| 摘要 |
<p>A PWM control system includes: PWM basic wave generation means (12) for forming a PWM basic wave by dividing a basic frequency signal; PWM cycle setting means (22) for setting a PWM cycle according to the PWM basic wave; duty ratio formation means (24) for forming a duty ratio within the PWM cycle (N/M: N <= M, wherein M is the largest clock number); and PWM control signal output means for outputting the PWM control signal having the duty ratio to a load drive circuit.</p> |
