Electronic telephone interface circuit
US4465903A · kind A · utility
36Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1983 |
| Grant date | Aug 14, 1984 |
| Priority date | — |
| Expiry date | Apr 21, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electronic telephone interface circuit having a simplified, inductorless electronic gyrator circuit which also functions as an amplifying impedance convertor, and further having passive current and voltage limiting protection devices and an extremely fast active current limiting circuit. The system is particularly suitable for coupling a high impedance electronic system to a telephone communications system, and is adapted to permit the interface circuit and the electronic system to be powered solely from the telephone system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.