GB251374A - Improvements in or relating to electrical circuits for wireless telegraphy, telephony or the like - Google Patents
Improvements in or relating to electrical circuits for wireless telegraphy, telephony or the likeInfo
- Publication number
- GB251374A GB251374A GB389125A GB389125A GB251374A GB 251374 A GB251374 A GB 251374A GB 389125 A GB389125 A GB 389125A GB 389125 A GB389125 A GB 389125A GB 251374 A GB251374 A GB 251374A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- resistance
- plate
- rectifier
- coupling
- 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)
Abstract
251,374. Cleghorn, C. A. Feb. 11, 1925. Thermionic amplifiers and detectors. - Comprises a receiving system employing resistance coupling, in which two or more valves arranged in series function as dual amplifiers. In the arrangement shown the valves V1, V2 are used as dual amplifiers and V3 as a rectifier. The grid of the second valve V2 is connected to the plate of the first valve V1 through a condenser C1 of suitable valve for low as well as high frequencies, a grid leak r being provided. The coupling resistance R may be 80,000 or 100,000 ohms, and the lead l may be connected to the plate, as shown, or to a point in the resistance R separated from the plate by a resistance varying from 1500 to 2500 ohms. The valve V2 is coupled to the rectifier V3 through a transformer P<1>, S' and the plate circuit of the rectifier includes the primary P2 of a low-frequency transformer whereby the audio-frequency output from the valve V3 is fed back into the aerial circuit. The coupling resistance R may be of the carbon type but is preferably of wire wound non-inductively in several sections having opposed directions of winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB389125A GB251374A (en) | 1925-02-11 | 1925-02-11 | Improvements in or relating to electrical circuits for wireless telegraphy, telephony or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB389125A GB251374A (en) | 1925-02-11 | 1925-02-11 | Improvements in or relating to electrical circuits for wireless telegraphy, telephony or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB251374A true GB251374A (en) | 1926-05-06 |
Family
ID=9766802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB389125A Expired GB251374A (en) | 1925-02-11 | 1925-02-11 | Improvements in or relating to electrical circuits for wireless telegraphy, telephony or the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB251374A (en) |
-
1925
- 1925-02-11 GB GB389125A patent/GB251374A/en not_active Expired
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