| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor control circuit which can prevent the starting time of a motor from being delayed, by preventing the starting time of the motor from becoming longer and the rotating speed of the motor from becoming unstable when controlling the rotation of the motor. SOLUTION: A motor control circuit 24 is provided with a speed control circuit 15 which outputs a speed error signal based on the output FG of a frequency power generator provided to a motor 25, and a phase control circuit 18 which outputs a phase error signal by comparing the output FG with the output FB of a frequency divider 19 which divides a reference clock CK1 by using the output FB as a phase basis. The motor control circuit 24 is constituted to control the rotation of the motor 25 by synthesizing the speed error signal with the phase error signal and feeding back the resultant signal to the motor 25 and, at the same time, to connect the trigger pulse T1 outputted from a trigger pulse generating circuit 2 to the frequency divider 19, so that the divider 19 may divide the reference clock CK1 synchronously to the trigger pulse T1. |
