US 6,721,127 B2 · Electronic device for driving an actuator device for a hard disk and for driving a motor that turns the hard disk

Abstract

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.

Claims18

Dependent claims

An electronic device for driving an actuator device for a hard disk and a motor for turning the hard disk, said actuator device supporting a read/write transducer and including a first actuation stage and a second actuation stage which respectively control a first displacement and second displacement of said read/write transducer, said electronic device comprising:

a first driving circuit connected to said rotation motor and integrated in a chip of semiconductor material that has a substrate defining a reference-potential region;
a second driving circuit integrated in said chip and connected to the first actuation stage;
and
a third driving circuit integrated in a double-insulation structure in said chip to be electrically isolated from the substrate, the third driving circuit connected to the second actuation stage of the actuator device.

1 more element

A hard disk system, comprising

a hard disk and a motor configured for turning the hard disk;
a read/write transducer associated with the hard disk and configured for displacement along a first axis;
and
an actuator device coupled to the motor and to the read/write transducer, the actuator device comprising:
a first driving circuit connected to the motor and configured to control rotation of the motor, the first driving circuit integrated in a chip of semiconductor material having a substrate defining a reference-potential region;
a second driving circuit integrated in the chip of semiconductor material and connected to a first actuation stage that is configured to perform a rough displacement of the read/write transducer;
and
a third driving circuit integrated in a double insulation structure in the chip of semiconductor material to be electrically isolated from a substrate of the chip, the third driving circuit connected to a second actuation stage that is configured to perform a finer displacement of the read/write transducer.

5 more elements

Dependencies are inferred from the claim text.

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

Life of this patent

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

Life of this patent

Abstract

Claims18