Low voltage balanced hybrid circuit with operational amplifiers

Details Low voltage balanced hybrid circuit with operational amplifiers Low voltage balanced hybrid circuit with operational amplifiers

1994-03-09

1995-12-26

Hofsass, Jeffery A.

Telephonic communications

Subscriber line or transmission line interface

Hybrid circuit

379405, 379399, 379345, H04M 900

Patent

active

054795044

ABSTRACT:
A hybrid circuit applies a data sending signal and an inverted data sending signal to the ends of a primary coil, so that the primary coil receives voltages based on the sum of the voltages of the two signals. As a result, the gains of internal amplifiers can be small, thereby maintaining low level voltages in the hybrid circuit. In addition, because the hybrid circuit is balanced, grounding is unnecessary and noise is kept at a low level.

REFERENCES:
patent: 4292479 (1981-09-01), Chataignan et al.
patent: 4301336 (1981-11-01), Muting
patent: 4358643 (1982-11-01), Levy
patent: 5280526 (1994-01-01), Laturell
"Novel Active Hybrid Circuit and its Applications", 5. B. Park, Electronics Letters vol. 11, No. 16, pp. 362-363, 7 Aug. 1975.

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