Current limited subscriber interface circuit
US5315653A · kind A · utility
2Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 1992 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | May 5, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electronic interface circuit between a telephone subscriber line and a telephone main exchange is disclosed which forms, with the main exchange battery, a supply bridge for the telephone line, with limitation of the line current to a predetermined threshold value. The voltage/current characteristic of the supply bridge is balanced for lower values of the line current than the threshold current and is unbalanced whenever the line current attains said threshold current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.