Electronic hybrid circuit

Details Electronic hybrid circuit Electronic hybrid circuit

1987-11-24

1989-11-14

Ng, Jin F.

Telephonic communications

Subscriber line or transmission line interface

Hybrid circuit

379398, H04B 303

Patent

active

048812625

ABSTRACT:
An analog electronic hybrid circuit having a complex internal impedance includes a coupling transformer. The loss resistances of the transformer are used together with a measuring resistor to establish a predetermined complex internal impedance, thereby providing a balancing network. In one embodiment, nonideal characteristics of the transformer (nonlinearities, parasitics) have only very little effect because the transformer is contained in a feedback loop.

REFERENCES:
patent: 3973089 (1976-08-01), Puchette
patent: 3993880 (1976-11-01), O'Neill
patent: 4484032 (1984-11-01), Rosenbaum

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