Integrated circuit for controlling an information storage disk

Details Integrated circuit for controlling an information storage disk Integrated circuit for controlling an information storage disk

1996-06-24

1998-03-24

Ip, Paul

Electricity: motive power systems

Positional servo systems

Adaptive or optimizing systems including 'bang-bang' servos

318560, 318138, 318254, 360 7301, H02P 602, H02P 118, H02K 2900

Patent

active

057316775

ABSTRACT:
A circuit which energizes a disk drive motor via three branches U, V, W each including 2 switching elements in series and which energizes an actuator for the displacement of the read-write heads via two branches each including 2 switching elements, which circuit comprises isolating devices to allow energization by the drive motor operating as a generator, for a withdrawal of the heads to a safe position during a supply voltage cut.

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Williams et al., "A Fully Integrated HDD Power IC with Novel Head Retract Feature", IEEE Catalog No. 94CH3377-9, Session 8, Article 8.4, 6th Intl. Symposium on Pwer Semiconductor Devices & Integrated Circuits, May 31-Jun. 2, 1994, pp. 391-396.

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