| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor driving device wherein noise is reduced, when a motor is rotating. <P>SOLUTION: The motor driving device is so designed that a motor is driven, by controlling the conduction/non-conduction of a driving transistor for energizing the driving coil for the motor, based on the following: a pulse signal that indicates the relative position between the rotor and the stator of the motor, generated by a position detection unit; and a rotational speed setting voltage for setting the rotational speed of the motor. The motor driving device is provided with a control circuit that generates a delayed pulse signal, obtained by delaying the pulse signal by a delay time, corresponding to the voltage level of the rotational speed setting voltage. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
