Design and analyzes a new ring core fluxgate sensor

For advanced applications, fluxgate sensor should offer high magnetic field sensitivity as well as directionality. There has been a large demand for the integrated fluxgate sensors containing sensor and the supporting circuit on the same silicon chip. Since integrated circuits have driving current limitation, main motivation of this research is to optimize sensor core geometry to achieve high sensitivity and directionality at operating current. In this work, fluxgate sensors have been simulated and analyzed and by changing the core shape, the excitation current of the sensor has been reduced multiple times, which results in drastic reduction in overall power consumption. Sensors with different core geometries are also analyzed for the optimization of directionality.