磁通门信号处理电路分析与设计

Analysis and Design for Signal Processing Circuit of Fluxgate

对传感器信号处理采用的二次谐波反馈电路,电路为闭环系统。其磁通门电路包括激磁和信号处理电路。根据磁通门探头的输出特性及电路功能,其设置包括:选频放大、相敏检波、积分滤波和反馈环节。电路设计则由激磁和倍频、选频放大、相敏检波和积分环节、反馈环节及温度补偿等电路组成。

Adopting the reactive circuit of twice harmonic to process the sensor signal, the system is closed loop. The circuit of stimulating magnetis .m and signal processing are included in the circuit of fluxgate. According to the outputting trait of fluxgate detector and function of circuit, band-pass amplifier, phase-sensitive detector, integral filter, and feedback part form the circuit. Exciting magnetism, multi-band, band-pass amplifier, phase-sensitive detector, the part of integral and feedback and compensation of temperature and so on comprise the design of circuit.