| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotation control device capable of generating a DC power supply required for drive of a logic circuit from a pulse width modulation clock signal. <P>SOLUTION: The rotation control apparatus 100 with a logic circuit for controlling the number of rotations of a motor based on a pulse width modulation clock signal and a motor RPM clock signal generated by the rotation of the motor. The rotation control apparatus 100 further includes a smoothing circuit 115 for smoothing the pulse width modulation clock signal to output the smoothed signal as a DC voltage, and a power supply generating circuit 115c for converting the DC voltage output from the smoothing circuit 115 into a DC voltage required for drive of the logic circuit. <P>COPYRIGHT: (C)2010,JPO&INPIT |
