GB516872A - Improvements in amplification control in thermionic amplifiers - Google Patents
Improvements in amplification control in thermionic amplifiersInfo
- Publication number
- GB516872A GB516872A GB2004338A GB2004338A GB516872A GB 516872 A GB516872 A GB 516872A GB 2004338 A GB2004338 A GB 2004338A GB 2004338 A GB2004338 A GB 2004338A GB 516872 A GB516872 A GB 516872A
- Authority
- GB
- United Kingdom
- Prior art keywords
- variable resistance
- condenser
- resistance
- shunted
- volume control
- 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
- 230000003321 amplification Effects 0.000 title abstract 2
- 238000003199 nucleic acid amplification method Methods 0.000 title abstract 2
- 238000004804 winding Methods 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/02—Manually-operated control
- H03G3/04—Manually-operated control in untuned amplifiers
- H03G3/06—Manually-operated control in untuned amplifiers having discharge tubes
- H03G3/08—Manually-operated control in untuned amplifiers having discharge tubes incorporating negative feedback
Landscapes
- Amplifiers (AREA)
Abstract
516,872. Valve amplifying circuits. SNEATH. O. B. July 6, 1938, No. 20043. [Class 40 (v)] A manual volume control consists of a potentiometer constituting a variable resistance in series with the signal input to a valve and to which negative reaction is applied and a variable resistance shunting the whole or a part of a winding of an audiofrequency transformer. The Figure shows an arrangement in which the feedback is fed through a condenser C1 and resistance R1 to the potentiometer R2, part of which varies the voltage fed back to the grid circuit, while the other part forms a variable resistance shunting a part of the input transformer winding. The range of the volume control can be further extended by including some positive reaction in the grid circuit. Frequency selective circuits may be used to vary the relative amplification of different frequencies, e.g., the variable resistance may be shunted by a condenser or a resistance shunted condenser may be included in the cathode circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2004338A GB516872A (en) | 1938-07-06 | 1938-07-06 | Improvements in amplification control in thermionic amplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2004338A GB516872A (en) | 1938-07-06 | 1938-07-06 | Improvements in amplification control in thermionic amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB516872A true GB516872A (en) | 1940-01-15 |
Family
ID=10139403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2004338A Expired GB516872A (en) | 1938-07-06 | 1938-07-06 | Improvements in amplification control in thermionic amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB516872A (en) |
-
1938
- 1938-07-06 GB GB2004338A patent/GB516872A/en not_active Expired
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