A Miniature Fluxgate Sensor with CMOS Interface Circuitry
In this paper, the writers reported on a fluxgate sensor and a CMOS-ASIC for sensor supply. The design method and principle of the interface circuit of the fluxgate sensor was also presented, which was based on second-harmonic detection of the output voltage. This circuit has been simulated and realized through 0.5μm DPDM P-sub CMOS Process. The size of this circuit is 2mm×2mm. The circuit exhibited a sensitivity of 16.5mV/μT and a linear range of ±90μT. With 5V of voltage supply, the total power consumption of the circuit was as low as 35 mW.
W. P. Chen et al., "A Miniature Fluxgate Sensor with CMOS Interface Circuitry", Key Engineering Materials, Vol. 483, pp. 164-168, 2011