Automatic filter for asymmetric digital subscriber line system
US6470059B2 · kind B2 · utility
10Cited by
14References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 28, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Jan 30, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B15/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus for filtering radio frequency interference in a signal transmitted on a twisted-pair communication channel such as an ADSL transmission line. The apparatus includes a filter adapted to be selectively engaged in-line with the communication channel by a switch or switches when the differential mode noise in any predetermined frequency sub-band exceeds a threshold noise level, or the sum of the sub-band noise signals exceeds a wideband threshold noise value. When the filter is not engaged, it is isolated from the communication channel by a bypass switch or pair of bypass switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.