Crest factor compensated driver

H - Electricity – 04 – M

Patent

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Details

H04M 1/738 (2006.01) H04B 1/00 (2006.01) H04B 1/74 (2006.01) H04B 3/03 (2006.01) H04M 11/06 (2006.01)

Patent

CA 2380321

A telephone line feed circuit for use with a telecommunication line has dual drivers with differing ratio transformer taps (72) and a sensing circuit so that under normal drive conditions a first driver supplies substantially all power through a first transformer of a first turn ratio (Tsp1) under normal in put signal conditions and a second driver supplies substantially all power through a second transformer of second turns ratio (Tsp2) under high crest factor input signal conditions.

L'invention concerne un circuit d'alimentation de ligne téléphonique, qui est destiné à être utilisé avec une ligne de télécommunication. Ledit circuit d'alimentation de ligne téléphonique comprend deux circuits de commande dotés de prises (72) de transformateur de rapports différents, et un circuit de détection, de telle manière que, dans des conditions normales de commande, un premier circuit de commande fournisse sensiblement toute la puissance par l'intermédiaire d'un premier transformateur, selon un premier rapport du nombre de tours (Tsp1), dans des conditions normales de signal d'entrée, et qu'un second circuit de commande fournisse sensiblement toute la puissance par l'intermédiaire d'un second transformateur, selon un second rapport (Tsp2) du nombre de tours, dans des conditions de signal d'entrée avec facteur de crête élevé.

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