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Proceedings of the IRE

Issue 9 • Date Sept. 1962

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Displaying Results 1 - 23 of 23
  • Poles and Zeros

    Publication Year: 1962 , Page(s): 1889
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  • G. A. Woonton, Director, 1962-1964

    Publication Year: 1962 , Page(s): 1890
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  • Scanning the issue

    Publication Year: 1962 , Page(s): 1891
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  • Letter Accompanying Ballot for IEEE Directors

    Publication Year: 1962 , Page(s): 1892
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  • Ballot

    Publication Year: 1962 , Page(s): 1893
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  • Future Organization of the Board of Directors of the Continuing Corporation

    Publication Year: 1962 , Page(s): 1894 - 1895
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  • Biographies of nominees

    Publication Year: 1962 , Page(s): 1896 - 1897
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  • Quantum Effects in Communications Systems

    Publication Year: 1962 , Page(s): 1898 - 1908
    Cited by:  Papers (50)
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    The information capacity of various communications systems is considered. Quantum effects are taken fully into account. The entropy of an electromagnetic wave having the quantum statistical properties of white noise in a single transmission mode is found, and from it the information efficiency of various possible systems may be derived. The receiving systems considered include amplifiers, heterodyne and homodyne converters and quantum counters. In the limit of high signal or noise power (compared to h¿B, where h is Planck's constant and ¿ and B are, respectively, the center frequency and bandwidth of the channel) the information efficiency of an amplifier can approach unity. In the limit of low powers the amplifier becomes inefficient, while the efficiency of the quantum counter can approach unity. The amount of information that can be incorporated in a wave drops off rather rapidly when the power drops below h¿B. View full abstract»

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  • Negative Impedance Electrometer Amplifiers - Introduction

    Publication Year: 1962 , Page(s): 1909 - 1911
    Cited by:  Papers (2)
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  • Cathode Follower and Negative Capacitance as High Input Impedance Circuits

    Publication Year: 1962 , Page(s): 1912 - 1927
    Cited by:  Papers (10)  |  Patents (2)
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    Action potentials recorded across membranes may have a maximum rate of rise of up to 103 v/sec and the impedance of the electrode plus the generator is of the order of 10 M¿. Therefore, to reduce distortion of the recorded signal, it is necessary to diminish the effective capacitance of the input circuit to about 1 ¿¿f. It is also requisite to reduce the currents which pass through the biological specimen, both the input grid current (< 10-13 A) and the current charging the input capacitance (< 10-9 A). The performance of a cathode follower and a negative capacitance as to reduction of input capacitance was measured by the damping factor a and the time constant T¿ of the second-order transfer function. An equivalent input time constant Teq = aT¿ of 10 ¿sec ensures small distortion and negligible current through the cell. Whether a cathode follower or a negative capacitance is the more suitable depends on the value of that part of the input-ground capacitance Cg, which cannot be removed by screening. When Cg is large (microelectrode deeply immersed in the specimen) a negative capacitance is advantageous; with a small value of Cg (electrode immersed < 1 mm) the cathode follower may neutralize to a Teq = 30 ¿sec as does a negative capacitance with a cutoff frequency of 200 kc. View full abstract»

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  • Stabilized Wide-Band Potentiometric Preamplifiers

    Publication Year: 1962 , Page(s): 1928 - 1941
    Cited by:  Papers (8)
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    The need for a wide-band preamplifier to measure bioelectric potentials from a source with high internal resistance and shunt capacitance has stimulated the development of instruments which should be generally useful. Consideration is given to the simultaneous attainment of such factors as low grid current, linearity, low drift, and improved dynamic response by compensation for input capacitance. An analysis of a simplified circuit is augmented by the use of an analog computer to simulate the system for a preamplifier having either a first- or second-order response. Some examples of circuits suitable for bioelectric measurements are described. It has been possible to chopper-stabilize such preamplifiers against drift without significant degradation of their high input impedance characteristics. View full abstract»

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  • Bandwidth Limits for Neutralized Input Capacity Amplifiers

    Publication Year: 1962 , Page(s): 1942 - 1950
    Cited by:  Papers (3)
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    Criteria for bandwidth limits for neutralized input capacity amplifiers are developed. The behavior of different neutralization schemes is analyzed in terms of the root locus of the system gain function. This technique permits quantitative design and evaluation of the different circuits that have been used. It makes it possible to judge the effectiveness of new approaches to the problem. It is shown that second-order amplifiers may achieve inherently faster response than amplifiers with a single time constant. Using a critically damped criterion, the maximum bandwidth of the second-order amplifier is equal to the cube root of the product of the input circuit bandwidth times the square of the amplifier bandwidth with the input circuit removed. A single time constant amplifier has a maximum bandwidth equal to the square root of the product of the input circuit bandwidth times that of the amplifier alone. It is shown also that one may have to choose between speed of response and excess noise. The noise figure of these systems may increase markedly with bandwidth and increases to a lesser degree with the system complexity. View full abstract»

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  • On the Reception of Quasi-Monochromatic, Partially Polarized Radio Waves

    Publication Year: 1962 , Page(s): 1950 - 1957
    Cited by:  Papers (21)
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    The response of an elliptically polarized antenna to a quasi-monochromatic, partially polarized radio wave is treated from the standpoint of coherence theory. A general formula is derived for the available power at the terminals of a receiving antenna in terms of appropriately chosen coherency matrices for the antenna and the incident wave. It is shown that the result is formally identical with the basic interference law of partially coherent, quasi-monochromatic wave fields. Conditions for the maximum available power are discussed, and a geometrical interpretation of the result is given. The coherency matrix for the antenna is determined uniquely in terms of the transmitting properties of the antenna. It is shown that the coherency matrix formalism for the interaction of an antenna with an incident wave fits very well with those used in the modern theory of optics and quantum mechanics. A new definition for the antenna effective aperture using the coherency matrix is suggested, which takes into account the polarization property of the antenna. View full abstract»

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  • Coherent FDM/FM Telephone Communication

    Publication Year: 1962 , Page(s): 1957 - 1966
    Cited by:  Papers (2)
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    This paper analyzes telephone communication as applied to a satellite repeater system. Particular emphasis is placed on a method of coherent reception which is important to our emerging communication satellite systems. This reception technique is not new to the field of space communications and telemetry; however, it is new to the field of common carrier telephony. As a consequence, for the class of signals utilized in common carrier telephony, an attempt is made to place on a quantitative footing the design of FDM/FM satellite communication systems. The interrelation among such quantities as sensitivity, bandwidth occupancy, and channel quality is presented for a simply realized second-order receiving system. In addition, the maximum sensitivity achievable with the optimum receiving system is shown. It is anticipated that these two situations will bound the performance of the majority of systems. View full abstract»

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  • A Piezoelectric-Piezomagnetic Gyrator

    Publication Year: 1962 , Page(s): 1967 - 1973
    Cited by:  Papers (5)
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    A linear passive unilateral element, which has a high forward/backward transmission ratio at all frequencies, is realized by combining two resistances and an electromechanical gyrator according to Gamo's theory. The gyrator consists of three mechanically coupled ceramic elements, two of which may be piezomagnetic and the third piezoelectric, or two of which may be piezoelectric and the third piezomagnetic. In either arrangement, a unilateral coupling between mechanical and electrical systems is provided by using one piezoelectric and one piezomagnetic element. The third element is merely for driving the mechanical system. Such a design makes manufacturing considerably easier. Characteristics of the gyrator have been discussed based on an equivalent circuit. A constant input resistance can be obtained at a terminal pair of the isolator by purely electrical means even after the fabrication of the gyrator. This simplifies the matching at this terminal. The theoretical minimum insertion loss is 3 db under the matched termination conditions. A few models have been made at 150 kc using both the sandwiched and the cascaded structures. A highly achromatic suppression of backward transmission (45 db) has been obtained in agreement with theoretical predictions. Minimum forward insertion loss consists of the theoretical minimum of 3 db and an excess loss of a few db due principally to mechanical losses. View full abstract»

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  • Correction

    Publication Year: 1962 , Page(s): 1973
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  • How to Obtain the IRE Standards on Electron Tubes: Methods of Testing, 1962

    Publication Year: 1962 , Page(s): 1974 - 1975
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  • Correspondence

    Publication Year: 1962 , Page(s): 1976 - 2000
    Cited by:  Papers (2)
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  • Contributors

    Publication Year: 1962 , Page(s): 2001 - 2002
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  • Books

    Publication Year: 1962 , Page(s): 2003 - 2004
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  • Scanning the Transactions

    Publication Year: 1962 , Page(s): 2005 - 2006
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  • Abstracts of IRE Transactions

    Publication Year: 1962 , Page(s): 2007 - 2018
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    The issues of IRE Transactions listed herein have recently been published, and are now available from the Institute of Radio Engineers, Inc. The contents of each issue and, where available, abstracts of technical papers are given. View full abstract»

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  • Abstracts and references

    Publication Year: 1962 , Page(s): 2019 - 2032
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    Compiled by the Radio Research Organization of the Department of Scientific and Industrial Research, London, England, and Published by Arrangement with that Department and Electronic Technology, Dorset House, Stamford St., London S.E. 1, England. The Index to the Abstracts and References published in the PROC. IRE from February, 1961 through January, 1962 is published by the PROC. IRE, June, 1962, Part II. It is also published by Electronic Technology and appears in the March, 1962, issue of that Journal. Included with the Index is a selected list of journals scanned for abstracting with publishers' addresses. View full abstract»

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Aims & Scope

This Periodical ceased production in 1962. The current retitled publication is Proceedings of the IEEE.

Full Aims & Scope