GB450616A - Improvements in thermionic amplifiers - Google Patents
Improvements in thermionic amplifiersInfo
- Publication number
- GB450616A GB450616A GB1718835A GB1718835A GB450616A GB 450616 A GB450616 A GB 450616A GB 1718835 A GB1718835 A GB 1718835A GB 1718835 A GB1718835 A GB 1718835A GB 450616 A GB450616 A GB 450616A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- valve
- tappings
- bias
- potentiometer
- 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
- H03F3/26—Push-pull amplifiers; Phase-splitters therefor
- H03F3/28—Push-pull amplifiers; Phase-splitters therefor with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
450,616. Valve amplifying circuits. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and MACFADYEN, K. A., c/o General Electric Co.. Ltd., Wembley, Middlesex. June 14, 1935, Nos. 17188 and 31148. [Class 40 (v)] In quiescent push-pull amplifiers (using a pair of approximately similar valves) in order to obtain maximum output with minimum distortion, the means provided for varying the grid bias applied to each valve are interconnected with means for varying the relation between the signal voltage and the input voltages to each valve. In this way, the grid bias adjustment individual to each valve and necessary to ensure that with no signal the prescribed anode current is the same for each valve is accompanied by a simultaneous input voltage adjustment so that the negative grid bias may be substantially equal to the amplitude of the greatest input voltage applied to the grid. In the arrangement shown, input voltage potentiometers 8 are connected across separate secondaries 7 and adjustable input tappings 12 are connected with the respective grids. Tappings 9 on the grid-bias potentiometer 10 are connected to the inner ends of the potentiomotors 8. The controls of the two tappings 9, 12 associated with each valve are mechanically interconnected. If the potentiometers are of the same length. the ganging provides that the distance of a tapping from the positive end of 10 is equal to the distance of the corresponding tapping 12 from the inner end of the potentiomotor 8. In a modification, the secondaries 7 are two halves of a divided transformer and a single potentiometer, centre-tapped, is connected across its ends. The centre taps of potentiometer and transformer are interconnected by the source of grid-bias so that the single potentiometer serves as two, each with an adjustable tapping connected with its grid. This form may be used to supply a number of parallel pairs of valves, each additional pair requiring an extra pair of adjustable tappings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1718835A GB450616A (en) | 1935-06-14 | 1935-06-14 | Improvements in thermionic amplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1718835A GB450616A (en) | 1935-06-14 | 1935-06-14 | Improvements in thermionic amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB450616A true GB450616A (en) | 1936-07-22 |
Family
ID=10090794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1718835A Expired GB450616A (en) | 1935-06-14 | 1935-06-14 | Improvements in thermionic amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB450616A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1787388A2 (en) * | 2004-07-19 | 2007-05-23 | Peavey Electronics Corporation | Methods and apparatus for variable harmonic distortion |
-
1935
- 1935-06-14 GB GB1718835A patent/GB450616A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1787388A2 (en) * | 2004-07-19 | 2007-05-23 | Peavey Electronics Corporation | Methods and apparatus for variable harmonic distortion |
| EP1787388A4 (en) * | 2004-07-19 | 2010-12-15 | Peavey Electronics Corp | Methods and apparatus for variable harmonic distortion |
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