GB502310A - Improvements in or relating to circuit arrangements comprising electric discharge tubes - Google Patents
Improvements in or relating to circuit arrangements comprising electric discharge tubesInfo
- Publication number
- GB502310A GB502310A GB17414/38A GB1741438A GB502310A GB 502310 A GB502310 A GB 502310A GB 17414/38 A GB17414/38 A GB 17414/38A GB 1741438 A GB1741438 A GB 1741438A GB 502310 A GB502310 A GB 502310A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- grids
- triode
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
502,310. Thermionic valves; superheterodyne circuits for wireless reception. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. June 11, 1938, No. 17414. Convention date, June 14, 1937. [Classes 39 (i) and 40 (v)] A thermionic mixe: valve has at least three grids between cathode 1 and anode 8 and two adja cent grids 2, 3, Fig. 1 which act as control grids are provided with screens 6 which extend betweer the parts of the grids near the support rods and are connected to the cathode or to a point of fixed negative potential. By dispensing with the usual positive screening grid between the control grids, the valve noise is reduced. Preferably the turns of the second control grid 3 and the third screening grid 4 are aligned. A suppressor grid 5 is provided. In the circuit shown in Fig. 2 a separate triode 9 generates the local oscillations which are applied to the second control grid 3, the incoming signal from circuit 21 being applied to the inner grid 2. To compensate the presence of local oscillations on grid 2 induced electrostatically from grid 3, a reversed phase component taken from the anode circuit of triode 9 is applied through variable condenser 24 and resistance 25 to the grid 2. The triode may be incorporated in the valve 10 and may use the same cathode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE502310X | 1937-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB502310A true GB502310A (en) | 1939-03-15 |
Family
ID=6545877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17414/38A Expired GB502310A (en) | 1937-06-14 | 1938-06-11 | Improvements in or relating to circuit arrangements comprising electric discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB502310A (en) |
-
1938
- 1938-06-11 GB GB17414/38A patent/GB502310A/en not_active Expired
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