GB538381A - Improvements in or relating to thermionic valve apparatus - Google Patents
Improvements in or relating to thermionic valve apparatusInfo
- 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
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)
- Electron Sources, Ion Sources (AREA)
- Cold Cathode And The Manufacture (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.
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)
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 |
-
0
- BE BE442181D patent/BE442181A/xx unknown
-
1940
- 1940-01-30 GB GB1853/40A patent/GB538381A/en not_active Expired
-
1941
- 1941-01-21 FR FR869421D patent/FR869421A/en not_active Expired
- 1941-01-23 US US375594A patent/US2294782A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
BE442181A (en) | |
US2294782A (en) | 1942-09-01 |
FR869421A (en) | 1942-02-02 |
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