Implementing noise based detection of spin torque oscillator power-on in microwave-assisted magnetic recording (MAMR) hard disk drives
First Claim
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1. A method for implementing noise based detection of spin-torque oscillator (STO) power on for microwave assisted magnetic recording (MAMR) hard disk drives (HDDs) comprising:
- detecting predefined low frequency noise generated by a spin-torque oscillator, andcomparing the detected STO noise to a predefined threshold to identify STO power on operation.
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Abstract
A method, apparatus, and system are provided for implementing noise based detection of spin-torque oscillator (STO) power on for microwave assisted magnetic recording (MAMR) hard disk drives (HDDs). A low frequency noise generated by a spin-torque oscillator, such as noise in a frequency range between 10 kHz and 100 MHz, is detected. The detected STO noise is compared to a predefined threshold to identify STO power on operation.
22 Citations
20 Claims
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1. A method for implementing noise based detection of spin-torque oscillator (STO) power on for microwave assisted magnetic recording (MAMR) hard disk drives (HDDs) comprising:
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detecting predefined low frequency noise generated by a spin-torque oscillator, and comparing the detected STO noise to a predefined threshold to identify STO power on operation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for implementing noise based detection of spin-torque oscillator (STO) power on for microwave assisted magnetic recording (MAMR) hard disk drives (HDDs), comprising:
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a controller; at least one disk;
said disk including a disk media for storing data;a spin-torque oscillator (STO) for microwave assisted magnetic recording (MAMR); a spin-torque oscillator (STO) power on detection circuit comprising a noise detector for detecting predefined low frequency noise generated by a spin-torque oscillator, and a comparator coupled to said noise detector for comparing the detected STO noise to a predefined threshold to identify STO power on operation. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A system for implementing noise based detection of spin-torque oscillator (STO) power on comprising:
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a microwave assisted magnetic recording (MAMR) hard disk drive (HDD), said MAMR HDD comprising a controller; at least one disk;
said disk including a disk media for storing data;a spin-torque oscillator (STO) for microwave assisted magnetic recording (MAMR); a spin-torque oscillator (STO) power on detection circuit comprising a noise detector for detecting predefined low frequency noise generated by a spin-torque oscillator, and a comparator coupled to said noise detector for comparing the detected STO noise to a predefined threshold to identify STO power on operation. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification