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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Chopper stabilization of a direct amplifier

Haville, George Douglas, 1926- January 1958 (has links)
No description available.
2

A screen-grid coupled direct-current amplifier

Jones, William Benjamin 08 1900 (has links)
No description available.
3

A study of vacuum tubes as low-powered amplifiers, designed for high efficiency

Graves, Varney A. 08 1900 (has links)
No description available.
4

High frequency performance of parallel-T networks

Powell, Donald Spencer 08 1900 (has links)
No description available.
5

The transductor amplifier its manner of action and comments on its use for automatic regulation.

Krabbe, Ulrik. Ytterberg, Arle. January 1900 (has links)
Thesis--Danmarks Tekniske Højskole. / Without thesis statement. Summary in Danish. Bibliography: p. 166-167.
6

The transductor amplifier its manner of action and comments on its use for automatic regulation.

Krabbe, Ulrik. Ytterberg, Arle. January 1900 (has links)
Thesis--Danmarks Tekniske Højskole. / Without thesis statement. Summary in Danish. Bibliography: p. 166-167.
7

A hybrid-coupled tunnel-diode amplifier

Holland, John Henry January 1962 (has links)
The analysis and design of a hybrid-coupled tunnel-diode amplifier is described, considering both the hybrid junction and the tunnel-diode circuitry. The fundamental theory of the tunnel diode is reviewed. The hybrid junction is in the form of a strip-line directional coupler which makes use of the inherent contra-directional coupling between two adjacent transmission lines. A complete analysis of the frequency dependence of the response of such a coupler is given. The amplifier is realized using the coupler and a pair of matched diodes terminating mutually isolated ports. To optimize the performance of this type of amplifier the design of the coupler is integrated with the design of the diode circuit. In doing so, account is taken of the frequency dependence of the hybrid junction, an aspect of the problem which has not been treated in the literature. As an example, an amplifier covering the VHF television channels is designed, and experimental results of a working model for a 50-ohm system are presented. The amplifier uses the periodicity of the directional coupler to provide two pass bands spanning Channels 2 to 6 (54 to 88 Mc) and Channels 7 to 12 (174 to 216 Mc), respectively. The two GE lN2939A tunnel diodes used for the amplifier provide a gain of 7.8 db ± 0.3 db for the lower band and 8.9 db ± 0.45 db for the upper band. The maximum input VSWR for the lower and upper bands are less than 2.3 and 3.2, respectively. The theoretical noise figure for a bias current of 0.7 ma is 3.79 db. It is found that the experimental results are in general agreement with the theory. Suggestions for improvement are given in cases where discrepancies do occur. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate
8

On the selection of tuning patterns in stagger-tuning multicavity klystron amplifiers

Yuan, John Tsong January 1960 (has links)
In the iterative method for producing maximally-flat response for the multicavity klystron amplifier, a choice must be made in allocating poles to cavities. In this thesis, a method is described for selecting the tuning pattern which will give flat response with maximum gain for a specific multicavity klystron. The iterative method for multicavity klystron amplifiers is extended, to tubes with up to six cavities. It is shown that the optimum tuning pattern has an appreciable advantage in gain over the alternative choices. The practice of allocating the highest-frequency pole to the penultimate cavity is justified, at least for relatively short tubes. Illustrative numerical tuning designs for four-, five- and six-cavity klystron amplifiers with different tuning patterns are given to verify the method. The restrictions of small-signal fundamental-mode theory apply throughout the thesis. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate
9

Iterative methods for stagger-tuning multiclavity klystron amplifiers.

Isaacs, Albert Thomas January 1958 (has links)
This thesis describes the theoretical adjustment of the tuning of multicavity klystron amplifiers for prescribed frequency response. The method used is an iterative process developed at Stanford University in 1952. The purpose of the investigation was to test the applicability of the iterative method to the design of microwave amplifiers. The rational function representation of klystron amplifier response is described and it is shown that for physical realizability the zeros of transmission must be dependent on the poles of transmission. An iterative numerical method is developed for simultaneously fulfilling the prescribed response conditions and the physical realizability condition. Illustrative numerical designs of four- and five cavity klystron amplifier tuning are given which verify the method. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate
10

On the theory of carrier amplifiers

Piercy, Joseph Edward January 1949 (has links)
The theory of the magnetic amplifier and other carrier amplifiers is put on a general mixer basis. The amplifiers are compared from this common basis and paths of further development indicated. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

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