| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize optimal stop control at the time of an end of a drive of a linear vibration motor. <P>SOLUTION: In a drive control circuit 100 of the linear vibration motor 200, a driving signal generating part 10 generates a driving signal, which has a reverse phase against a phase of a driving signal having been generated at the time of the drive and includes a high impedance period in which a driver 20 is controlled in a high impedance state, after the end of the drive of the linear vibration motor 200. An induced voltage detection section 30 detects an induced voltage generated in a coil L1 during a high impedance. A comparator 41 is provided with a function as a hysteresis comparator in which an output level does not change in a prescribed dead zone, and outputs a high level signal or a low level signal in the high impedance period. The driving signal generating part 10 judges that the linear vibration motor 200 has stopped when an in-phase signal is output successively from the comparator 41 in said continuous high impedance period. <P>COPYRIGHT: (C)2012,JPO&INPIT |
