Signal level compensation in an in-line data communication system
US4621367A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1983 |
| Grant date | Nov 4, 1986 |
| Priority date | — |
| Expiry date | Jul 26, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/1461
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An in-line data communication system includes a bidirectional communication cable for connecting at least two terminal stations. A signal level compensation circuit is connected to the bidirectional communication cable for compensating for signal attenuation in the bidirectional communication cable. The signal level compensation circuit includes first and second amplifying circuits connected to each other in a parallel fashion. When a data signal is transmitted in one direction in the bidirectional communication cable, the first amplifying circuit is enabled and the second amplifying circuit is disabled. When the data signal is transmitted in the opposing direction, the first amplifying circuit is disabled and the second amplifying circuit is enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.