| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery remaining quantity determination circuit capable of precisely determining the battery remaining quantity, for different kinds of batteries, without driving an actuator circuit. SOLUTION: A transistor 5 is turned on by the output from a terminal P3 of a microcomputer 2, and the output voltage of the battery 1 with which resistors 7 and 8 are connected is calculated, from the voltage value detected at a terminal P5. Further, a transistor 6 is turned on only during a short period of time, by outputting a pulse signal by the output from a terminal P4, and the output voltage of the battery 1 with which a resistor 10 is connected is calculated, from the voltage value detected at the terminal P5. When both of the voltage values thus detected are equal to or more than a prescribed value, the subsequent battery remaining quantity is determined, on the basis of the output voltage of the battery 1 with which the resisters 7 and 8 are connected. COPYRIGHT: (C)2005,JPO&NCIPI
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