Signal corrected optocoupled device
US4190747A · kind A · utility
12Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Apr 5, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/003
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A remote gain controlled optocoupled device is disclosed utilizing a DC reference voltage in the output section to compensate for variations in the optocoupling characteristics of the circuit. The DC voltage level output of the photodetector, which is a function of the light transfer characteristics of the circuit, is compared to a remotely controlled reference DC level. The output AC signal level, which substantially tracks the DC voltage output, is gain adjusted under control of the compared DC voltage levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.