Active rectifier having minimal energy losses

H - Electricity – 02 – M

Patent

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Details

H02M 7/217 (2006.01) H02M 7/219 (2006.01)

Patent

CA 2241271

Active rectifier for use in a power supply circuit, comprising a diode (4) connected between an input terminal (9) and an output terminal (8), characterised in that it further comprises a transistor (2) formed in a substrate (50) and having a control electrode (5) and two conductive electrodes (6, 7), these latter being connected respectively to said input terminal (9) and said output terminal (8), and a comparator (3) supplied by said power supply circuit and having two inputs (+, -) respectively connected to said input (9) and said output (8) terminals, and an output connected to said transistor control electrode (5).

L'invention se rapporte à un redresseur actif destiné à être utilisé dans un circuit d'alimentation électrique et comprenant une diode (4) connectée entre une borne d'entrée (9) et une borne de sortie (8). Ce redresseur se caractérise en ce qu'il comprend en outre un transistor (2) formé dans un substrat (50) et comportant une électrode de commande (5) et deux électrodes conductrices (6, 7), ces dernières étant connectées respectivement à la borne d'entrée (9) et à la borne de sortie (8), et un comparateur (3) alimenté par le circuit d'alimentation électrique et possédant deux entrées (+, -) respectivement connectées aux bornes d'entrée (9) et de sortie (8), et une sortie connectée à cette électrode de commande (5) du transistor.

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