GB388292A - Improvements in or relating to thermionic amplifying arrangements - Google Patents
Improvements in or relating to thermionic amplifying arrangementsInfo
- Publication number
- GB388292A GB388292A GB20320/32A GB2032032A GB388292A GB 388292 A GB388292 A GB 388292A GB 20320/32 A GB20320/32 A GB 20320/32A GB 2032032 A GB2032032 A GB 2032032A GB 388292 A GB388292 A GB 388292A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bias
- rectifier
- grid
- battery
- amplifier
- 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
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/02—Volume compression or expansion in amplifiers having discharge tubes
-
- 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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/04—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Microwave Tubes (AREA)
- Hybrid Cells (AREA)
Abstract
388,292. Valve amplifying circuits. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. July 18, 1932, No. 20320. Convention date, April 26. [Class 40 (v).] The grid bias of a valve amplifier varies with the signal volume, the bias becoming so much more negative as the volume diminishes that the sum of the bias and the signal voltage is practically constant. In this way the consumption of plate current is reduced and the efficiency increased. In Fig. 1, an electrolytic or other rectifier 3 is connected across the input coil 2 in series with two condensers 4, 5, and resistances 6, 7 are connected as shown. Permanent bias is supplied by a battery 8 whilst the rectified signal gives an opposing bias to the grid of the amplifier 1. In Fig. 2, the output of the amplifier 1 is divided by a condenser potentiometer 20, 21 and part is applied to a grid-leak rectifier 12. Rising signal strength gives increased positive voltage.on the plate of this rectifier, part of which is transferred to the. grid of the valve 1 through a potentiometer 14, 15, 16. Permanent bias is supplied by a battery 17, and alternating voltages are smoothed out by condensers 18, 19. In a third form, Fig. 3 (not shown), the battery 17 is replaced by a diode rectifier connected to a mains supply and the grid-leak rectifier 12 is replaced by a second diode rectifier, bothrectifiers being contained in a single envelope with a common cathode.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL61083A NL40011C (en) | 1932-04-30 | 1932-04-30 | |
DEN35376D DE656476C (en) | 1932-04-30 | 1933-06-21 | Amplifier system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB388292A true GB388292A (en) | 1933-02-23 |
Family
ID=34066211
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20320/32A Expired GB388292A (en) | 1932-04-30 | 1932-07-18 | Improvements in or relating to thermionic amplifying arrangements |
GB16280/34A Expired GB417440A (en) | 1932-04-30 | 1934-05-31 | Improvements in or relating to thermionic amplifiers |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16280/34A Expired GB417440A (en) | 1932-04-30 | 1934-05-31 | Improvements in or relating to thermionic amplifiers |
Country Status (8)
Country | Link |
---|---|
US (2) | US2120995A (en) |
AT (1) | AT144736B (en) |
CH (2) | CH169190A (en) |
DE (2) | DE654641C (en) |
DK (1) | DK50062C (en) |
FR (2) | FR753235A (en) |
GB (2) | GB388292A (en) |
NL (2) | NL40011C (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2563773A (en) * | 1946-07-30 | 1951-08-07 | Sonotone Corp | Audio-frequency amplifier |
US2466018A (en) * | 1946-08-02 | 1949-04-05 | Sperry Corp | Vibratory strand reference apparatus with longitudinal component drive |
US2552586A (en) * | 1947-02-19 | 1951-05-15 | Thomas A Read | Automatic volume control |
BE560458A (en) * | 1954-02-08 | |||
NL267845A (en) * | 1959-04-27 | 1900-01-01 |
-
1932
- 1932-04-30 NL NL61083A patent/NL40011C/xx active
- 1932-07-18 GB GB20320/32A patent/GB388292A/en not_active Expired
-
1933
- 1933-01-23 US US652996A patent/US2120995A/en not_active Expired - Lifetime
- 1933-02-22 DE DEN34923D patent/DE654641C/en not_active Expired
- 1933-03-27 CH CH169190D patent/CH169190A/en unknown
- 1933-03-28 FR FR753235D patent/FR753235A/en not_active Expired
- 1933-06-21 DE DEN35376D patent/DE656476C/en not_active Expired
-
1934
- 1934-04-03 US US718784A patent/US2083626A/en not_active Expired - Lifetime
- 1934-05-09 DK DK50062D patent/DK50062C/en active
- 1934-05-31 CH CH175922D patent/CH175922A/en unknown
- 1934-05-31 GB GB16280/34A patent/GB417440A/en not_active Expired
- 1934-06-01 FR FR44893D patent/FR44893E/en not_active Expired
- 1934-06-01 AT AT144736D patent/AT144736B/en active
- 1934-06-14 NL NL69774A patent/NL43096C/xx active
Also Published As
Publication number | Publication date |
---|---|
CH169190A (en) | 1934-05-15 |
CH175922A (en) | 1935-03-15 |
DE656476C (en) | 1938-02-07 |
US2083626A (en) | 1937-06-15 |
AT144736B (en) | 1936-02-25 |
DK50062C (en) | 1935-03-25 |
DE654641C (en) | 1937-12-28 |
NL43096C (en) | 1938-05-16 |
FR44893E (en) | 1935-04-24 |
NL40011C (en) | 1937-02-15 |
FR753235A (en) | 1933-10-10 |
GB417440A (en) | 1934-10-04 |
US2120995A (en) | 1938-06-21 |
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