Method and system for limiting current in a read/write head retract circuit
First Claim
1. A method for limiting current in a disk drive read/write head retract circuit comprising the steps of:
- sensing a temperature at a temperature sensor;
generating an output signal at the temperature sensor, the output signal indicating whether the temperature is above a threshold temperature;
receiving at a voltage regulator an input signal operatively associated with the output signal of the temperature sensor; and
adjusting a voltage applied to an actuator motor by the voltage regulator in response to the input signal of the voltage regulator.
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Accused Products
Abstract
A method and system for limiting current in a read/write head retract circuit is disclosed. The system includes a temperature sensor (75) for sensing a temperature of the disk drive read/write head retract circuit (53). The temperature sensor (75) generates an output signal indicating whether the temperature is above or below a threshold temperature. The system also includes a voltage regulator (100) which applies a voltage to an actuator motor (54). The voltage regulator (100) receives an input signal operatively associated with the output signal of the temperature sensor (75), and adjusts the voltage applied to the actuator motor (54) in response to the input signal. In one embodiment, the system includes a hysteresis circuit (88) which adjusts the threshold temperature of the temperature sensor (75) when the temperature sensor output changes. The hysteresis circuit (88) prevents the system from oscillating rapidly around the threshold temperature of the temperature sensor (75), and thereby avoids unnecessary wear of the system components.
33 Citations
20 Claims
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1. A method for limiting current in a disk drive read/write head retract circuit comprising the steps of:
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sensing a temperature at a temperature sensor; generating an output signal at the temperature sensor, the output signal indicating whether the temperature is above a threshold temperature; receiving at a voltage regulator an input signal operatively associated with the output signal of the temperature sensor; and adjusting a voltage applied to an actuator motor by the voltage regulator in response to the input signal of the voltage regulator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A disk drive read/write head retract circuit comprising:
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a temperature sensor operable to sense a temperature of the disk drive read/write head retract circuit and to generate an output signal indicating whether the temperature is above a threshold temperature; and a voltage regulator operable to receive an input signal operatively associated with the output signal of the temperature sensor, and operable to adjust a voltage applied to an actuator motor in response to the input signal. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A disk drive comprising:
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a disk having a data storage medium; a read/write head operable to read data from the data storage medium of the disk; an actuator motor operable to move the read/write head across a surface of the disk; a temperature sensor operable to sense a control circuit temperature and to generate an output signal; and a voltage regulator operable to apply a voltage to the actuator motor, and operable to receive an input signal operatively associated with the output signal of the temperature sensor, and operable to adjust the voltage applied to the actuator motor in response to the input signal. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification