Telephonic communications – Repeater – With frequency discriminator or negative impedance element
Patent
1984-09-13
1987-07-21
Rubinson, Gene Z.
Telephonic communications
Repeater
With frequency discriminator or negative impedance element
379398, 379413, H04B 316
Patent
active
046823557
ABSTRACT:
The invention relates to a telephone subscriber electronic feeding bridge which includes a transformer with three windings, between the line of the sub set and the connection network of the telephone unit automatic exchange or autoswitch of which it forms a part. A capacitor is interposed on one of the two wires of the line, connected furthermore to feed resistors. The third winding of the transformer, associated with the winding of the line of the set, is looped on a negative impedance. This arrangement allows impedance matching both in direct current and in alternating current.
REFERENCES:
patent: 3548109 (1970-12-01), Schnurr
patent: 3562561 (1971-02-01), Klosterman
patent: 3627952 (1971-12-01), Person
patent: 3987375 (1976-10-01), May et al.
patent: 4197431 (1980-04-01), Vis
patent: 4532384 (1985-07-01), Keriakos et al.
M. Ferry, D. Reynes, J. Suzzoni; "Adjustable Resistance Circuit"; IBM Technical Disclosure Bulletin; vol. 22, No. 11; Apr. 1980; p. 4955.
Bailly Francois P.
Bourgoin Alain
Myers Randall P.
Rubinson Gene Z.
Societe Anonyme de Telecommunications
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