GB445071A - Improvements in transmitters for radio beacons - Google Patents
Improvements in transmitters for radio beaconsInfo
- Publication number
- GB445071A GB445071A GB16595/35A GB1659535A GB445071A GB 445071 A GB445071 A GB 445071A GB 16595/35 A GB16595/35 A GB 16595/35A GB 1659535 A GB1659535 A GB 1659535A GB 445071 A GB445071 A GB 445071A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bias
- rectifier
- modulation
- grid
- 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
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/02—Details
- H03C1/06—Modifications of modulator to reduce distortion, e.g. by feedback, and clearly applicable to more than one type of modulator
Landscapes
- Transmitters (AREA)
Abstract
445,071. Valve modulating circuits. LORENZ AKT.-GES., C., 1, Lorenzweg, Tempelhof, Berlin. June 7, 1935, Nos. 16595 and 16596. Convention dates, Feb. 5 and April 24. [Class 40 (v)] The degree of modulation in a radio beacon transmitter is maintained constant by controlling the bias of the modulating or a preceding stage. The Figure shows a rectifier G, biassed to obtain a delay voltage and fed from the output which controls over a filter the bias of amplifier II. In a modification, Fig. 2 (not shown), part of the non-modulated carrier is rectified and used for bias control since constancy of amplitude of the tone modulation frequency is readily ensured. In the latter arrangement a three electrode rectifier is employed the potential being applied to grid and anode while the grid is given a separate bias potential so that the rectifier working point can be adjusted to obtain a delay voltage independently of the amplifier bias. The rectifier bias may be controlled in dependency with the modulation tone or with the supply voltage.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE445071X | 1935-02-05 | ||
| US37122A US2151921A (en) | 1935-02-05 | 1935-08-21 | Method of modulating high frequency transmitters |
| US218466A US2212568A (en) | 1935-02-05 | 1938-07-09 | Modulated high frequency transmitter system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB445071A true GB445071A (en) | 1936-04-02 |
Family
ID=32073685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16595/35A Expired GB445071A (en) | 1935-02-05 | 1935-06-07 | Improvements in transmitters for radio beacons |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2212568A (en) |
| FR (1) | FR794087A (en) |
| GB (1) | GB445071A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2591732A (en) * | 1945-03-05 | 1952-04-08 | Sheaffer Charles | Radio apparatus |
| US2564928A (en) * | 1947-01-24 | 1951-08-21 | Wurlitzer Co | Amplitude modulated telemetering system |
| GB682808A (en) * | 1950-07-07 | 1952-11-19 | Marconi Wireless Telegraph Co | Improvements in or relating to modulation control circuits for modulated carrier wave transmitters |
-
1935
- 1935-06-07 GB GB16595/35A patent/GB445071A/en not_active Expired
- 1935-08-21 FR FR794087D patent/FR794087A/en not_active Expired
-
1938
- 1938-07-09 US US218466A patent/US2212568A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR794087A (en) | 1936-02-07 |
| US2212568A (en) | 1940-08-27 |
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