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专利名称：Driving device and driving circuit for a
vibration actuator
发明人：Takeshi Iwasa,Kenichi Kataoka申请号：US13911190申请日：20130606公开号：US09054606B2公开日：20150609
专利附图：
摘要：A driving device, including a drive signal generating section configured tovariably control a frequency or an amplitude of an application voltage to a vibrationmember, includes a variable period setting section configured to output a value of a
PWM period, the set value being set so that an average value of PWM periods in onetarget period of the application voltage is one fraction of an integer number of thetarget period by variably adjusting the PWM periods in an aperiodic manner; a drivewaveform information output section; and a variable period PWM signal generatingsection configured to generate a PWM signal based on the set value of the PWM periodoutput from the variable period setting section and drive waveform information of theapplication voltage, wherein the drive signal generating section is a digital circuit.
申请人：CANON KABUSHIKI KAISHA
地址：Tokyo JP
国籍：JP
代理机构：Fitzpatrick, Cella, Harper & Scinto
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