Patent ID: 8606533
Filing Date: 2013-12-10
Classification: G01R

Abstract:
1. A battery gas-gauge circuit for measuring battery power of a battery of an electronic device, comprising: a sensing resistor, wherein a first voltage signal and a second voltage signal at two ends of the sensing resistor are in response to a battery current between the battery and the sensing resistor; a voltage-to-current conversion circuit for converting the first voltage signal and the second voltage signal to a first current signal and a second current signal, respectively; a power-management unit for recording the battery current and obtaining the battery power of the battery according to the battery current and a power-saving mode current, in response to the determination circuit determining that the battery current is a leakage current; wherein the operation mode of the electronic device corresponds to a predetermined signal, and the predetermined signal causes the power-management unit to stop recording the battery current when the electronic device leaves a power saving mode.