Disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorTomokazu Okubo
Life of this patent
Estimating the term…
Abstract
According to an embodiment, there is provided a disk device including a disk, a head, a preamplifier and a controller. The head writes information to the disk according to a write current. The preamplifier causes the write current to flow through the head. The controller is capable of causing the preamplifier to perform current zero control for maintaining an amplitude of the write current at zero, and is capable of changing a time for maintaining the amplitude of the write current at zero according to a pattern of write data.
Claims19
A disk device comprising:
- a disk;
- a head that writes information to the disk according to a write current;
- a preamplifier that causes the write current to flow through the head;
- and
- a controller capable of causing the preamplifier to perform current zero control for maintaining an amplitude of the write current at zero, and capable of changing a time for maintaining the amplitude of the write current at zero according to a pattern of write data,
- wherein the controller adds a first delay amount to the write data to generate a first signal, and adds a second delay amount to the write data according to a pattern of the write data to generate a second signal.
A disk device comprising:
- a disk;
- a head that writes write data to the disk according to a write current;
- a preamplifier that supplies the write current to the head and is capable of maintaining an amplitude of the write current at zero for a predetermined period;
- and
- a controller that sets the predetermined period to a first period in a case where a pattern of the write data is a first pattern, and is capable of setting the predetermined period to a second period different from the first period in a case where the pattern of the write data is a second pattern different from the first pattern.
Dependencies are inferred from the claim text.