Electro-optical data handling system with noise immunity
US4786797A · kind A · utility
8Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1987 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Dec 28, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/40
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A source of light modulated by input data provides the modulated light to a phototransistor. A capacitor couples the emitter of the phototransistor to ground. A discharging transistor switch is coupled across the capacitor and a voltage comparator is coupled to the phototransistor emitter for providing a signal when the voltage across the capacitor exceeds a predetermined threshold. A microprocessor coupled to the comparator actuates the discharging switch in accordance with the comparator output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.