GB606004A - Improvements in push-pull amplifying circuits - Google Patents
Improvements in push-pull amplifying circuitsInfo
- Publication number
- GB606004A GB606004A GB6244/46A GB624446A GB606004A GB 606004 A GB606004 A GB 606004A GB 6244/46 A GB6244/46 A GB 6244/46A GB 624446 A GB624446 A GB 624446A GB 606004 A GB606004 A GB 606004A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- opposition
- bias
- supplied
- negative bias
- 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
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/22—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with tubes only
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/52—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using discharge tubes in series with the load as final control devices
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/08—Separation of synchronising signals from picture signals
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
Abstract
606,004. Valve - amplifying circuits. PHILIPS LAMPS, Ltd. Feb. 28, 1946, No. 6244. Convention date, July 4, 1941. [Class 40 (vi)] In a class B or class C push-pull amplifier circuit, a variable grid bias increasing with the input to the amplifier is obtained by rectifying the alternating current voltage appearing in the H.T. supply unit to decrease the distortion caused by the voltage drop due to the resistance of this unit. The Figure shows a low-frequency push-pull amplifier comprising valves 5 and 6, the anode voltage being supplied from transformer 9 and rectifying valve 10. A fixed negative bias for valves 5, 6, is derived from transformer 15 and rectifying valve 16. A variable grid bias in opposition to the fixed negative bias is supplied by means of transformer 18, the primary of which is connected between the two secondary windings of transformer 9, and the secondary winding is connected in series opposition with the secondary windings of transformer 15. The opposition voltage supplied by transformer 18 increases as the signal increases, thereby decreasing the negative bias voltage supplied from rectifier 16. Transformer 18 should have a low primary resistance and high transformation ratio, and phase-shifting networks 26, 27, are provided to ensure that the two voltages are exactly in phase opposition. The bias is applied via potentiometers 28 and 29, which should be of high resistance. To prevent overloading of valves 5 and 6, transformer 18 may be arranged to become saturated at the maximum admissible load so that the negative bias is not reduced beyond this point.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL606004X | 1941-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB606004A true GB606004A (en) | 1948-08-04 |
Family
ID=19787944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6244/46A Expired GB606004A (en) | 1941-07-04 | 1946-02-28 | Improvements in push-pull amplifying circuits |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2527406A (en) |
| DE (1) | DE860081C (en) |
| FR (1) | FR883747A (en) |
| GB (1) | GB606004A (en) |
| NL (1) | NL59009C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2772329A (en) * | 1951-02-23 | 1956-11-27 | Bendix Aviat Corp | Correction of distortion in push-pull amplifiers |
| US2896096A (en) * | 1953-03-17 | 1959-07-21 | Schwarzer Fritz | Power supply |
| US3064202A (en) * | 1959-01-27 | 1962-11-13 | Gen Electric | Low current drain transistor amplifier |
| US3274508A (en) * | 1963-10-14 | 1966-09-20 | Webster Electric Co Inc | Power amplifier including biasing means for reducing standby power dissipation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1904272A (en) * | 1928-03-07 | 1933-04-18 | Bell Telephone Labor Inc | Vacuum tube amplifier circuit |
| US1985946A (en) * | 1929-01-25 | 1935-01-01 | Rca Corp | Amplifying and reproducing system |
| US2102779A (en) * | 1934-02-28 | 1937-12-21 | Rca Corp | Thermionic amplifier |
| US2154200A (en) * | 1934-11-12 | 1939-04-11 | Rca Corp | Voltage regulator device |
| US2132830A (en) * | 1934-11-20 | 1938-10-11 | Dictaphone Corp | Audio frequency amplifier |
-
0
- NL NL59009D patent/NL59009C/xx active
-
1942
- 1942-07-02 DE DEN2487D patent/DE860081C/en not_active Expired
- 1942-07-02 FR FR883747D patent/FR883747A/en not_active Expired
-
1946
- 1946-02-28 GB GB6244/46A patent/GB606004A/en not_active Expired
- 1946-05-09 US US668424A patent/US2527406A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR883747A (en) | 1943-07-13 |
| US2527406A (en) | 1950-10-24 |
| NL59009C (en) | |
| DE860081C (en) | 1952-12-18 |
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