GB487953A - Improvements in electric amplifiers involving thermionic valves and the like - Google Patents
Improvements in electric amplifiers involving thermionic valves and the likeInfo
- Publication number
- GB487953A GB487953A GB94537A GB94537A GB487953A GB 487953 A GB487953 A GB 487953A GB 94537 A GB94537 A GB 94537A GB 94537 A GB94537 A GB 94537A GB 487953 A GB487953 A GB 487953A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- coupling
- stage
- impedance
- less
- 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
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/22—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
487,953. Valve amplifying circuits ; artificial lines. GENERAL ELECTRIC CO., Ltd., and MACFADYEN, K. A. Jan. 12, 1937, No. 945. [Classes 40 (iii) and 40 (v)] In an audio frequency amplifier the driven stage is coupled to a power stage which may pass grid current and may be a single or a push-pull stage by a 1 : 1 transformer having one end of the secondary coupled by a condenser to one end of the primary winding with the remaining ends connected directly or through a condenser. The coupling capacity C is so chosen relatively to the leakage inductance L, to which it is in parallel, that the impedance is less than the impedance connected across the transformer output terminals at all frequencies in the range amplified. The combination LC is preferably resonant at a frequency less or not much greater than the lowest frequency in the range and a resistance may be connected in series with the coupling condenser of value #L/2C. With two coupling condensers C1, C2 series resistances of values #L/4C1 and #L/4C2 may be employed. Specification 450,036 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB94537A GB487953A (en) | 1937-01-12 | 1937-01-12 | Improvements in electric amplifiers involving thermionic valves and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB94537A GB487953A (en) | 1937-01-12 | 1937-01-12 | Improvements in electric amplifiers involving thermionic valves and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB487953A true GB487953A (en) | 1938-06-29 |
Family
ID=9713281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB94537A Expired GB487953A (en) | 1937-01-12 | 1937-01-12 | Improvements in electric amplifiers involving thermionic valves and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB487953A (en) |
-
1937
- 1937-01-12 GB GB94537A patent/GB487953A/en not_active Expired
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