| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the number of times of charging/discharging of the secondary power supply for a backup circuit, and thereby prevent the life of the secondary power supply from being shortened. <P>SOLUTION: It is made possible to operate the backup circuit only when backup operation becomes necessary for the backup circuit as a system. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
