Controller for a hard disk drive with control circuits for head actuator, spindle motor and piezoelectric head micropositioners which are integrated on the same substrate

摘要

The electronic device (100) for driving an actuator device (13) for a hard disk (1) and a motor (6) for turning the hard disk comprises a first driving circuit (101) connected to the rotation motor (6) and integrated in a chip of semiconductor material (50) having a substrate (200) defining a reference-potential region (GND). The electronic device (100) further comprises a second driving circuit (102) integrated in the chip (50) and connected to a first actuation stage (11) of the actuator device (13), and a third driving circuit (103), also integrated in the chip (50) and connected to a second actuation stage (12) of the actuator device (13). The actuator device (13) supports a read/write transducer (17) of the hard disk (1). In particular, the first actuation stage (11) performs a rough displacement of the read/write transducer (17), whilst the second actuation stage (12) performs a finer displacement of the same read/write transducer. <IMAGE>