- 著者
- 内山 剛 山口 明啓 内海 裕一
- 出版者
- 公益社団法人 日本磁気学会
- 雑誌
- Journal of the Magnetics Society of Japan (ISSN:18822924)
- 巻号頁・発行日
- vol.34, no.4, pp.533-536, 2010-07-01 (Released:2010-07-13)
- 参考文献数
- 7
In this experiment, we investigated noise characteristics of a pulse magneto-impedance sensor which is based on an amorphous magnetic wire with a pickup coil. For a helical static magnetization, the ac current i passing the wire induces a coil voltage Vc in the coil around the wire. The pulsed excitation, combining both high and low frequency harmonic, produces the voltage Vc with dc current biasing. We describe improvements of pulse excitation conditions for an amorphous magnetic wire to reduce magnetic noises. The relation between the time interval of a current pulse train T and magnetic noises was investigated. The magnetic noise is suppressed clearly when T is smaller than 1.5 μs for pulse width 10 ns. Under the optimal conditions, the rms noise of 1-cm-long an amorphous wire magneto-impedance sensor with 600 turns of the pickup was estimated as 1pT/Hz1/2M at 20 Hz∼500 Hz.
- 著者
- 近藤 沙妃 畔田 吏 浮田 芳昭 片岡 千和 内海 裕一
- 出版者
- The Institute of Electrical Engineers of Japan
- 雑誌
- 電気学会論文誌. C (ISSN:03854221)
- 巻号頁・発行日
- vol.130, no.10, pp.1811-1816, 2010
The use of three-dimensional (3D) microstructures is becoming essential attempt to develop next generations' microdevices, to integrate many modules and various functions, and enhance the performance of device. In this paper, we present a new concept for lab on a chip using 3D structure and centrifugal force for high-throughput screening system, which has stacked multiple structures with 3D-interconnection.