磁芯采用高频脉冲电流励磁，信号处理电路由峰值检波、低通滤波及差动电路构成。
The toroidal core was excited by sharp pulse current. The sensor circuit is composed of peak value detector, Butterworth low-pass filter and differential amplifier.
高频变压器设计部分通过面积乘积法算得变压器的磁芯型号、绕线规格和绕制方法。
The high frequency transformer is designed by the AP method. The type of magnetic core, wire guage and the coiling method are computed by the AP method.
采用超磁致伸缩材料作为阀芯的高频响应元件，及精心设计的阀驱动电路，以提高电磁阀的响应频率；
Response frequency is increased by giant magnetostrictive material as valve core component and elaborate designed drive circuit.
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