Temperature compensation systems and methods for use with read/write heads in magnetic storage devices
First Claim
1. A method of sensing and controlling a temperature of a resistive element configured for use in a read/write head of a magnetic data disk storage device, the method comprising:
- detecting a voltage across the resistive element of said magnetic data disk storage device, the voltage varying as a function of a temperature of the resistive element;
comparing the voltage to a predetermined value to determine a variation of the voltage from the predetermined value; and
altering a power applied to the resistive element based on the variation, the temperature of the resistive element varying as a function of the altered applied power.
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Accused Products
Abstract
Disclosed herein are methods and systems for sensing and controlling the temperature of a resistive element configured for use in a read/write head of a magnetic data storage device. In one embodiment, a method includes detecting a voltage across the resistive element, where the voltage varies as a function of a temperature of the resistive element. The method also includes comparing the voltage to a predetermined value to determine a variation of the voltage from the predetermined value, and then altering a power applied to the resistive element based on the variation. In this exemplary embodiment, the temperature of the resistive element is then controlled as a function of the altered applied power.
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Citations
24 Claims
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1. A method of sensing and controlling a temperature of a resistive element configured for use in a read/write head of a magnetic data disk storage device, the method comprising:
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detecting a voltage across the resistive element of said magnetic data disk storage device, the voltage varying as a function of a temperature of the resistive element; comparing the voltage to a predetermined value to determine a variation of the voltage from the predetermined value; and altering a power applied to the resistive element based on the variation, the temperature of the resistive element varying as a function of the altered applied power. - View Dependent Claims (2, 3, 6, 7)
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4. A method of sensing and controlling a temperature of a resistive element configured for use in a read/write head of a magnetic data storage device, the method comprising:
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detecting a voltage across the resistive element of said magnetic data storage device, the voltage varying as a function of a temperature of the resistive element; comparing the voltage to a predetermined value to determine a variation of the voltage from the predetermined value; and altering a power applied to the resistive element based on the variation, the temperature of the resistive element varying as a function of the altered applied power, wherein detecting a voltage further comprises detecting a voltage across the resistive element using an output of a lowpass filter coupled to the resistive element.
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5. A method of sensing and controlling a temperature of a resistive element configured for use in a read/write head of a magnetic data storage device, the method comprising:
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detecting a voltage across the resistive element of said magnetic data storage device, the voltage varying as a function of a temperature of the resistive element; comparing the voltage to a predetermined value to determine a variation of the voltage from the predetermined value; and altering a power applied to the resistive element based on the variation, the temperature of the resistive element varying as a function of the altered applied power, wherein detecting a voltage further comprises detecting a voltage across the resistive element when there is no power applied to the resistive element.
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8. A method of sensing and controlling a temperature of a first resistive element configured for use in a read/write head of a magnetic data storage device, the method comprising:
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detecting a voltage across a second resistive element of said magnetic data disk storage device thermally proximate to the first resistive element, the voltage varying as a function of a temperature of the second resistive element; comparing the voltage to a predetermined value to determine a variation of the voltage from the predetermined value; altering a power applied to the second resistive element based on the variation, the temperature of the second resistive element varying as a function of the altered applied power; and affecting the temperature of the first resistive element with the temperature of the second resistive element due to the thermal proximity. - View Dependent Claims (9, 10, 11, 14, 15)
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12. A method of sensing and controlling a temperature of a first resistive element configured for use in a read/write head of a magnetic data storage device, the method comprising:
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detecting a voltage across a second resistive element of said magnetic data storage device thermally proximate to the first resistive element, the voltage varying as a function of a temperature of the second resistive element; comparing the voltage to a predetermined value to determine a variation of the voltage from the predetermined value; altering a power applied to the second resistive element based on the variation, the temperature of the second resistive element varying as a function of the altered applied power; and affecting the temperature of the first resistive element with the temperature of the second resistive element due to the thermal proximity, wherein detecting a voltage further comprises detecting a voltage across the second resistive element using an output of a lowpass filter coupled to the second resistive element.
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13. A method of sensing and controlling a temperature of a first resistive element configured for use in a read/write head of a magnetic data storage device, the method comprising:
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detecting a voltage across a second resistive element of said magnetic data storage device thermally proximate to the first resistive element, the voltage varying as a function of a temperature of the second resistive element; comparing the voltage to a predetermined value to determine a variation of the voltage from the predetermined value; altering a power applied to the second resistive element based on the variation, the temperature of the second resistive element varying as a function of the altered applied power; and affecting the temperature of the first resistive element with the temperature of the second resistive element due to the thermal proximity wherein detecting a voltage further comprises detecting a voltage across the second resistive element when there is no power applied to the resistive element.
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16. A system for sensing and controlling a temperature of a resistive element configured for use in a read/write head of a magnetic data storage device, the system comprising:
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a resistive element of said magnetic data disk storage device having a voltage thereacross, the voltage varying as a function of a temperature of the resistive element; comparison circuitry configured to compare the voltage across the resistive element with a predetermined value, and to generate an error signal based on the comparison; and a control compensation module configured to receive the error signal and to alter a power applied to the resistive element based thereon, the temperature of the resistive element varying as a function of the altered applied power. - View Dependent Claims (17, 18, 20, 21, 22, 23, 24)
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19. A system for sensing and controlling a temperature of a resistive element configured for use in a read/write head of a magnetic data storage device, the system comprising:
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a resistive element of said magnetic data storage device having a voltage thereacross, the voltage varying as a function of a temperature of the resistive element; comparison circuitry configured to compare the voltage across the resistive element with a predetermined value, and to generate an error signal based on the comparison; and a control compensation module configured to receive the error signal and to alter a power applied to the resistive element based thereon, the temperature of the resistive element varying as a function of the altered applied power, further comprising a lowpass filter coupled across the resistive element for detecting the voltage across thereacross by isolating low frequency signals received from the resistive element.
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Specification