Signal coupler using low voltage filtering
US6418221B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1998 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Apr 9, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/007
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A signal coupler is provided which decreases the number of discreet elements required to provide low pass filtering for the plain old telephone service (POTS). The low pass filtering is shifted to areas of the signal coupler circuit which do not operate with the high battery voltage present on telephone lines The low voltage filtering reduces the need for components which are capable of operating in the high voltage environment and therefore reduces the space on the circuit board which is occupied by each of the signal couplers. In this way, the number of individual subscriber lines that a given circuit board can accommodate can be increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.