NDLI: A CMOS front-end circuit for integrated fluxgate magnetic sensors

Content Provider	IEEE Xplore Digital Library
Author	Baschirotto, A. Borghetti, F. Dallago, E. Malcovati, P. Marchesi, M. Venchi, G.
Copyright Year	2006
Description	Author affiliation: Dept. of Innovation Eng., Lecce Univ. (Baschirotto, A.)
Abstract	In this paper an integrated CMOS front-end circuit for a micro-integrated fluxgate magnetometer is proposed. The system is based on excitation block, that feeds the excitation coil of the sensor and a read-out block that sense the voltage of the pick-up coils. To sense the output signal, the second harmonic detection principle has been chosen to achieve a good compromise between power consumption and noise requirements. An integrated low pass Sallen-Key filter has been used to extract the dc signal after the demodulation. The preliminary measurements, performed with a PCB sensor, show a sensitivity of 920 V/T and a linearity error of 6% full scale. The circuit has been realized in a standard 0.35 mum CMOS process. The power consumption is 8 mW @ 3.3V for the excitation and read-out parts and unit and 42 mW @ 5V for the output power stage
Sponsorship	The Inst. of Electr. and Electron. Eng., Inc. Circuits and Syst. Soc. (IEEE CASS)
Starting Page	4
Ending Page	4406
File Size	1232043
Page Count	4403
File Format	PDF
ISBN	0780393899
DOI	10.1109/ISCAS.2006.1693605
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-21
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic circuits Magnetic sensors Coils Power harmonic filters Energy consumption Magnetometers Feeds Sensor systems Voltage Power system harmonics
Content Type	Text
Resource Type	Article

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