Driving circuit of a vibration wave motor

摘要

Disclosed is a driving circuit of a vibration wave motor in which a travelling vibration wave is generated in a vibratory member having a pair of driving electrostrictive element groups arranged or polarized in the fashion of a phase difference by a voltage being applied to the electrostrictive element groups, and the phase of an output signal put out by the vibration of the vibratory member being detected is shifted by a predetermined amount and the vibratory member is induced into a resonating state by the output signal being applied to the driving electrostrictive element groups and by an actuating pulse including a wide band frequency component being applied to the vibratory member particularly during the initial state thereof in which the vibratory member is not resonating.