基于磁反馈的磁调谐器件激励方法  

Magnetic tuning device excitation method based on magnetic feedback

作　　者：吴江 赵勇[1] 马金龙 李晟 王玲巧 WU Jiang;ZHAO Yong;MA Jin-long;LI Sheng;WANG Ling-qiao(Southwest Institute of Applied Magnetics,Mianyang 621000,China;Northwest Industries Group Co,Ltd,Xi’an 710043,China)

机构地区：[1]西南应用磁学研究所,四川绵阳621000 [2]西北工业集团有限公司,陕西西安710043

出　　处：《磁性材料及器件》2023年第3期35-38,共4页Journal of Magnetic Materials and Devices

摘　　要：磁调谐器件激励电路主要通过采样电流形成恒流源,从而获得稳定磁场,但是此方法容易出现器件频率漂移。针对现有技术存在的问题,提出一种基于磁反馈的磁调谐器件激励电路,通过采用磁传感电路检测磁场的感应电压形成反馈回路,将应力、温度、磁滞等因素的影响纳入闭环控制,从而减小甚至消除磁调谐器件的频率漂移,同时可减小器件的温升,提高可靠性。The current magnetic tuning device excitation circuit mainly forms a constant current source by sampling the current to obtain a stable magnetic field,but this method is prone to the frequency drift of the device.This paper proposes a magnetic feedback-based excitation circuit for magnetic sensing circuit to detect the induced voltage of the magnetic field to form a feedback loop and incorporates the effects of stress,temperature and hysteresis into closed-loop control.So as to reduce or even eliminate the frequency drift of the magnetotuned device,and at the same time reduce the temperature rise of the device and improve reliability.

关 键 词：磁调谐器件 激励电路 频率漂移 磁反馈 电路 

分 类 号：TN74[电子电信—电路与系统]