| 摘要 |
<p>The circuit enables the cumulative status of the battery to be monitored, as result of integration of current measurements. The device for measuring the current exchange between a battery (1) and the electrical circuits (19) of a portable telephone comprises a current sensor (21) connecting the battery to the circuits. The sensor signal is connected to a first input (22) of a first integrator (22-27), integrating the measured current and controlling a comparator (28, 29, 34) detecting the breakthrough of the integral through a high threshold (Vs+). The second input (23) of the integrator receives a calibrated feedback circuit. A second integrator (12-17) integrates the feedback signal, and provides a measure of the current exchanged between battery and circuit.</p> |
