Patent ID: 6853532

Claim:
An actuator drive apparatus comprising: a movable section; a fixed section; an elastic member for connecting said movable section with said fixed section; a magnetic field generation member; a drive coil provided on the movable section, the drive coil being driven with a drive signal having a rectangular wave to generate a vibration of the movable section; a detection coil provided on the movable section for detecting an angular velocity of the vibration of the movable section; a high frequency elimination circuit for eliminating a specific high frequency component of an output signal of said detection coil; and a control circuit for applying the drive signal having the rectangular wave to said drive coil, said movable section thereby making a movement relative to said fixed section in the resonance state, said control circuit feeding back an output signal of said detection coil from which said specific high frequency component is eliminated to said drive signal, thereby maintaining said movement of said movable section relative to said fixed section in the resonance state; wherein said specific high frequency component is generated due to mutual induction of said drive coil and said detection coil and appears in said output signal of said detection coil in synchronism with a leading and trailing edge of the rectangular wave.