| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor driver circuit that sets the attenuation rate of a drive current in detail. SOLUTION: The motor driver circuit 1 that supplies the drive current to a stepping motor includes an attenuation rate control circuit 15 that mixes a first attenuation rate with a second attenuation rate smaller than the first attenuation rate to set multiple mixing attenuation rates, a control logic circuit 16 that creates an excitation pattern that attenuates the drive current at the mixing attenuation rate, and a drive current output circuit 17 that outputs the drive current to the stepping motor according to the excitation pattern. COPYRIGHT: (C)2009,JPO&INPIT |
