Electronic device including a very low voltage generator powering a battery
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United States of America Patent
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Oct 17, 2017
Grant Date -
Nov 26, 2015
app pub date -
May 6, 2015
filing date -
May 26, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
The electronic device includes a battery, an electrical energy generator and, between the generator and the battery, an inductive voltage boost converter. The device further includes a circuit for measuring the voltage supplied by the generator which is formed by: a measuring capacitor arranged in parallel with the battery and having a measuring terminal connected to a voltage measuring circuit, a diode located between the inductor output terminal and the measuring terminal, a switch arranged between the measuring terminal and the earth terminal. A control unit is arranged to periodically activate a mode for measuring a voltage at the measuring terminal. The measuring capacitor is selected such that the measuring voltage is much higher than the generator voltage and lower than the battery voltage at a minimum generator voltage allowing charging of the battery.
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