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adaptive vormagnetisierungssystem for individual mr wandlerkopf / disk / channel
adaptive vormagnetisierungssystem for individual mr wandlerkopf / disk / channel
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机译:单个MR换能器头/盘/通道的自适应偏置系统
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摘要
In a magnetic data storage device having data recorded in tracks on a media surface and including at least one magnetoresistive (MR) transducer read heads, the adaptive control method for the read head bias current involves determining an optimised bias current value for each MR head. The optimised values are stored, and the active MR head is supplied with a bias current in accordance with the stored value. The optimised bias current value is periodically re-determined for each MR head, and the stored bias current values are revised to correspond with the new optimised bias current values. The bias current values are stored on a disk media surface and are transferred from disk storage to random access memory during the power up sequence of the device.
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