Electro-optical isolator circuit for line powered modem
US4417099A · kind A · utility
136Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1980 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | Nov 3, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electro-optical isolator circuit especially adapted for operation in a modem which is powered solely from the telephone line and employed to isolate the line from utilization equipment. The isolator includes a guard circuit which substantially improves low current operating speed such that an inexpensive electro-optical component can be utilized at very low drive levels to achieve response times less than 10 microseconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.