| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lock detection circuit which can prevent misdetection of motor lock, even when the number of rotations of a motor is small. <P>SOLUTION: A lock detection circuit includes a charging/discharging circuit 111 for controlling charging/discharging by the rotation signal of a motor;a charging/discharging circuit 112 for controlling charging/discharging by an inverted signal of the rotation signal;and a charging/discharging circuit 113 for controlling charging/discharging by the outputs from the charging/discharging circuits 111 and 112, wherein the charging/discharging circuit 113 performs discharge twice, in a single period for the rotation signal of a motor. <P>COPYRIGHT: (C)2009,JPO&INPIT |
