Patent ID: 6229402
Filing Date: 2001-05-08
Classification: H02N

Abstract:
A driving apparatus of a vibration type actuator for applying a driving signal to an electro-mechanical energy conversion element portion of a vibration member so as to excite vibration in the vibration member of said vibration type actuator, comprising:a reference pulse generating circuit for generating a reference pulse signal;a frequency dividing circuit for outputting a pulse signal having a period of an integer multiple of a period of the reference pulse signal;a time delaying circuit for forming a delayed pulse signal by changing a shift amount of an edge of a pulse signal from said frequency dividing circuit on the basis of delay data every time a pulse signal is output from said frequency dividing means, said time delaying circuit including pulse forming means for forming a plurality of pulses shifted from each other on a unit time basis and selecting means for selecting one of the pulses formed by said pulse forming means on the basis of delay data, said time delaying circuit forming a pulse signal corresponding to a period of the selected pulse as the delayed pulse signal; anda driving circuit for applying a driving signal to said electro-mechanical energy conversion element portion at a frequency corresponding to the delayed pulse signal.