GB150037A - Improvements in wireless telegraph and telephone transmission - Google Patents

Improvements in wireless telegraph and telephone transmission

Info

Publication number
GB150037A
GB150037A GB1282119A GB1282119A GB150037A GB 150037 A GB150037 A GB 150037A GB 1282119 A GB1282119 A GB 1282119A GB 1282119 A GB1282119 A GB 1282119A GB 150037 A GB150037 A GB 150037A
Authority
GB
United Kingdom
Prior art keywords
circuit
valve
grid
tuned
circuits
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1282119A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB1282119A priority Critical patent/GB150037A/en
Publication of GB150037A publication Critical patent/GB150037A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/04—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

150,037. Round, H. J. May 21, 1919. Frequency, changing; phase, changing. - In order to reduce energy losses due to internal heating, valve generators or amplifiers, commutators &c. are supplied with a square-form voltage, the energy of harmonics of the fundamental frequency being absorbed by tuned circuits. In the arrangement shown in Fig. 3, high-frequency current of sine form, Fig. 4, from a circuit G is supplied to the grid of an amplifier V, the grid and filament being shunted by a low resistance Fleming valve v, so that the voltage on the grid of valve V has the form shown in Fig. 5, the current in the plate circuit having the form shown in Fig. 6. A circuit F of fundamental frequency is connected to the aerial, while circuits F<3>, F<5>, tuned to harmonics, are arranged as shown. Instead of the independent generating circuit G, a reactive connexion between the circuit F and coil O may be provided as shown in dotted lines. Alternatively, the circuits F<3>, F<5> may be in parallel with circuit F, or they may be replaced by a resistance P, Fig. 7, and rejector circuit R tuned to the fundamental frequency, and arranged in parallel with the circuit F. A commutator may be used in place of a valve.
GB1282119A 1919-05-21 1919-05-21 Improvements in wireless telegraph and telephone transmission Expired GB150037A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1282119A GB150037A (en) 1919-05-21 1919-05-21 Improvements in wireless telegraph and telephone transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1282119A GB150037A (en) 1919-05-21 1919-05-21 Improvements in wireless telegraph and telephone transmission

Publications (1)

Publication Number Publication Date
GB150037A true GB150037A (en) 1920-08-23

Family

ID=10011744

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1282119A Expired GB150037A (en) 1919-05-21 1919-05-21 Improvements in wireless telegraph and telephone transmission

Country Status (1)

Country Link
GB (1) GB150037A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0909017A1 (en) * 1997-10-09 1999-04-14 Eev Limited Oscillator arrangements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0909017A1 (en) * 1997-10-09 1999-04-14 Eev Limited Oscillator arrangements

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