GB672256A - Improved electronic valve amplifiers - Google Patents
Improved electronic valve amplifiersInfo
- Publication number
- GB672256A GB672256A GB1541549A GB1541549A GB672256A GB 672256 A GB672256 A GB 672256A GB 1541549 A GB1541549 A GB 1541549A GB 1541549 A GB1541549 A GB 1541549A GB 672256 A GB672256 A GB 672256A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stage
- valve
- anode
- anodes
- push
- 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
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/34—DC amplifiers in which all stages are DC-coupled
- H03F3/36—DC amplifiers in which all stages are DC-coupled with tubes only
-
- 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
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
-
- 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
672,256. Valve amplifying circuits. COMMUNICATIONS PATENTS, Ltd. June 8, 1950 [June 9, 1949], No. 15415/49. Class 40 (vi). In a push-pull amplifier two or more stages which are similarly phased in respect of in-phase voltage variations are connected in series across the H.T. supply, so that negative feed-back occurs in respect of in-phase signals: As applied to a three-stage amplifier the first stage, comprising a double-triode 4 provided with anode load resistances 13, 14, is connected in series with the third stage which also comprises a double triode, 6. Unbalanced signals are applied via terminals 10 to one grid of the valve 4, the other grid being earthed and a balanced output being obtained by means of a common cathode resistance 12. The anodes of the valve 4 are directly connected to the grids of the second stage, which comprises a further doubletriode 5 with a common cathode resistance 19 and anode loads 20, 21. The final stage 6 is also provided with a common cathode resistance 15 and the grids are directly connected to the anodes of the valve 5; anode load resistances 16, 17 are provided, a push-pull output being obtained at the terminals 18. Additional negative feed-back may be obtained by connection of one or other anode of the stage 6 to the corresponding grid of the stage 4, via resistances 25, 27 and D.C. blocking condensers 26, 28. The arrangement is balanced by means of an adjustable potentiometer 11 connected between the cathodes of the valve 4; the state of balance is indicated by a centre-zero meter 22 which may be connected between the anodes of the valve 6. In a modification, Fig. 2 (not shown), the first stage of the amplifier comprises a pair of pentodes and balance is adjusted by means of a potentiometer connected between the screens of the valves, and whose slider is connected to a further potentiometer across the H.T. supply whereby the total current may be adjusted. In this embodiment the output stage works into a push-pull transformer arranged in its cathode circuit and requires an anode current exceeding that of the preceding valves in the series chain, the excess current being by-passed over a resistance which is connected to a tap on the H.T. supply.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1541549A GB672256A (en) | 1949-06-09 | 1949-06-09 | Improved electronic valve amplifiers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1541549A GB672256A (en) | 1949-06-09 | 1949-06-09 | Improved electronic valve amplifiers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB672256A true GB672256A (en) | 1952-05-21 |
Family
ID=10058733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1541549A Expired GB672256A (en) | 1949-06-09 | 1949-06-09 | Improved electronic valve amplifiers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB672256A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1150119B (en) * | 1959-05-19 | 1963-06-12 | Bernhard Philberth | Multi-stage tube or transistor amplifier with at least three stages, containing stages through which the operating current flows essentially one after the other |
US3210683A (en) * | 1961-01-13 | 1965-10-05 | Marconi Co Ltd | Variable gain circuit arrangements |
WO2004064249A2 (en) * | 2003-01-08 | 2004-07-29 | Bretza, Ltd. | Cathode-coupled pentode valve amplifier with servo offset controlled push-pull output stage |
-
1949
- 1949-06-09 GB GB1541549A patent/GB672256A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1150119B (en) * | 1959-05-19 | 1963-06-12 | Bernhard Philberth | Multi-stage tube or transistor amplifier with at least three stages, containing stages through which the operating current flows essentially one after the other |
US3210683A (en) * | 1961-01-13 | 1965-10-05 | Marconi Co Ltd | Variable gain circuit arrangements |
WO2004064249A2 (en) * | 2003-01-08 | 2004-07-29 | Bretza, Ltd. | Cathode-coupled pentode valve amplifier with servo offset controlled push-pull output stage |
WO2004064249A3 (en) * | 2003-01-08 | 2004-12-29 | Bretza Ltd | Cathode-coupled pentode valve amplifier with servo offset controlled push-pull output stage |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB579685A (en) | Improvements in or relating to thermionic amplifiers | |
GB536089A (en) | Improvements in or relating to thermionic valve amplifiers | |
GB915404A (en) | Improvements in or relating to variable gain circuit arrangements | |
GB688273A (en) | Improvements in or relating to vacuum tube amplifiers | |
GB533626A (en) | Electron discharge device amplifying circuits | |
GB672256A (en) | Improved electronic valve amplifiers | |
GB515158A (en) | Improvements in and relating to thermionic valve amplifiers | |
GB559078A (en) | Improvements in or relating to thermionic valve amplifying circuits | |
GB725238A (en) | Automatic electronic error correction circuit | |
GB702325A (en) | Improvements in or relating to electrical control circuits | |
GB542035A (en) | Improvements in or relating to methods of terminating electrical transmission lines and circuits therefor | |
GB683319A (en) | Improvements in or relating to thermionic valve amplifiers | |
GB865125A (en) | Improvements in or relating to direct current amplifiers | |
GB618259A (en) | Improvements in or relating to thermionic amplifiers | |
GB717055A (en) | Improvements in or relating to electronic valve circuits | |
GB516697A (en) | Improvements in or relating to wave amplifying systems | |
GB490656A (en) | Improvements in broad band amplifiers | |
GB721055A (en) | Improvements in electronic direct-current amplifiers | |
GB697064A (en) | Balanced low-frequency amplifiers | |
GB811167A (en) | Amplifier for direct currents or for very low frequency currents | |
GB472256A (en) | Improvements in and relating to thermionic amplifiers | |
GB797082A (en) | Current feedback circuit for push-pull amplifiers | |
GB708105A (en) | Improvements in or relating to thermionic valve amplifiers | |
GB678061A (en) | Improvements in or relating to thermionic valve amplifier arrangements | |
GB671102A (en) | Improvements in or relating to thermionic valve amplifiers |