Quadratic current slew control circuit
AssigneeMarvell International Ltd.
InventorsXiao Yu Miao, Wei Guo
Life of this patent
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Abstract
Systems and techniques relate to current slew control circuits. According to an aspect, a system implementing the quadratic slew control aspects comprises a disk; a read/write head; and a slew control circuit coupled to the read/write head, the slew control circuit configured to: receive an input current signal, apply a slew current to the input current signal in response to a change in a power setting for the read/write head, and provide an output current signal that is adjusted to a quadratic current slew based on the applied slew current, the output current signal generating an output voltage characterized by a linear slew and controlling a movement of the read/write head over the disk.
Claims20
A hard disk drive (HDD) system comprising:
- a disk;
- a read/write head;
- and
- a slew control circuit coupled to the read/write head, the slew control circuit configured to:
- receive an input current signal,
- apply a slew current to the input current signal in response to a change in a power setting for the read/write head, and
- provide an output current signal that is adjusted to a quadratic current slew based on the applied slew current, the output current signal generates an output voltage characterized by a linear slew and controls a movement of the read/write head over the disk.
An apparatus comprising:
- circuitry configured to receive an input current signal, and apply a slew current to the input current signal in response to a change in a power setting for a read/write head;
- circuitry configured to provide an output current signal that is adjusted to a quadratic current slew based on the applied slew current, the output current signal generates an output voltage characterized by a liner slew and controls a movement of the read/write head over a disk.
A method comprising:
- receiving an input current signal;
- applying a slew current to the input current signal in response to a change in a power setting for the read/write head;
- and
- providing an output current signal that is adjusted to a quadratic current slew based on the applied slew current, the output current signal generating an output voltage characterized by a linear slew and controlling a movement of the read/write head over the disk.
Dependencies are inferred from the claim text.