and electronics index for 1952

    Publication Year: 1953 , Page(s): 447 - 450
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    Freely Available from IEEE

Aims & Scope

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

Full Aims & Scope