| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric actuator control device capable of reducing sound generated from a piezoelectric element. <P>SOLUTION: In a piezoelectric actuator 100 having a bimorph type piezoelectric element 110 as a first piezoelectric element and a laminated piezoelectric element 120 as a second piezoelectric element, the piezoelectric actuator controller 200 to supply a control current includes the followings: a counter 221 which outputs a plurality of notification signals one by one periodically and a second step-up circuit 232 which forms a second voltage V2 gently increased and decreased in the second step-up circuit 232 based on the notification signals from the counter 221. Then, PWM signals amplified by this second voltage V2 thus gently increased and decreased are applied to the laminated piezoelectric element 120. <P>COPYRIGHT: (C)2011,JPO&INPIT |
