High integrity optical data transmission system
US4850043A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1988 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | May 23, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/564
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A high integrity optical data transmission system connecting a plurality of user I/O devices includes an optical path terminating at each user I/O device at a two port interface having a pair of optical transmitter and a pair of optical receivers for optically communicating the binary logic ONE and ZERO states and the system no data transmission state. A portion of the light transmitted over the optical path is fed back to the interface to control the transmitted light intensity. The two photodiode light receivers are closely matched in electrical characteristics and are biased by adjustable DC voltage sources so that the effects of photodiode dark currents on a trans-impedance amplifier are minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.