GB526418A - Improvements in or relating to modulator arrangements - Google Patents
Improvements in or relating to modulator arrangementsInfo
- Publication number
- GB526418A GB526418A GB518839A GB518839A GB526418A GB 526418 A GB526418 A GB 526418A GB 518839 A GB518839 A GB 518839A GB 518839 A GB518839 A GB 518839A GB 526418 A GB526418 A GB 526418A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- valve
- modulator
- choke
- grid
- 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
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- 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
- H03F1/06—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
526,418. Valve modulating and amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and CLOUGH, N. H. Feb. 16, 1939, No. 5188. [Class 40 (v)] A modulator or amplifier comprises a main modulator valve Vm in series with a highfrequency driven amplifier R or a loud speaker or other audio-frequency load, and a sub-modulator Vs having its anode connected through a resistance Rb to the cathode of the valve Vm. Modulation input is applied at T 1 , T 2 and the varying voltage drop across Rb is applied to the grid of the valve Vm. The resistance Rb may be replaced by a resistance, shunted by condenser, in series with a choke, the resistance giving the necessary steady bias. In this modification the choke may be constituted as an auto transformer, or as a doubly wound transformer so as to apply larger variations to the grid of the valves Vm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB518839A GB526418A (en) | 1939-02-16 | 1939-02-16 | Improvements in or relating to modulator arrangements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB518839A GB526418A (en) | 1939-02-16 | 1939-02-16 | Improvements in or relating to modulator arrangements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB526418A true GB526418A (en) | 1940-09-18 |
Family
ID=9791356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB518839A Expired GB526418A (en) | 1939-02-16 | 1939-02-16 | Improvements in or relating to modulator arrangements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB526418A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8075763B2 (en) | 2005-12-23 | 2011-12-13 | Innospec Limited | Process for treating aged crude oil residue |
-
1939
- 1939-02-16 GB GB518839A patent/GB526418A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8075763B2 (en) | 2005-12-23 | 2011-12-13 | Innospec Limited | Process for treating aged crude oil residue |
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