GB487628A - Improvements in electrical circuits for frequency changing - Google Patents
Improvements in electrical circuits for frequency changingInfo
- Publication number
- GB487628A GB487628A GB1270737A GB1270737A GB487628A GB 487628 A GB487628 A GB 487628A GB 1270737 A GB1270737 A GB 1270737A GB 1270737 A GB1270737 A GB 1270737A GB 487628 A GB487628 A GB 487628A
- Authority
- GB
- United Kingdom
- Prior art keywords
- positive
- control grid
- electrodes
- control
- cathode
- 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
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
- H03D7/10—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between different pairs of electrodes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- X-Ray Techniques (AREA)
Abstract
487,628. Valves and valve circuits. GENERAL ELECTRIC CO., Ltd., and ALDOUS, W. H. May 4, 1937, No. 12707. [Classes 39 (i) and 40 (v)] In a frequency-changing valve having two control grids 3, 6 to which the frequencies to be combined are applied, the second control grid 6 controls electrons from a secondary-emitting electrode 4 of high emissivity, arranged between the two control grids. The first control grid 3 has a bias not greatly positive and preferably slightly negative to the cathode, the secondaryemitting electrode 4 is substantially positive to the cathode, the second control grid 6 is also at a substantially positive potential not very different from and preferably slightly negative to the secondary-emitting electrode 4, and there may be two screening electrodes 5, 7 positive relatively to electrodes 4, 6. In a combined heptodetriode as shown, the second control grid 6 may be connected to the anode of the triode. There may be a series of secondary-emitting electrodes each positive to the preceding one as in an electron-multiplier.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1270737A GB487628A (en) | 1937-05-04 | 1937-05-04 | Improvements in electrical circuits for frequency changing |
| FR837541D FR837541A (en) | 1937-05-04 | 1938-05-04 | Improvements to frequency change assemblies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1270737A GB487628A (en) | 1937-05-04 | 1937-05-04 | Improvements in electrical circuits for frequency changing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB487628A true GB487628A (en) | 1938-06-23 |
Family
ID=10009632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1270737A Expired GB487628A (en) | 1937-05-04 | 1937-05-04 | Improvements in electrical circuits for frequency changing |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR837541A (en) |
| GB (1) | GB487628A (en) |
-
1937
- 1937-05-04 GB GB1270737A patent/GB487628A/en not_active Expired
-
1938
- 1938-05-04 FR FR837541D patent/FR837541A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR837541A (en) | 1939-02-13 |
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