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 um 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. © 2006 IEEE.

Baschirotto, A., Borghetti, F., Dallago, E., Malcovati, P., Marchesi, M., Venchi, G. (2006). A CMOS front-end circuit for integrated fluxgate magnetic sensors. In Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on (pp.4403-4406). 345 E 47TH ST, NEW YORK, NY 10017 USA : IEEE [10.1109/ISCAS.2006.1693605].

A CMOS front-end circuit for integrated fluxgate magnetic sensors

BASCHIROTTO, ANDREA;
2006

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 um 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. © 2006 IEEE.
No
paper
Electric excitation; Electric power utilization; Harmonic analysis; Magnetic flux; Magnetic sensors; Magnetometers;
English
ISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems
9780780393905
Baschirotto, A., Borghetti, F., Dallago, E., Malcovati, P., Marchesi, M., Venchi, G. (2006). A CMOS front-end circuit for integrated fluxgate magnetic sensors. In Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on (pp.4403-4406). 345 E 47TH ST, NEW YORK, NY 10017 USA : IEEE [10.1109/ISCAS.2006.1693605].
Baschirotto, A; Borghetti, F; Dallago, E; Malcovati, P; Marchesi, M; Venchi, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/36591
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