Remote feed circuit in communication systems
US5543669A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1994 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Dec 13, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/001
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In communication systems, a dc voltage source can be connected via a first and a second winding of an input transformer and a subscriber line to every communication terminal equipment device by using an electronic switch. In case of an overload, the turn-off duration, i.e. the time until the disconnect of the dc voltage source is influenced dependent on a load-generated loop current by using an integrating element and a comparator. As a result thereof, short turn-off durations and, consequently, significantly reduced thermal loads on the electronic switch occur given substantial overloads. The present invention allows the use of electronic switches having a lower maximum load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.