| 摘要 |
For an actuator that uses a piezoelectric element and drives a movable member by displacing a driving member in sawtooth-like fashion, there is provided an actuator driving circuit that can attain the desired performance while achieving a reduction in power consumption. The actuator moves the driving member and the movable member relative to each other by applying a sinusoidal wave signal to the piezoelectric element, which expands and contracts by application of a driving signal, and thereby causing expanding/contracting displacements expanding and contracting at respectively different speeds in the driving member, and the driving circuit for the actuator is characterized in that a capacitive element, which is connected in series to a parallel circuit containing an inductive element connected in parallel to the piezoelectric element, is provided between the piezoelectric element and a voltage applying circuit.
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