Patent Number: 8,717,714

Title: Magnetic head positioning and driving device including heaters and diodes

Abstract: In a positioning and driving system including a rotating magnetic disk, a magnetic head slider that floats above the surface of the magnetic disk and writes data to and reads data from a track provided on the magnetic disk, an actuator that positions the magnetic head slider in a radial direction of the magnetic disk, and an amplifier that supplies electrical power to the actuator in accordance with the input signal and performs a driving operation, provided is the configuration of an electrothermal actuator driving system that obtains continuous displacement over the entire required operating range with respect to changes in an input voltage by using only one amplifier and that is incorporated into a feedback control system and is suitable for high-speed and high-precision positioning.

Inventors: Otsuki; Haruaki (Tokyo, JP)

Assignee: Hitachi, Ltd.

International Classification: G11B 5/60 (20060101); G11B 21/24 (20060101)

Expiration Date: 5/06/12018