Electronic device for driving an actuator device for a hard disk and for driving a motor that turns the hard disk

摘要

An electronic device for driving an actuator device for a hard disk and a motor for turning the hard disk, the device having a first driving circuit connected to the rotation motor and integrated in a chip of semiconductor material having a substrate defining a reference-potential region, a second driving circuit integrated in the chip and connected to a first actuation stage of the actuator device, and a third driving circuit integrated in the chip and connected to a second actuation stage of the actuator device. The actuator device supports a read/write transducer of the hard disk. The first actuation stage performs a rough displacement of the read/write transducer, while the second actuation stage performs a finer displacement of the same read/write transducer.