GB557005A - Improvements in or relating to amplifier circuits for ultra high frequencies - Google Patents

Improvements in or relating to amplifier circuits for ultra high frequencies

Info

Publication number
GB557005A
GB557005A GB714041A GB714041A GB557005A GB 557005 A GB557005 A GB 557005A GB 714041 A GB714041 A GB 714041A GB 714041 A GB714041 A GB 714041A GB 557005 A GB557005 A GB 557005A
Authority
GB
United Kingdom
Prior art keywords
electrode
electrodes
distance
anode
transit time
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
GB714041A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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
Priority to FR872802D priority Critical patent/FR872802A/fr
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Priority to GB714041A priority patent/GB557005A/en
Priority to US480194A priority patent/US2434295A/en
Publication of GB557005A publication Critical patent/GB557005A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/02—Tubes in which one or a few electrodes are secondary-electron emitting electrodes
    • H01J43/025—Circuits therefor
    • 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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/54—Amplifiers using transit-time effect in tubes or semiconductor devices

Abstract

557,005. Thermionic valves and circuits; electron oscillators and multipliers. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). June 5, 1941, No. 7140. [Classes 39 (i) and 40 (v)] In ultra high-frequency amplifiers wherein the electron transit time is greater than the oscillation period to be amplified the ends of the output impedance are connected to two electrodes located in the path of the electrons and at a distance apart so that the transit time of the electrons between these electrodes is less than half a period of the oscillations to be amplified ; in a pentode where the mesh of the suppressor grid is wide the electrodes considered are the anode and screen grid and in one construction for use with wave lengths below 1 m. the distance between these is less than 3 mm. and the suppressor is shaped as a window. With a distance of 0.8 mm. the minimum wavelength would be 6 cm. For tubes using secondary emission a screen grid 11 is placed between the control grid 10 and the secondary emission electrode 12 ;the output impedance 16 is connected in push-pull to the anode 8 and secondary electrode 12 the centre of the impedance being earthed. A screen 17 earthed for high frequencies is placed between the anode and secondary electrode 12 the distances being such that the electron transit time between the screen and either of these electrodes is less than half a period of the oscillations to be amplified. In a modification where the distance between the anode and secondary electrode is great two screens are used one at the requisite distance from each electrode. With more than one secondary emitting electrode a screen grid is used with each one that serves as output; to earth the screens a Lecher wire system is used, those screens and emitting electrodes not serving as output being connected to voltage nodes. Electric or magnetic focusing is used to maintain uniform transit time. Means to reduce the input and output damping are used. Specifications 495,839 and 499,218 are referred to.
GB714041A 1940-05-30 1941-06-05 Improvements in or relating to amplifier circuits for ultra high frequencies Expired GB557005A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR872802D FR872802A (en) 1940-05-30
GB714041A GB557005A (en) 1941-06-05 1941-06-05 Improvements in or relating to amplifier circuits for ultra high frequencies
US480194A US2434295A (en) 1940-05-30 1943-03-23 Amplifying circuit arrangement for ultra high frequencies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB714041A GB557005A (en) 1941-06-05 1941-06-05 Improvements in or relating to amplifier circuits for ultra high frequencies

Publications (1)

Publication Number Publication Date
GB557005A true GB557005A (en) 1943-11-01

Family

ID=9827373

Family Applications (1)

Application Number Title Priority Date Filing Date
GB714041A Expired GB557005A (en) 1940-05-30 1941-06-05 Improvements in or relating to amplifier circuits for ultra high frequencies

Country Status (1)

Country Link
GB (1) GB557005A (en)

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