Proceedings of the Institute of Radio Engineers

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  • Simple Inductance Formulas for Radio Coils

    Publication Year: 1928, Page(s):1398 - 1400
    Cited by:  Papers (114)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (728 KB)

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  • A New High Efficiency Power Amplifier for Modulated Waves

    Publication Year: 1936, Page(s):1163 - 1182
    Cited by:  Papers (447)  |  Patents (50)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2320 KB)

    This paper introduces a new form of linear power amplifier for modulated radio-frequency waves. Plate circuit efficiencies of sixty to sixty-five per cent independent of modulation are obtained by means of the combined action of varying load distribution among the tubes and varying circuit impedance over the modulation cycle. The theory of operation is developed and detailed observations on the be... View full abstract»

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  • High Power Outphasing Modulation

    Publication Year: 1935, Page(s):1370 - 1392
    Cited by:  Papers (271)  |  Patents (102)
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  • Recent Investigations on the Propagation of Electromagnetic Waves

    Publication Year: 1925, Page(s):5 - 27
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2312 KB)

    Since the summer of 1922, quantitative measurements have been carried out on the signal strengths of the American high power stations WQK and WSO, using an objective measuring method. The object of these measurements is to study the propagation of electromagnetic waves. It has been shown that these phenomena can be studied only by continued measurements. Curves are presented showing the field stre... View full abstract»

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  • Amplitude, Phase, and Frequency Modulation

    Publication Year: 1931, Page(s):2145 - 2176
    Cited by:  Papers (29)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2640 KB)

    This paper presents a comparative theoretical study of amplitude, phase, and frequency modulation. In the first part, the fundamental mathematical expressions for the three types of modulation are derived. They are expressed in three different forms: as amplitude equations, side band equations and modulation vector equations. The amplitude equations indicate the envelope of the radio-frequency dir... View full abstract»

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  • The Propagation of Radio Waves over the Surface of the Earth and in the Upper Atmosphere

    Publication Year: 1936, Page(s):1367 - 1387
    Cited by:  Papers (169)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (4296 KB)

    Simple formulas and graphs are given which represent the ground-wave field intensity at the surface of the earth as radiated from a short vertical antenna at the surface of the earth. The theory is compared to some experimental results reported by other investigators to determine its range of application. The diffraction formula given is theoretically valid only at the lower frequencies; however, ... View full abstract»

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  • The Propagation of Radio Waves over the Surface of the Earth and in the Upper Atmosphere

    Publication Year: 1937, Page(s):1203 - 1236
    Cited by:  Papers (181)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (3960 KB)

    Completely general formulas are given for computing at any point above a plane earth of finite conductivity the vector electric field for a source which may be a combination of vertical and horizontal electric dipoles or a loop antenna with its axis parallel or perpendicular to the earth. As illustrations of the above general methods, formulas are derived for the ground-wave radiation from (1) a g... View full abstract»

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  • Frequency Modulation Noise Characteristics

    Publication Year: 1937, Page(s):472 - 514
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (5776 KB)

    Theory and experimental data are given which show the improvements in signal-noise ratio effected by frequency modulation over amplitude modulation. It is shown that above a certain carrier-noise ratio in the frequency modulation receiver which is called the "improvement threshold," the frequency modulation signal-noise ratio is greater than the amplitude modulation signal-noise ratio by a factor ... View full abstract»

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  • A New Principle in Directional Antenna Design

    Publication Year: 1938, Page(s):333 - 345
    Cited by:  Papers (100)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1408 KB)

    It is shown that in certain types of directional antenna arrays the gain can be increased by arranging so that waves going from the array elements in the direction of maximum transmission are not strictly in phase at large distances. Three examples are given, an end-fire array and two antennas designed to radiate, as far as possible, only in a horizontal plane. In the case of the end-fire array it... View full abstract»

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  • Skin-Effect Resistance Measurements of Conductors, at Radio-Frequencies up to 100,000 Cycles per Second

    Publication Year: 1916, Page(s):523 - 574
    Cited by:  Papers (16)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (5744 KB)

    After defining the skin-effect resistance and reactance ratios, the "spirality" and "proximity effects" for conductors at radio-frequencies, a differential bridge circuit supplied with current from 10,000 to 100,000 cycles by an Alexanderson alternator is described. There are tested at various frequencies straight solid wires, stranded wires (of various spiralities, and also braided), wires with d... View full abstract»

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  • The Nonlinear Theory of Electric Oscillations

    Publication Year: 1934, Page(s):1051 - 1086
    Cited by:  Papers (247)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2811 KB)

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  • Tables for the Calculation of the Mutual Inductance of Any Two Coaxial Single-Layer Coils

    Publication Year: 1933, Page(s):1039 - 1049
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (976 KB)

    Absolute formulas for the calculation of the mutual inductance of coaxial solenoids, although they are required for work of the great precision necessary in absolute measurements, are not convenient for routine calculations. Series formulas, although simpler, are limited in the range of their convergence, thus requiring the choice of the proper formula for any given problem. The tables and formula... View full abstract»

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  • Circuit Relations in Radiating Systems and Applications to Antenna Problems

    Publication Year: 1932, Page(s):1004 - 1041
    Cited by:  Papers (145)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2744 KB)

    Expressions for the self and mutual impedances within a radiating system are developed by the use of the generalized reciprocity theorem. These expressions are given in terms of the distributions of the electric field intensities along the radiators. A method for the determination of the field intensities is outlined. Formulas for the self and mutual impedances in several types of directional ante... View full abstract»

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  • The Design of Transformers for Audio-Frequency Amplifiers with Preassigned Characteristics

    Publication Year: 1928, Page(s):1742 - 1770
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (4632 KB)

    The requirements of an ideal transformer are stated, and the difficulties encountered in attempting to build transformers for interstage coupling units which will meet these requirements are pointed out. The aim in design for audio amplifiers is stated to be a reasonable voltage amplification for one tube and one transformer which is independent of the frequency over a range necessary for broadcas... View full abstract»

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  • Beam Transmission of Ultra Short Waves

    Publication Year: 1928, Page(s):715 - 740
    Cited by:  Papers (134)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (4496 KB)

    Part I of this paper is devoted to a description of various experiments performed at wavelengths below 200 cm. Curves are given to show the effect of the earth and various types of inductively excited antennas called "wave directors." Part I is concluded with a discussion of beam and horizontally polarized radiation. Part II is devoted chiefly to the magnetron tubes used for the production of very... View full abstract»

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  • The Piezo-Electric Resonator and Its Equivalent Network

    Publication Year: 1928, Page(s):742 - 764
    Cited by:  Papers (45)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2472 KB)

    The theory of the piezo-electric and the mechanical behavior of a quartz resonator is stated following Voight and Cady. The functions of the quartz as dielectric and as vibrator are shown to be separable and replaceable by a condenser in parallel with an electrical resonator, i.e., a series chain of inductance, resistance, and capacity. For a Curie-cut quartz rod excited lengthwise through the tra... View full abstract»

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  • Some Engineering and Economic Aspects of Radio Broadcast Coverage

    Publication Year: 1936, Page(s):190 - 206
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2512 KB)

    The results of a quantitative study of the major factors affecting radio broadcast coverage are given for a frequency range from 200 to 2000 kilocycles and for transmission conditions covering the range normally experienced in the United States The effects of terrain, frequency, and antenna design in limiting the maximum nighttime service range of broadcast stations are discussed and it is shown t... View full abstract»

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  • The Interdependence of Frequency Variation and Harmonic Content, and the Problem of Constant-Frequency Oscillators

    Publication Year: 1933, Page(s):958 - 981
    Cited by:  Papers (55)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1568 KB)

    The investigations of the frequency variations in oscillating systems with negative nonlinear resistance were based until now on the fundamental differential equation of the simple oscillatory circuit. This method, although very exact, is not always sufficiently simple and even not always possible, especially if it concerns more complicated schemes. The symbolic calculus, although very simple in u... View full abstract»

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  • A Theory of Noise for Electron Multipliers

    Publication Year: 1938, Page(s):321 - 332
    Cited by:  Papers (80)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1336 KB)

    The noise in secondary-emission electron multipliers is considered from a theoretical viewpoint. The noise properties of a stage are correlated with its secondary-emission properties: the mean value m and mean-square deviation δ2of the number of secondaries per primary. If IpA2 and IsAf2 denote the mean-square noise current lying in the frequency band Δf in the primary- and se... View full abstract»

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  • A Multiple Unit Steerable Antenna for Short-Wave Reception

    Publication Year: 1937, Page(s):841 - 917
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (11712 KB)

    This paper discusses a receiving system employing sharp vertical-plane directivity, capable of being steered to meet the varying angles at which short radio waves arrive at a receiving location. The system is the culmination of some four years effort to determine the degree to which receiving antenna directivity may be carried to increase the reliability of short-wave transatlantic telephone circu... View full abstract»

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  • Calculation and Design of Class C Amplifiers

    Publication Year: 1936, Page(s):620 - 632
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1448 KB)

    A method of calculating the performance of class C triode amplifiers is presented which is based on the assumption that the total space current (Ip+Ig) is proportional to (Eg+Ep/μ)α, where α is a constant, usually close to three halves. The direct-current and fundamental alternating-current components of such a space current pul... View full abstract»

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  • An Electromechanical Representation of a Piezoelectric Crystal Used as a Transducer

    Publication Year: 1935, Page(s):1252 - 1263
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1048 KB)

    An electromechanical representation of a piezoelectric crystal which can represent the crystal when it is used to drive an external mechanical system is given in this paper. The elements of the system are evaluated in terms of the electrical, piezoelectric, and mechanical constants of the crystal. When the crystal is used as a purely electrical element, the representation reduces to the usual form... View full abstract»

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  • A Magnetic Amplifier for Radio Telephony

    Publication Year: 1916, Page(s):101 - 120
    Cited by:  Papers (15)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (3880 KB)

    A magnetic amplifying device is described for permitting the control of radio frequency currents by varying the saturation of the iron core of an inductance included in the radio frequency circuit. The arrangement of windings of the amplifier is such that the controlling winding has no radio frequency E. M. F. induced in it, nor does it induce currents in the radio frequency coils. Various arrange... View full abstract»

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  • Radio Transmission Measurements

    Publication Year: 1923, Page(s):115 - 152
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (9064 KB)

    The paper divides naturally into three sections. The first section briefly analyses the radio transmission circuit into (a) the sending or radiating portion, (b) the transmitting portion consisting of the ether path thru which the radiated waves travel, and (c) the receiving portion. The relation of these from the standpoint of the radio transmission engineer is discussed, pointing out the need of... View full abstract»

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  • The Calculation of the Inductance of Single-Layer Coils and Spirals Wound with Wire of Large Cross Section

    Publication Year: 1929, Page(s):2053 - 2063
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1216 KB)

    Formulas are given for both wires of round cross section and wires of rectangular cross section. These are obtained by an extension of the Rosa Method. Tables are given from which the geometric mean distances of rectangles which enter in the formulas may be readily obtained. View full abstract»

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  • Alternating-Current Resistance of Rectangular Conductors

    Publication Year: 1937, Page(s):434 - 447
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (4080 KB)

    New experimental data are presented for conductors having ratios of width to thickness of 1 to 1 to 2400 to 1 for frequencies up to eight kilocycles. These data are co-ordinated with existing data furnishing an experimental proof of the "principle of similitude." "Skin effect" formulas are also checked with the experimental data over the range of frequencies for which these relations apply. View full abstract»

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  • The Piezo-Electric Resonator

    Publication Year: 1922, Page(s):83 - 114
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (3856 KB)

    The general theory of piezo-electricity is summarized, and the equations applicable to quartz are stated. The "concentrated mass theory" of longitudinal vibrations in rods is then developed, and the properties of the "resonance circle" discussed. On this theoretical basis the equations for the reaction of a piezo-electric resonator upon a circuit are derived, and solved by a graphical method. From... View full abstract»

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  • Electromagnetic Waves in Hollow Metal Tubes of Rectangular Cross Section

    Publication Year: 1938, Page(s):1520 - 1555
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (3752 KB)

    The theory of the transmission of electromagnetic waves in hollow conducting pipes of rectangular cross section is derived for perfectly conducting and for imperfectly conducting materials. Special attention is given to the type of wave that has only one transverse and everywhere parallel component of electric intensity, and the results of experiments on this wave are reported. Expressions for the... View full abstract»

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  • Distributed Capacity of Single-Layer Coils

    Publication Year: 1934, Page(s):897 - 905
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1105 KB)

    The results of previous work done on the distributed capacity of single-layer coils are briefly outlined. Previous theory and experiment do not agree. The reasons for this disagreement are discussed. Two important parameters were omitted from previous theory. The theoretical part of the present paper yields a formula which includes these two additional parameters. This formula is substantiated by ... View full abstract»

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  • The Use of Rochelle Salt Crystals for Electrical Reproducers and Microphones

    Publication Year: 1931, Page(s):2020 - 2029
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1424 KB)

    The paper begins with a brief historical résumé of the development of piezo activity for acoustic uses. References are given. Methods developed by the author and his associates permit the cheap commercial production of Rochelle salt crystals and sections thereof, but the saturation and variation with temperature of Rochelle salt (shown in diagrams) must be compensated for by special asse... View full abstract»

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  • Measurement of the electromagnetic field of waves received during trans-oceanic radio transmission

    Publication Year: 1920, Page(s):286 - 296
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (937 KB)

    A series of recent experiments is described on the determination of the electric and magnetic field intensities of the waves received at Leghorn, Italy, from the Annapolis, Maryland transmitting station. A pair of large loops, respectively practically parallel and perpendicular to the incoming wave are used. The incoming signals are received by hetero-dyne oscillator and amplified. The substitutio... View full abstract»

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  • A Quantitative Study of the Dynatron

    Publication Year: 1935, Page(s):1536 - 1566
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2904 KB)

    This paper describes two methods of predicting the performance of a dynatron oscillator. The use of the Massachusetts Institute of Technology differential analyzer is the first method described. This machine has been used to determine the amplitude of oscillation and harmonic content of a type '24 tube dynatron oscillator for various conditions. A corresponding experimental study is presented in t... View full abstract»

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  • Aircraft Radio Equipment for Use on European Air Lines

    Publication Year: 1935, Page(s):979 - 984
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1696 KB)

    The apparatus to be described has been developed to provide a transmitting and receiving equipment for small and medium commercial and private aircraft which will be extremely simple to operate and as foolproof as possible. Many features are introduced which, although they have been in use for broadcast and other commercial radio apparatus, have not been applied to aircraft radio equipments. For e... View full abstract»

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  • Transmission of Electromagnetic Waves in Hollow Tubes of Metal

    Publication Year: 1936, Page(s):1298 - 1328
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2656 KB)

    Electromagnetic energy may be transmitted through the inside of hollow tubes of metal, provided the frequency is greater than a certain critical value; this value is inversely proportional to the tube radius and to the dielectric coefficient for the tube interior. Calculations and measurements of the more important characteristics of this new kind of transmission system have been made, and the con... View full abstract»

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  • Design of Audio-Frequency Amplifier Circuits Using Transformers

    Publication Year: 1936, Page(s):219 - 232
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1304 KB)

    The computation of performance of a transformer at frequencies near resonance is simplified for the case in which the secondary is loaded with resistance. The information is presented in the form of a family of curves in which the generator and load resistances are the dependent and independent variables. The parameter, or third variable, held constant for a given curve, is the ratio of gain at re... View full abstract»

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  • Audio Frequency Transformers

    Publication Year: 1927, Page(s):679 - 686
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (752 KB)

    In the foregoing paper a method for calculating the amplification curve of an audio frequency transformer is developed in terms of the usual constants of the transformer and of the tube. The distributed capacity of the coils and the mutual capacity between the primary and secondary coils are represented by lumped capacities. The exciting current of the transformer is neglected. As the equation for... View full abstract»

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  • Notes on the Theory of Modulation

    Publication Year: 1922, Page(s):57 - 64
    Cited by:  Papers (112)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (856 KB)

    The transmission system of "frequency modulation" (transmission by variation of the frequency of the radiated wave) is mathematically analyzed, and the width of the band of frequencies occupied by this method of transmission at a given speed is compared with the width of the corresponding band for transmission by amplitude variation. It is proved that the frequency modulation system using a spacin... View full abstract»

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  • Directional Antennas

    Publication Year: 1937, Page(s):78 - 145
    Cited by:  Papers (44)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (6024 KB)

    The object of this paper is to develop analytical methods which are readily applicable to the general problems that arise in array design and to provide design curves that may be used without reference to the field theory underlying the problem. The cases of both driven and parasitic arrays have been treated. Where possible, the results have been tested by comparison with experimental results. The... View full abstract»

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  • Minimum Noise Levels Obtained on Short-Wave Radio Receiving Systems

    Publication Year: 1937, Page(s):1517 - 1530
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1952 KB)

    The theoretical minimum noise level of receivers in the absence of any interference, the source of which is external to the receiver, is discussed and compared with the limit actually measured on various antennas over a limited frequency range in the short-wave spectrum. It is pointed out that, on the shorter wave lengths and in the absence of man-made interference, the usable signal strength is g... View full abstract»

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  • Oscillating Audion Circuits

    Publication Year: 1918, Page(s):63 - 97
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (3000 KB)

    A general method is presented for investigating theoretically the conditions of oscillation in circuits supplied by an audion. This method is based on the relay action of the audion, as represented by its characteristic curve, and has for its fundamental idea the use of the slope of this curve as a physical constant of the audion, called the "mutual conductance." Two modes of applying this method ... View full abstract»

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  • The Physical Reality of Space and Surface Waves in the Radiation Field of Radio Antennas

    Publication Year: 1937, Page(s):1192 - 1202
    Cited by:  Papers (50)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1296 KB)

    Evidence is presented which indicates that, notwithstanding the change in sign made by Sommerfeld in his 1926 paper on radio wave propagation, the radiation field of a vertical electric dipole may be separated into space and surface wave components. Sommerfeld's original concepts as to the characteristics of two such waves in radio transmission are largely substantiated. It is shown that a space a... View full abstract»

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  • Experimental Determination of the Fundamental Dynamic Characteristics of a Triode

    Publication Year: 1924, Page(s):609 - 622
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1352 KB)

    By picking out the fundamental component only from the distorted current in a triode while functioning, the writer has found first new forms of dynamic characteristics for a triode, which are utilizable for solving various problems not hitherto satisfactorily solved (for example, modulation in radio telephony, the phenomenon of "Ziehen," or "pulling," and so on), and secondly that the grid current... View full abstract»

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  • Some Recent Developments of Regenerative Circuits

    Publication Year: 1922, Page(s):244 - 260
    Cited by:  Papers (94)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (3384 KB)

    A system of circuits is described whereby the effective resistance of a regenerative circuit is periodically made positive and negative, tho predominantly positive. Such a circuit will respond to impressed electromotive forces by setting up free oscillations during the negative resistance period, which oscillations are proportional to the exciting emf. The forced oscillations produced by the excit... View full abstract»

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  • The Avalon-Los Angeles Radio Toll Circuit

    Publication Year: 1921, Page(s):469 - 505
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (10936 KB)

    The communication facilities of Santa Catalina Island are described with special reference to the radio telephone service to the Californian mainland and the mode of connection to the wire telephone networks at the ends of the radio telephone channel. The radio telephone link is full duplex, and is connected thru special two-way repeaters to the telephone system at each end. A simultaneous duplex ... View full abstract»

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  • Theory of Electron Gun

    Publication Year: 1934, Page(s):1386 - 1411
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2549 KB)

    The function of the electron gun irrespective of the purpose for which the cathode ray tube is used is to generate, to concentrate, to control, and to focus an electron beam to a spot of a desired size. This paper describes the theory of the above-mentioned functions. The point of view of electron optics is presented and the theory of thick electron lenses with variable indexes of refraction is gi... View full abstract»

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  • Reciprocal Theorems in Radio Communication

    Publication Year: 1929, Page(s):952 - 956
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (560 KB)

    Two reciprocal theorems, the generalized Rayleigh theorem and the Sommerfeld-Pfrang theorem are of great theoretical importance in radiocommunication. A careful analysis of these theorems and their mathematical derivations shows that they are quite distinct and their practical fields of application different. In particular it shows that the Sommerfeld-Pfrang theorem labors under restrictions, impl... View full abstract»

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  • A Theoretical Comparison of Coupled Amplifiers with Staggered Circuits

    Publication Year: 1932, Page(s):1203 - 1220
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1360 KB)

    Detuned or staggered single tuned circuits are compared theoretically with the so-called band-pass or coupled circuits. The networks in each case are compared with each other by expressing the ratio of the input to output voltage in terms of the amplifications, A0of a single tuned stage. It is shown that approximately the same results are obtained up to optimum coupling by either method... View full abstract»

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  • A Study of Class B and C Amplifier Tank Circuits

    Publication Year: 1932, Page(s):813 - 834
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2008 KB)

    An investigation was made of the relations between the constants L, C, and R of a power amplifier output tank circuit. Experimental data were taken on an amplifier excited at a frequency of 480 cycles per second. An indication of the harmonic content of the output was obtained by means of a cathode ray oscillograph. The results of the experimental data show that the output power and voltage and th... View full abstract»

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  • Calculation of Output and Distortion in Symmetrical Output Systems

    Publication Year: 1932, Page(s):1763 - 1773
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (4016 KB)

    The conventional formula for power output is accurate when even harmonics only are present but it does not give the true power output if odd harmonics are present. It is shown that the correction factor to be applied is the square of one plus or minus the ratio of the third harmonic amplitude to that of the fundamental. Output systems are discussed in which the even harmonics are inherently low, s... View full abstract»

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  • A Fourier Analysis of Radio-Frequency Power Amplifier Wave Forms

    Publication Year: 1932, Page(s):1640 - 1659
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1840 KB)

    A theoretical treatment of class B and C radio-frequency amplifier wave forms by means of the Fourier series is presented. Assuming constant plate tuned circuit impedance, general expressions for the Fourier coefficients for any value of grid bias from cut-off to the position for class A operation are derived. The variation in plate circuit efficiency as the bias is moved from the position for cla... View full abstract»

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Aims & Scope

This Periodical ceased production in 1938. The current retitled publication is Proceedings of the IEEE.

Full Aims & Scope