| 摘要 |
<p>PURPOSE: A motor driving circuit is provided to shorten oscillation convergence by not depending on a resonant frequency of an actuator. CONSTITUTION: A filter circuit(13a) damps a frequency band from a target current signals. The frequency band includes a resonant frequency of an actuator A digital to analog converter(14) converts the output signal of the filter circuit into an analog signal. The digital to analog converter outputs a current control signal. A drive circuit(15a) supplies a driving current to a voice coil motor. The filter circuit includes a digital notch filter and a digital low pass filter.</p> |
