| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic measuring apparatus having an improvement in measurement precision. SOLUTION: A magnetic sensor 11 measures the intensity of magnetism in the direction of a Z-axis. Output of the magnetic sensor 11 is amplified by amplifiers 62 and 63, and output of the amplifiers 62 and 63 is further differentially amplified by an amplifier 64. Output of a tilt sensor 12 is amplified by an amplifier 66. Output of the amplifiers 64 and 66 is directly connected to a terminal 68. The terminal 68 is connected to an input end of an A/D converter. The amplifiers 64 and 66 are each constituted of an amplifier having two output states of an active state and a high-impedance state. Input to the A/D converter is thereby executed by the direct connection of each output end to improve measurement precision in comparison with the case of switching through the use of switches. COPYRIGHT: (C)2006,JPO&NCIPI
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