ELECTRONIC DEVICE INCLUDING A VERY LOW VOLTAGE GENERATOR POWERING A BATTERY

摘要

The present invention relates to a field of electronic devices including an ultra-low voltage generator arranged to charge a battery by a DC/DC converter for defining the battery and a voltage booster. The electric device (12) including an ultra-low voltage generator to supply power to the battery comprises: a battery (6); an electric energy generator (4); and an induced voltage boost converter (16) between the generator and the battery. The device additionally comprises: a circuit to measure the power supplied by the generator. The circuit is formed by a measuring capacitor (C2) which is arranged in parallel with the battery and includes a measuring terminal connected to a voltage measuring circuit (19), a diode (D2) located between an inductor output terminal and the measuring terminal, and a switch (22) arranged between the measuring terminal and a ground terminal. A control unit is arranged to periodically activate a mode for measuring voltage (V_M) in the measuring terminal. The measuring capacitor is selected so the measuring voltage is far higher than generator voltage in minimum generator voltage for allowing the charge of the battery and is lower than the battery′s voltage.