3 . The processing circuit based on the reflecting wave signal from well surfaceand indicator diagram signal is designed,which is focused on the circuitdesigning in two-order low pass active filtering circuit of reflected wavesignal.
3．设计液面反射波信号以及功图信号处理电路，重点是液面反射波信号二阶有源低通滤波电路并进行仿真实验。
参考来源 - 油田综合试井仪器的研究与开发·2,447,543篇论文数据，部分数据来源于NoteExpress
Suit for use in filtering circuit of color TV, computer and home appliance.
适用于彩电，电脑，功放，仪表仪器，家用电器等电源滤波。
On the basis of test, EMI source in E1coaxial line is analyzed, different suppression techniques are compared and optimized filtering circuit is chosen.
在试验研究的基础上，对E1同轴传输线上电磁骚扰源进行了分析，测试比较不同的滤波抑制措施，确定了优化的抑制方案。
A control circuit part comprises a band-pass circuit, a primary amplifying circuit, a differential detection circuit, a demodulation circuit, a low-pass filtering circuit and the like.
控制电路部分由带通电路、一级放大电路、差动检测电路、解调电路、低通滤波电路等部分组成。
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