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Adjusting device and the adjustment manner and magnetic storage null of bias electric current of reluctance effective die magnetic
Adjusting device and the adjustment manner and magnetic storage null of bias electric current of reluctance effective die magnetic
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机译:磁阻有效压模磁铁的偏置电流的调整装置及调整方式及磁存储量
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摘要
PROBLEM TO BE SOLVED: To improve a utilization factor by making an investigation current flow through a magneto-resistance effect type magnetic head for calculating a resistance of the head from the current and a terminal voltage, determining a tolerance range of the bias current based on a pre-investigated relationship between the life and resistance, and setting an optimal bias current within the range. ;SOLUTION: A current control circuit 21b supplies a bias current to a magneto-resistance effect type magnetic head 10. A voltage detector 21c detects a voltage across both terminals of the magnetic head 10 then. A host system 50 works out a resistance of the magnetic head 10 from the bias current value and the voltage across the terminal. The host system 50 stores life data representing a relationship among resistance, bias current value, and life beforehand, and sets a tolerance of the bias current level referring to the relationship. And, the bias current is determined according to a prescribed optimal bias current setting procedure and also within a tolerance of the bias current.;COPYRIGHT: (C)1998,JPO
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