| 摘要 |
PROBLEM TO BE SOLVED: To reduce an electric power consumption in a magnetic field detecting element to which a negative feedback magnetic field and a bias magnetic field are impressed for use. SOLUTION: A common coil C for impressing the bias magnetic field and the negative feedback magnetic field is laid along an element A for detecting an external magnetic field for outputting a modulated wave modulated by the external magnetic field under carrying of an excitation current.
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