Current distribution circuit having an additional parallel DC-current sinking branch
US6184742A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1998 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | May 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/265
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A current distribution circuit for application in a communication device, such as a telephone subscriber circuit comprises a first current sinking branch, which is connected in parallel to a second current sinking branch. Both branches sink at least the DC current on the telephone line, whereas an excess current in the DC line is taken up by the second current sinking branch, which is provided with a current sinking transistor, whose collector/emitter voltage is relatively large. This leads to a reduced effectively needed chip area. The DC line-current can be measured by means of a low pass filter, preferable connected to a current mirror means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.