Line interface apparatus and method for isolating data terminal equipment from the line
US5574749A · kind A · utility
10Cited by
2References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1994 |
| Grant date | Nov 12, 1996 |
| Priority date | — |
| Expiry date | Aug 1, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2203/5491
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved isolation circuit for protecting data communication equipment from high voltages on a transmission line has two mixers. The first dual balanced mixer (DBMX) translates a data signal on the transmission line to a high frequency and is coupled with an isolation circuit to the second DBMX. The second DBMX then translates the output of the first DBMX to an isolated data signal with the same frequency content as the original data signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.