A device for supplying a voltage to an electronic circuit, in particular to an electronic circuit associated with a current sensor placed on an electrical line.

摘要

Device for the provision of a supply voltage to an electronic circuit, said device comprising a current transformer having a primary circuit (10) and a secondary circuit (11), a rectifier bridge (12) at the terminals of the secondary circuit, and at the output terminals (p, q) of the rectifier bridge, a first capacitor (c1) in parallel with a first resistor (r1) at the terminals of which is taken off the supply voltage (u), a first switch (i1) being disposed between the output terminals (p, q) of the rectifier bridge, characterized in that it comprises, between the output terminals (p, q) of the rectifier bridge, a branch comprising in series a second capacitor (c2), a second switch (i2) and a second resistor (r2), the first switch (i1) being controlled by a first threshold detector (ds2) at the terminals of the second capacitor (c2), the second switch (i2) being controlled by a second threshold detector (ds1) at the terminals of the first capacitor (c1).