AKM has developed ultra-low noise coreless current sensors for improving the audio quality of large-sized speakers such as subwoofers. The AK310x series is suitable for a system which controls voice-coil motion in speakers (motional feedback) by current feedback. AK3101 adopts an ultra-small coreless package which is compliant with safety standards, suitable for applications such as motor control for industrial equipment. Since AK3101 has ultra-low noise, it can detect the current by high resolution, which contributes to high-precision torque control of the motor.