Electro-optical system using light modulation
US4654892A · kind A · utility
3Cited by
5References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1985 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Apr 15, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electro-optical system includes a phototransistor having collector and emitter electrodes and adapted to receive modulated light representing data and generating current in a current flow path representative of the received light. A load is placed in the current flow path and generates a voltage due to the current flow, and means are provided for sensing the generated voltage and using that voltage in a feedback circuit to the phototransistor to maintain the collector base junction voltage of the phototransistor constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.