GB516745A - Improvements in thermionic amplifiers - Google Patents
Improvements in thermionic amplifiersInfo
- Publication number
- GB516745A GB516745A GB2004238A GB2004238A GB516745A GB 516745 A GB516745 A GB 516745A GB 2004238 A GB2004238 A GB 2004238A GB 2004238 A GB2004238 A GB 2004238A GB 516745 A GB516745 A GB 516745A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- cathode
- circuit
- load
- volume
- 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
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/04—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
516,745. Valve amplifying circuits. SNEATH, O. B. July 6, 1938, No. 20042. [Class 40 (v)] In an audio-frequency amplifier, a rectifier in the grid circuit is arranged to reduce, as the signal becomes weaker, the biasing-voltage, and so economize in anode current. In Fig. 4, the cathode load, which may be a resistance or the normal output load, is connected across A, B. The grid is negatively biased by the cathode load so that only a small anode current flows, but when a signal is applied the rectifier N produces a voltage which reduces the bias to a normal working value. In modifications, Figs. 1 and 2 (not shown), the output load may be connected in the anode circuit, or in series with a variable resistance in the cathode circuit. A voltage from the cathode load may provide either negative feed-back, or by rectification an automatic-volume-control voltage. An automatic volume control voltage may be obtained as shown in Fig. 4 at Y from the potential divider R8, H9 and the smoothing circuit C3, R10, C4, the voltage of the H.T. negative with respect to cathode and earth varying with the volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2004238A GB516745A (en) | 1938-07-06 | 1938-07-06 | Improvements in thermionic amplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2004238A GB516745A (en) | 1938-07-06 | 1938-07-06 | Improvements in thermionic amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB516745A true GB516745A (en) | 1940-01-10 |
Family
ID=10139384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2004238A Expired GB516745A (en) | 1938-07-06 | 1938-07-06 | Improvements in thermionic amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB516745A (en) |
-
1938
- 1938-07-06 GB GB2004238A patent/GB516745A/en not_active Expired
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