Electronic telephone interface circuit

Details Electronic telephone interface circuit Electronic telephone interface circuit

1983-04-21

1984-08-14

Pellinen, A. D.

179 81B, H04M 1100

Patent

active

044659032

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.

REFERENCES:
patent: 4203009 (1980-05-01), Tattersall
patent: 4214130 (1980-07-01), Questad
patent: 4366347 (1982-12-01), Takatsuki et al.

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