Device for triggering an alarm system in the event of insufficiency of the transmission level, for the receiver module of an optical-fiber transmission system
US4399565A · kind A · utility
11Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1981 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Feb 9, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/6911
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An alarm-triggering device for the receiver of an optical-fiber transmission system including in series a filter which has a passband located externally with respect to the band of frequencies employed for optical-fiber transmission and the input of which is connected to an avalanche photodiode, an amplifier, a rectifier, a voltage comparator circuit, and alarm-triggering circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.