Back to results
US 10,650,858 B2Granted
Switching circuit on power supply for magnetic disk recording device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsDaisuke Sudo, Hiroshi Isokawa
Life of this patent
Estimating the term…
Abstract
According to one embodiment, there is provided a disk device including a head, a disk, a first motor, and a first circuit. The disk has a recording surface. The first motor causes the head to seek along the recording surface. The first circuit can switch between a first state and a second state. The first state is a state where a current path of the first motor is electrically cut off from a first electricity storage unit. The second state is a state where the current path of the first motor is electrically connected to the first electricity storage unit.
Claims7
A disk device comprising:
- a head;
- a disk having a recording surface;
- a first motor that causes the head to seek along the recording surface;
- a first circuit that can switch between a first state and a second state, the first state being a state where a current path of the first motor is electrically cut off from a first electricity storage unit, the second state being a state where the current path of the first motor is electrically connected to the first electricity storage unit;
- a second motor that rotates the disk;
- and
- a second circuit that includes a rectifying circuit connected to a current path of the second motor and can switch between a third state and a fourth state, the third state being a state where the rectifying circuit is electrically cut off from a second electricity storage unit, the fourth state being a state where the rectifying circuit is electrically connected to the second electricity storage unit.
4 more elements
A disk device comprising:
- a head;
- a disk having a recording surface;
- a first motor that causes the head to seek along the recording surface;
- a first circuit that can switch between a first state and a second state, the first state being a state where a current path of the first motor is electrically cut off from a first electricity storage unit, the second state being a state where the current path of the first motor is electrically connected to the first electricity storage unit;
- a power supply circuit;
- and
- a third circuit that can switch between a fifth state and a sixth state, the fifth state being a state where the first electricity storage unit is electrically cut off from the power supply circuit, the sixth state being a state where the first electricity storage unit is electrically connected to the power supply circuit.
4 more elements
A disk device comprising:
- a head;
- a disk having a recording surface;
- a first motor that causes the head to seek along the recording surface;
- and
- a first circuit that can switch between a first state and a second state, the first state being a state where a current path of the first motor is electrically cut off from a first electricity storage unit, the second state being a state where the current path of the first motor is electrically connected to the first electricity storage unit,
- wherein the first circuit switches from the first state to the second state during a seek time period when the head is made to seek,
- wherein the seek time period includes:
- a first period when absolute value of acceleration of the head exceeds a first threshold;
- and
- a second period subsequent to the first period and when absolute value of acceleration of the head is smaller than the first threshold, and
- wherein the first circuit switches from the first state to the second state at a first timing corresponding to switching from the first period to the second period.
8 more elements
A disk device comprising
- a head;
- a disk having a recording surface;
- a first motor that causes the head to seek along the recording surface;
- a first circuit that can switch between a first state and a second state, the first state being a state where a current path of the first motor is electrically cut off from a first electricity storage unit, the second state being a state where the current path of the first motor is electrically connected to the first electricity storage unit;
- and
- an electricity storage terminal that can be connected to the first electricity storage unit via a power line,
- wherein the first state is a state where a current path of the first motor is electrically cut off from the first electricity storage unit via the electricity storage terminal and the power line, and
- wherein the second state is a state where the current path of the first motor is electrically connected to the first electricity storage unit via the electricity storage terminal and the power line.
5 more elements
Dependencies are inferred from the claim text.