GB537300A - Arrangements for suppressing parallel oscillation in push-pull amplifiers and oscillators - Google Patents
Arrangements for suppressing parallel oscillation in push-pull amplifiers and oscillatorsInfo
- Publication number
- GB537300A GB537300A GB3230439A GB3230439A GB537300A GB 537300 A GB537300 A GB 537300A GB 3230439 A GB3230439 A GB 3230439A GB 3230439 A GB3230439 A GB 3230439A GB 537300 A GB537300 A GB 537300A
- Authority
- GB
- United Kingdom
- Prior art keywords
- push
- pull
- gain
- feed
- stage
- 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)
- Amplifiers (AREA)
Abstract
537,300. Valve circuits. STANDARD TELEPHONES & CABLES, Ltd., HILL, F. R., and SAMSON, G. G. Dec. 15, 1939, No. 32304. [Class 40 (v)] In a push-pull amplifier or oscillator, spurious oscillation in,the parallel anode is prevented by the provision of a negative feedback circuit which reduces the gain in the parallel anode but which has substantially no effect upon the gain on the push-pull anode. In the case of an oscillator the feed-back is in regenerative phase. The first push-pull stage of a Class B audiofrequency amplifier is shown in which negative feedback for reducing distortion in taken from the final stage (not shown) and applied to the grid circuit of the valves V, V1 of the first stage through a wide range transformer T, and input bridges B. Negative feed-back is also applied by means of an unbyepassed cathode resistance R which feed-back reduces the gain of the stage for parallel operation without affecting the gain for push-pull operation. The increase in grid bias is offset by applying a positive voltage to the grids of valves V, V1 by means of a potentiometer P across the plate supply. Alternatively the resistance R may be of a value to give the desired grid bias, and a choke in series with the resistance may be used for the negative feed-back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3230439A GB537300A (en) | 1939-12-15 | 1939-12-15 | Arrangements for suppressing parallel oscillation in push-pull amplifiers and oscillators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3230439A GB537300A (en) | 1939-12-15 | 1939-12-15 | Arrangements for suppressing parallel oscillation in push-pull amplifiers and oscillators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB537300A true GB537300A (en) | 1941-06-17 |
Family
ID=10336523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3230439A Expired GB537300A (en) | 1939-12-15 | 1939-12-15 | Arrangements for suppressing parallel oscillation in push-pull amplifiers and oscillators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB537300A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2714137A (en) * | 1944-10-12 | 1955-07-26 | George S Dzwons | Stabilized amplifier |
-
1939
- 1939-12-15 GB GB3230439A patent/GB537300A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2714137A (en) * | 1944-10-12 | 1955-07-26 | George S Dzwons | Stabilized amplifier |
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