H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 1/76 (2006.01) H04B 1/58 (2006.01)
Patent
CA 2356952
A method and apparatus for providing an improved telephone hybrid function is provided. The present invention uses a transformer (340) having a galvanically isolated sense winding (348) to improve hybrid performance. Performance improvements include removing the effects of variations in winding resistance, independently adjsuting a pick-off voltage at (217), reducing the effects of transformer leakage inductance, providing DC isolation between circuits and increasing the signal to noise ratio at the receiver (290).
L'invention porte sur un procédé et un appareil assurant une fonction téléphonique hybride améliorée et recourant à un transformateur (340) comportant un enroulement de détection isolé (348) en améliorant les performances hybrides. L'amélioration des performances comprend: l'élimination des variations de la résistance de l'enroulement; le réglage de manière indépendante de la tension de capture (217); la réduction de l'inductance de fuite du transformateur; la mise en place d'une isolation c.c. entre les circuits, et l'augmentation du rapport signal/bruit au niveau du récepteur (290).
Adtran
Smart & Biggar
LandOfFree
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