| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery condition monitoring circuit which reduces the manufacturing cost of a battery device, and its battery device. SOLUTION: A charge/discharge control transistor is structured to be operated by a low-level signal based on a high-level signal and a ground voltage VSS based on the voltage of a voltage regulator which is lower than a power supply voltage VDD based on a battery voltage. Accordingly, the charge/discharge control transistor can use an element with low resistance to pressure because the voltage applied to a gate becomes low. The cost of the charge/discharge transistor becomes low, and the manufacturing cost of the battery device also becomes low. COPYRIGHT: (C)2009,JPO&INPIT |
