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中文摘要：
文中介绍了一种基于纤毛式MEMS矢量水听器微弱信号提取电路。该电路采用两级信号放大,两级之间设计二阶巴特沃斯低通滤波器。该电路设计经电路仿真软件进行仿真和水下测试。测试结果表明：该微弱信号提取电路可以很好地对水听器采集到的信号进行放大,表现为水听器的接收灵敏度为-160 dB（0 dB=1 V/μPa）。采用这种电路设计的MEMS矢量水听器不仅具有令人满意的＂8＂字形方向特性,而且具有良好的低频特性,可以满足低频声学测试需要。
英文摘要：
A weak signal extraction circuit based on cilia-type MEMS vector hydrophone was presented.This circuit was simulated by PSpice included two-stage amplifier and a second-order Butterworth low-pass filter between the two amplifier modules.According to the results of underwater measurement,the circuit can be as a well module for the amplication of vector hydrophone signal and its receiver sensitivity is as high as-160 dB（0 dB=1 V/μP）.The MEMS vector hydrophone with this design not only possesses the directional pattern in the form of ＂8＂shape,but also has the good lowfrequency characteristic to meet the needs of low-frequency acoustic measurement.
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