DETECTOR FOR DUTY OF SIGNAL AND DRIVING APPARATUS FOR MOTOR HAVING THE SAME

摘要

The present invention relates to a signal duty detector, which counts a signal of which a level is higher than a predetermined level among signals existing in a predetermined period of a pulse width modulation (PWM) signal and duty of the PWM signal, and a motor driving apparatus having the same, and provided are a signal duty detector and a motor driving apparatus having the same comprising: a level detecting unit for detecting a level of an input signal; a counter for counting the level detected by the level detecting unit; and a duty calculating unit for calculating duty of the input signal based on the level counted by the counter. [Reference numerals] (111) Level detecting unit;(112) Counter;(113) Duty calculating unit;(114) Timer;(AA) PWM signal