GB486372A - Automatic volume control devices for wave transmission systems - Google Patents
Automatic volume control devices for wave transmission systemsInfo
- Publication number
- GB486372A GB486372A GB21191/37A GB2119137A GB486372A GB 486372 A GB486372 A GB 486372A GB 21191/37 A GB21191/37 A GB 21191/37A GB 2119137 A GB2119137 A GB 2119137A GB 486372 A GB486372 A GB 486372A
- Authority
- GB
- United Kingdom
- Prior art keywords
- network
- valve
- volume control
- impedance
- automatic volume
- 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
- 230000005540 biological transmission Effects 0.000 title 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
Landscapes
- Magnetically Actuated Valves (AREA)
Abstract
486,372. Automatic volume control. STANDARD TELEPHONES & CABLES, Ltd. July 30, 1937, No. 21191. Convention date, Sept. 19, 1936. [Class 40 (iv)] [Also in Group XL] In a thermionic amplifier automatic gain control is effected by an unbalanced coupling network R1 .. R4 the unbalance of which is varied by one or more variable impedances shunting one or more of the arms of the network. The Figure shows an arrangement in which the output of valve V1 is applied to one diagonal of the network and the input to the valve V2 is taken from the other diagonal of the network. A valve V4 is shunted across the arm R4 and its impedance is varied by rectified signal voltage. Two opposite branches of the bridge may be shunted by valves acting as variable impedances and the impedance variation may be according to any desired law. Alternatively the variable impedance may be a coil with a variably magnetized core.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR486372X | 1936-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB486372A true GB486372A (en) | 1938-06-02 |
Family
ID=8904001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21191/37A Expired GB486372A (en) | 1936-09-19 | 1937-07-30 | Automatic volume control devices for wave transmission systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB486372A (en) |
-
1937
- 1937-07-30 GB GB21191/37A patent/GB486372A/en not_active Expired
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