| 摘要 |
<p>Disclosed is an apparatus for driving an actuator, which is provided with: a constant current circuit, which supplies a constant current to an SMA wire; a resistance value detecting circuit (111), which detects the resistance value of the SMA wire when a current is carried in the wire, and which adjusts, corresponding to the detected resistance value, the value of the constant current flowing in the constant current circuit; and a pulse width modulation circuit (110), which performs, on the basis of a difference between the potentials at both the ends of the SMA wire, on/off control of a current source transistor of the constant current circuit by means of pulse signals with modulated pulse width.</p> |
