GB238550A - Improvements in thermionic amplifying apparatus - Google Patents
Improvements in thermionic amplifying apparatusInfo
- Publication number
- GB238550A GB238550A GB20266/25A GB2026625A GB238550A GB 238550 A GB238550 A GB 238550A GB 20266/25 A GB20266/25 A GB 20266/25A GB 2026625 A GB2026625 A GB 2026625A GB 238550 A GB238550 A GB 238550A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- circuit
- low frequency
- plate
- frequency oscillations
- 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
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/46—Reflex amplifiers
- H03F3/48—Reflex amplifiers with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
238,550. British Thomson-Houston Co., Ltd., (Assignees of Hull, A. W.). Aug. 15, 1924, [Convention date]. Thermionic amplifiers.-A thermionic valve 1 having a cathode 2, plate 3 and grids 4. 5. is arranged to produce a negative resistance in the cathode-plate circuit and so that high frequency oscillations are impressed on the grid 4 together with low frequency oscillations .so that the valvo 1 serves as a dual amplifier. The plate circuit 7. 8 is preferably tuned by simultaneously variable inductance and capacity and a detecting device directly or indirectly associated there with and with the grid circuit so as to impress the low frequency oscillations on the grid 4. The Figure shows the detector 9 coupled by a condenser 18 to the plate circuit 7, 8 and by a resistance 19 to the input of the valve 1. The crystal detector 9 is polarized and the grid 4 is preferably biased by potentiometer tapping 20 through a choke 23. Filters 24, 25 may be provided to exclude high frequency currents which are by-passed from the low frequency circuit by a condenser 17.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US238550XA | 1924-08-15 | 1924-08-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB238550A true GB238550A (en) | 1925-12-03 |
Family
ID=21817592
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20266/25A Expired GB238550A (en) | 1924-08-15 | 1925-08-12 | Improvements in thermionic amplifying apparatus |
| GB24129/25A Expired GB240488A (en) | 1924-08-15 | 1925-09-28 | Improvements in thermionic amplifying systems |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24129/25A Expired GB240488A (en) | 1924-08-15 | 1925-09-28 | Improvements in thermionic amplifying systems |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1547152A (en) |
| FR (1) | FR602607A (en) |
| GB (2) | GB238550A (en) |
-
1924
- 1924-09-27 US US740394A patent/US1547152A/en not_active Expired - Lifetime
-
1925
- 1925-08-12 GB GB20266/25A patent/GB238550A/en not_active Expired
- 1925-08-14 FR FR602607D patent/FR602607A/en not_active Expired
- 1925-09-28 GB GB24129/25A patent/GB240488A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB240488A (en) | 1926-01-21 |
| FR602607A (en) | 1926-03-23 |
| US1547152A (en) | 1925-07-21 |
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