Loop-circuit for telephone line

Details Loop-circuit for telephone line Loop-circuit for telephone line

1983-06-30

1985-08-13

Rubinson, Gene Z.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

179 16AA, 307311, H03K 1700, H04M 131

Patent

active

045352020

ABSTRACT:
A loop-circuit for a telephone line is provided that includes a transistor having a first electrode directly connected to one of the wires of the line, a second electrode connected to the other of the wires of the line by means of a resistor, a gate electrode thereof being connected via a resistor to one of the wires of the line, and by means of a capacitor to the other wire of the line, wherein a switch is arranged to cut-off the transistor and another switch is arranged or provided to disconnect one of the plates of the capacitor from the rest of the circuit.

REFERENCES:
patent: 3801837 (1974-04-01), Pease et al.
patent: 3987319 (1976-10-01), Nirschl
patent: 4037120 (1977-07-01), Colardelle et al.
patent: 4282604 (1981-08-01), Jefferson
patent: 4476351 (1984-10-01), Beegle et al.
Millman, Jacob, Microelectronics, 1979, McGraw-Hill Book Co., pp. 689-691.

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