Metallic current limiter
US5050210A · kind A · utility
6Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Apr 3, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circuit for the non-linear limiting of the metallic current flowing in telephone line conductors. The circuit senses the metallic current flowing in the conductors. If that current exceeds a predetermined limit, the circuit provides from a controlled and variable voltage source a voltage across the conductors whose amplitude is reduced from the essentially constant amplitude voltage provided across the conductors when the current does not exceed the limit. The reduction in voltage amplitude is sufficient to maintain the metallic current at the limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.