C-MOS Multivibrator Type Micro Magnetic Sensor Using Amorphous Wire Magneto-Impedance(MI) Head.

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  • Ｃ‐ＭＯＳマルチバイブレータ発振形アモルファスワイヤＭＩマイクロ磁界センサ
  • C-MOS マルチバイブレータ ハッシンケイ アモルファス ワイヤ MI マイ

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Description

A new sensitive and low power consumption micro magnetic sensor is presented using an amorphous wire MI head installed in a C-MOS multivibrator. The impedance in the MI head is sensitively changed with more than 80%/Oe due to a sharp current magnetization during a transient period in the C-MOS inverter. The sensor circuit operates with a high stability due to a current source like operation in the source line and the independence of the field detection sensitively on the oscillation frequency of the multivibrator. A power consumption is less than 1mW in the C-MOS multivibrator having a 250kHz oscillation frequency.

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