Low noise CMOS micro-fluxgate magnetometer

Author

Drljaca, P.M. ; Kejik, P. ; Vincent, F. ; Popovic, R.S.

Author_Institution

Inst of Microelectron. & Microsys., Swiss Fed. Inst. of Technol., Lausanne, Switzerland

Volume

1

fYear

2003

Firstpage

304

Abstract

We present a new two-axis fluxgate magnetometer fully integrated in CMOS technology. The magnetometer exhibits excellent sensitivity of 2700 V/T and the magnetic equivalent noise spectral density of 6nT//spl radic/Hz at 1 Hz. The total power consumption is as low as 35 m W from the single 5 V power supply. The low noise characteristic is obtained using the combination of good magnetic . material properties and electronic post-modulation technique to reduce the noise coming from CMOS electronic part.

Keywords

fluxgate magnetometers; magnetic noise; magnetic sensors; power consumption; sensitivity; 35 mW; 5 V; CMOS electronic part; CMOS technology; electronic post-modulation; low noise characteristics; magnetic equivalent noise; material properties; power consumption; power supply; sensitivity; spectral density; two-axis fluxgate magnetometer; CMOS technology; Coils; Degradation; Magnetic cores; Magnetic field measurement; Magnetic noise; Magnetic sensors; Magnetometers; Noise reduction; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, 12th International Conference on, 2003

Conference_Location

Boston, MA, USA

Print_ISBN

0-7803-7731-1

Type

conf

DOI

10.1109/SENSOR.2003.1215313

Filename

1215313