GB816134A - Improvements in or relating to telecommunication systems employing automatic gain regulators - Google Patents
Improvements in or relating to telecommunication systems employing automatic gain regulatorsInfo
- Publication number
- GB816134A GB816134A GB3622554A GB3622554A GB816134A GB 816134 A GB816134 A GB 816134A GB 3622554 A GB3622554 A GB 3622554A GB 3622554 A GB3622554 A GB 3622554A GB 816134 A GB816134 A GB 816134A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- gain
- relating
- pilot
- automatic gain
- 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 abstract 1
- 239000000969 carrier Substances 0.000 abstract 1
- 230000001105 regulatory Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/10—Control of transmission; Equalising by pilot signal
Abstract
816,134. Automatic volume control. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. Dec. 1, 1955 [Dec. 14, 1954], No. 36225/54. Class 40 (4). In a carrier transmission system a repeater includes a line amplifier of which the gain is automatically adjusted in accordance with the received level of a pilot current under the control of a feedback loop which includes a Miller integrator circuit arranged to minimize the envelope gain of the regulated amplifier characteristic. As shown, the pilot signal is passed through the line amplifier, selected by means of a narrow-passband filter, passed through a pilot amplifier, and extended over leads A1 and A2 to a detector D. The output from the detector is smoothed by a Miller integrator circuit V1, C and applied through a D.C. amplifier V2 and lead T to a thermistor which controls the gain of the line amplifier in known manner. Reference has been directed by the Comptroller to Specification 705,901, [Group XL (c)].
Publications (1)
Publication Number | Publication Date |
---|---|
GB816134A true GB816134A (en) | 1959-07-08 |
Family
ID=1744514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3622554A Expired GB816134A (en) | 1954-12-14 | Improvements in or relating to telecommunication systems employing automatic gain regulators |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB816134A (en) |
-
1954
- 1954-12-14 GB GB3622554A patent/GB816134A/en not_active Expired
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