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US 11,081,988 B1Granted
Data storage device with spread spectrum spindle motor control
AssigneeWestern Digital Technologies, Inc.
InventorJaesoo Byoun
Life of this patent
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Abstract
A data storage device is disclosed comprising a head actuated over a disk, and a spindle motor configured to rotate the disk. A pulse width modulated (PWM) control signal is generated having a frequency based on a PWM clock, the spindle motor is controlled using the PWM control signal, and a frequency of the PWM clock is swung between a minimum frequency and a maximum frequency at a swing rate.
Claims20
A data storage device comprising:
- a disk;
- a head actuated over the disk;
- a spindle motor configured to rotate the disk;
- and
- control circuitry configured to:
- generate a pulse width modulated (PWM) control signal having a frequency based on a PWM clock;
- control the spindle motor using the PWM control signal;
- and
- swing a frequency of the PWM clock between a minimum frequency and a maximum frequency at a swing rate.
6 more elements
Control circuitry configured to:
- clock a modulator with a modulation clock to generate a modulated control signal;
- control switching circuitry of a spindle motor using the modulated control signal;
- and
- swing a frequency of the modulation clock between a minimum frequency and a maximum frequency at a swing rate.
1 more element
A data storage device comprising:
- a disk;
- a head actuated over the disk;
- a spindle motor configured to rotate the disk;
- a means for generating a pulse width modulated (PWM) control signal having a frequency based on a PWM clock;
- a means for controlling the spindle motor using the PWM control signal;
- and
- a means for swinging a frequency of the PWM clock between a minimum frequency and a maximum frequency at a swing rate.
4 more elements
Dependencies are inferred from the claim text.