Power regulation system for repeatered telephone transmission lines
US4160884A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1978 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Feb 6, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S323/902
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone transmission system has repeaters spaced along both the transmit and receive legs of the transmission line, with a power supply for the repeaters including a current regulator having positive and negative supply lines connecting the power supply to the two legs of the transmission line. Current surge protectors are connected from the two legs of the transmission line to ground. A pair of current sensors responsive to the current levels in the positive and negative supply lines, between the power supply and the current surge protectors closest to the power supply, produce output signals representative of the respective current levels. A control signal generating means receives the output signals from the current sensors and produces a control signal in response to a deviation of the higher current in the supply lines from a preselected reference level. The control signal is supplied to the current regulator to maintain the higher current level in the supply lines at the preselected reference level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.