Device for applying a voltage to an electronic circuit,...

G - Physics – 01 – R

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G01R 19/00 (2006.01) G01R 1/20 (2006.01) G01R 19/02 (2006.01) H02M 3/158 (2006.01) H02M 7/217 (2006.01)

Patent

CA 2125267

n apparatus to supply a feed voltage to an electronic circuit, comprising a current transformer with a primary (10) and a secondary circuit (11), a bridge rectifier (12) at the secondary circuit terminals and, at the output terminals (P, Q) of the bridge rectifier, a first condenser (C1) in parallel with a first resistor (R1) at whose terminals the said feed voltage is taken off (U), with a first switch (I1) being provided between the output terminals (P, Q) of the bridge rectifier, the characteristic feature of which is that it includes, between the output terminals (P,Q) of the bridge rectifier, a branch including another condenser connected in series (C2), another switch (I2) and another resistor (R2), the first switch (I1) being operated by a first threshold detector (DS2) at the terminals of the second condenser (C2) and the second switch (I2) being operated by a second threshold detector (DS1) at the terminals of the first condenser (C1).

Dispositif pour la fourniture d'une tension d'alimentation à un circuit électronique, ledit dispositif comprenant un transformateur de courant ayant un circuit primaire (10) et un circuit secondaire (11), un pont redresseur (12) aux bornes du circuit secondaire, et aux bornes de sortie (P, Q) du pont redresseur, un premier condensateur (C1) en parallèle avec une première résistance (R1) aux bornes de laquelle est prélevée ladite tension d'alimentation (U), un premier interrupteur (I1) étant disposé entre les bornes de sortie (P, Q) du pont redresseur, caractérisé en ce qu'il comprend, entre les bornes de sortie (P,Q) du pont redresseur, une branche comprenant en série un second condensateur (C2), un second interrupteur (I2) et une seconde résistance (R2), le premier interrupteur (I1) étant commandé par un premier détecteur à seuil (DS2) aux bornes du second condensateur (C2), le second interrupteur (I2) étant commandé par un second détecteur à seuil (DS1) aux bornes du premier condensateur (C1).

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