A novel micro-magnetic sensor based on GMI effect

In the field of military applications, long-distance military target detection requires magnetic sensors a higher sensitivity and overall performance. To this end, this paper intends to develop a new high-resolution GMI magnetic sensor. The sensor adopts the constant bias magnetic field feedback control system, and the circuit structure is optimized. It can effectively suppress the noise and reduce the noise density of the output noise, improve the sensitivity and stability of the magnetic sensor, and achieve the purpose of detecting the change of the weak magnetic field.