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Electron Devices, IRE Transactions on

Issue 4 • Date Oct. 1955

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Displaying Results 1 - 10 of 10
  • [Front cover and table of contents]

    Publication Year: 1955 , Page(s): c1
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    Freely Available from IEEE
  • An analysis of focusing and deflection in the post–deflection–focus color kinescope

    Publication Year: 1955 , Page(s): 1 - 7
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (741 KB)  

    In the Post-Deflection-Focus Color Kinescope, there is an array of parallel wires next to the phosphor screen for the purpose of focusing the electron beam and for deflecting it up and down in order to change colors. Expressions are derived for the deflection sensitivity and focusing properties of such a system which are applicable for all points within the picture area. The theoretical results are compared with experimental measurements; good agreement is obtained. Contour maps showing the variation over the grid plane of deflection sensitivity and the voltage ratio for optimum focus are included. View full abstract»

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  • High-frequency silicon-aluminum alloy junction diodes

    Publication Year: 1955 , Page(s): 8 - 9
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    Silicon-aluminum alloy junction diodes have been made that have rectifying properties up to frequencies of 500 megacycles per second. Recovery times from storage effects are of the order of 0.1 microsecond. View full abstract»

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  • Small–signal analysis of floating–junction transistor switch circuits

    Publication Year: 1955 , Page(s): 10 - 13
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    In this paper some characteristics of switch circuits using junction transistors are analyzed. The switch properties result from the large changes in small-signal admittance of one junction of a transistor when the bias polarity of the other junction is reversed. The characteristics analyzed include the small-signal, low-frequency conductance and the associated potentials. The circuits are suitable for low level modulators and commutators. View full abstract»

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  • Periodic focusing of beams from partially shielded cathodes

    Publication Year: 1955 , Page(s): 13 - 19
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (541 KB)  

    Using both an analog computer and an approximate analytical method, the equation describing the beam shapes which result from a uniform pencil beam of electrons entering a periodic magnetic field has been studied. The investigation has been primarily directed toward beams emergent from ideal cathodes only partially shielded from the magnetic field. Cases of both small and large scalloping have been considered. Curves relating the magnetic field coefficient α and the space-charge coefficient β are presented. A previously proposed relationship between α and β for small scalloping is shown to be inaccurate for large scalloping. Stable solutions for the motion of an electron beam having no thermal velocities are obtained for values of α less than 0.66 and in addition they are also found for some values of α greater than 0.66. View full abstract»

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  • The electronic theory of tape–helix traveling–wave structures

    Publication Year: 1955 , Page(s): 19 - 25
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    An electronic theory of the operation of tape-helix traveling-wave structures is given. This includes the case of traveling-wave amplifiers and backward-wave oscillators operating on any space harmonic. The method of solution is based upon an integral equation for the longitudinal electric field which is solved approximately for the case of small beam currents. This method is equally applicable to thin beams, thick beams, and annular beams with or without a transverse variation of dc density or velocity. Explicit expressions are obtained for the impedance and space-charge parameter of each space harmonic. View full abstract»

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  • Nonlinear wave propagation in traveling–wave amplifiers

    Publication Year: 1955 , Page(s): 26 - 34
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (702 KB)  

    A method is given for computing the efficiency of traveling-wave amplifiers with high gain and low C, including the effects of space charge and attenuation. The ballistics of the electrons is governed by the Boltzmann transport equation which, together with the circuit equation, is solved in a power series expansion of the input voltage. Only the first two terms of this series are computed and various nonlinear results are given in the form of curves. It appears that for small C and small convergence parameters, overtaking affects the nonlinear operation slightly. View full abstract»

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  • Study of a plane short on a shielded helix

    Publication Year: 1955 , Page(s): 34 - 36
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (324 KB)  

    The results of probe measurements along a shielded helix terminated in a plane conducting "short" are given. These results seem to indicate that the higher-order fields at the short are reactive and that the minimums are shifted out from the normal 180-degree position. The amount of this shift seemed to be relatively constant at approximately 38 degrees from 500 to 2,000 megacycles for a particular helix. A very approximate analysis of the helix short is made where the helix and its image wire are considered as a tapered two-wire transmission line. The position of the first minimum is determined by a numerical integration using the transmission line equations. This analysis predicts the correct direction of the shift of the minimum and also gives a rough idea as to the amount of this shift over the given band of frequencies. View full abstract»

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  • A coupled mode description of the backward–wave oscillator and the Kompfner dip condition

    Publication Year: 1955 , Page(s): 37 - 42
    Cited by:  Papers (19)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (546 KB)  

    The start oscillation condition for the backward-wave oscillator and the operation of the traveling-wave tube amplifier at the Kompfner dip point are described from the point of view of the coupling of two modes of propagation. Growing waves are not involved. Two waves are sufficient when the tube is more than a half plasma wavelength long. Operation in this "large space charge" domain is inherently simpler than in the "low space charge" domain. The start oscillation condition and the Kompfner dip condition are simply expressed in terms of the coupling constant between modes, HL = (2n ± 1) π/2, where n is an integer. In addition, the uncoupled modes must have the same velocity. The result is also expressed in terms of the more familiar parameters CN and hL. The effect of loss in the circuit mode is calculated. When the two waves carry energy in opposite directions, growing waves result. This case is discussed briefly. View full abstract»

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  • [Back cover]

    Publication Year: 1955 , Page(s): c4
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    Freely Available from IEEE

Aims & Scope

This Transaction ceased production in 1962. The current retitled publication is IEEE Transactions on Electron Devices.

Full Aims & Scope