GB538381A - Improvements in or relating to thermionic valve apparatus - Google Patents

Improvements in or relating to thermionic valve apparatus

Info

Publication number
GB538381A
GB538381A GB1853/40A GB185340A GB538381A GB 538381 A GB538381 A GB 538381A GB 1853/40 A GB1853/40 A GB 1853/40A GB 185340 A GB185340 A GB 185340A GB 538381 A GB538381 A GB 538381A
Authority
GB
United Kingdom
Prior art keywords
grid
feedback
control
auxiliary
resistance
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
GB1853/40A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 BE442181D priority Critical patent/BE442181A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1853/40A priority patent/GB538381A/en
Priority to FR869421D priority patent/FR869421A/en
Priority to US375594A priority patent/US2294782A/en
Publication of GB538381A publication Critical patent/GB538381A/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
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Cold Cathode And The Manufacture (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

538,381. Thermionic valves and circuits therefor. STANDARD TELEPHONES & CABLES, Ltd., and JACOBSEN, B. B. Jan. 30, 1940, No. 1853. [Classes 39 (i) and 40 (v)] The effective mutual conductance of a valve having an accelerating grid is increased by positive feedback from a secondary emitting electrode, having a resistance in circuit therewith, to a point in the electron stream where the electron velocity is low. The secondary emitting electrode may itself be arranged at a point in the electron stream where the velocity is low. Fig. 1 shows feedback through condenser 15 from the secondary electron emitting grid 5 to an auxiliary grid 2. The accelerating electrode 4 is at a higher potential than the grid 5 and, in addition there may be provided a screening grid which assists in withdrawing secondary electrons and a suppressor grid. The control and auxiliary grids 2, 3 may be interchanged or intermeshed, and the secondary electron emitting grid 5 may itself serve as the auxiliary grid for providing reaction. Fig. 5 shows'an arrangement in which the secondary electron emitting grid 5 serves as the control grid and feedback is applied through the secondary of the input transformer 24 to the auxiliary grid 3. Fig. 7 shows an additional feedback through network 24 to increase the effective input capacity. Condenser 15 and grid 2 may be omitted so that the sole feedback is through the network 24. Negative feedback may be applied by resistance 19 which may be temperature dependant so as to further stabilize the operation. Control of grid bias through resistance 17 may be used for automatic volume control and gives a large range of control.
GB1853/40A 1940-01-30 1940-01-30 Improvements in or relating to thermionic valve apparatus Expired GB538381A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE442181D BE442181A (en) 1940-01-30
GB1853/40A GB538381A (en) 1940-01-30 1940-01-30 Improvements in or relating to thermionic valve apparatus
FR869421D FR869421A (en) 1940-01-30 1941-01-21 Thermionic or similar lamps
US375594A US2294782A (en) 1940-01-30 1941-01-23 Thermionic valve apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1853/40A GB538381A (en) 1940-01-30 1940-01-30 Improvements in or relating to thermionic valve apparatus

Publications (1)

Publication Number Publication Date
GB538381A true GB538381A (en) 1941-07-31

Family

ID=9729147

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1853/40A Expired GB538381A (en) 1940-01-30 1940-01-30 Improvements in or relating to thermionic valve apparatus

Country Status (4)

Country Link
US (1) US2294782A (en)
BE (1) BE442181A (en)
FR (1) FR869421A (en)
GB (1) GB538381A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577454A (en) * 1946-08-22 1951-12-04 Hartford Nat Bank & Trust Co Cavity-resonator tube and associated circuit
US2467840A (en) * 1946-12-20 1949-04-19 George E Mallinckrodt Direct-current transformer
GB683061A (en) * 1948-01-24 1952-11-19 Emi Ltd Improvements relating to thermionic valves utilising secondary electron emission amplification
US2617948A (en) * 1948-11-18 1952-11-11 Heinz E Kallmann Electron multiplying device
US2731562A (en) * 1949-10-07 1956-01-17 Japan Broadcasting Corp System of controlling electron current in multiple electrode tubes
US2949578A (en) * 1957-01-29 1960-08-16 Jan A Narud Millimicrosecond pulse circuits
US3048788A (en) * 1958-08-15 1962-08-07 Edgerton Germeshausen And Grie Sweep signal generating system
US6642657B2 (en) * 1994-12-01 2003-11-04 Frederick M. Mako Robust pierce gun having multiple transmitting and emitting section
CA2254132A1 (en) * 1996-05-22 1997-11-27 Frederick M. Mako Multi-stage electron gun having an electrostatic cavity

Also Published As

Publication number Publication date
FR869421A (en) 1942-02-02
BE442181A (en)
US2294782A (en) 1942-09-01

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