GB720378A - Improvements in or relating to automatic gain control arrangements in multichannel carrier current transmission systems - Google Patents
Improvements in or relating to automatic gain control arrangements in multichannel carrier current transmission systemsInfo
- Publication number
- GB720378A GB720378A GB29891/51A GB2989151A GB720378A GB 720378 A GB720378 A GB 720378A GB 29891/51 A GB29891/51 A GB 29891/51A GB 2989151 A GB2989151 A GB 2989151A GB 720378 A GB720378 A GB 720378A
- Authority
- GB
- United Kingdom
- Prior art keywords
- output
- gain control
- current transmission
- amplifier
- relating
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
Abstract
720,378. Automatic volume control. TELEFONAKTIEBOLAGET L. M. ERICSSON. Dec. 20, 1951 [Dec. 29, 1950], No. 29891/51. Class 40 (4). In a multi-channel carrier-current transmission system having an amplifier FS common to all channels, the amplifier output is maintained constant by connecting to all channels not in use the output of a generator G which is controlled by the total power output of the amplifier. The generator output which may be noise or pure sound or a mixture is connected to the input side of filter-modulators S1-S12 by means of relays R1-R12 which may also serve to mark the channels busy and is controlled by a sample of the amplifier output after rectification in L1. Gain control at the receiver is effected by a current tapped off over a filter F and rectified in L2. Reference has been directed by the Comptroller to Specification 537,893.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE720378X | 1950-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB720378A true GB720378A (en) | 1954-12-15 |
Family
ID=20315961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29891/51A Expired GB720378A (en) | 1950-12-29 | 1951-12-20 | Improvements in or relating to automatic gain control arrangements in multichannel carrier current transmission systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB720378A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10148341B2 (en) | 2017-02-02 | 2018-12-04 | Wilson Electronics, Llc | Independent band detection for network protection |
| US10424822B2 (en) | 2015-10-14 | 2019-09-24 | Wilson Electronics, Llc | Multi-common port multiband filters |
| US10659142B1 (en) | 2018-12-04 | 2020-05-19 | Wilson Electronics, Llc | Independent band detection for network protection |
-
1951
- 1951-12-20 GB GB29891/51A patent/GB720378A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10424822B2 (en) | 2015-10-14 | 2019-09-24 | Wilson Electronics, Llc | Multi-common port multiband filters |
| US10847856B2 (en) | 2015-10-14 | 2020-11-24 | Wilson Electronics, Llc | Multi-common port multiband filters |
| US10148341B2 (en) | 2017-02-02 | 2018-12-04 | Wilson Electronics, Llc | Independent band detection for network protection |
| US10659142B1 (en) | 2018-12-04 | 2020-05-19 | Wilson Electronics, Llc | Independent band detection for network protection |
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