AC coupled fiber optic receiver with DC coupled characteristics
US5373388A · kind A · utility
6Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1993 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Feb 25, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/6933
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An AC-coupled receiver is provided which allows data with long periods of no signal sent on a fiber optic bus to be received without the normally required preamble. The receiver provides a voltage signal which is AC-coupled to one side of a differential amplifier with a delayed voltage signal AC-coupled to the other input of the differential amplifier. If the time constant of the AC coupling network is much longer than the signal baud time, low-frequency variations at the two inputs of the differential amplifier will be nearly identical and the low frequency signals will effectively cancel each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.