摘要
旨在设计一套基于AD8334的宽带高增益光声信号调理电路,并通过FPGA控制增益线性变化来实现时间增益补偿(time gain compensation,TGC),以校正由于光与超声随传播深度改变的衰减而导致畸变的光声信号。实验证明该方案能有效地对高频光声信号进行放大和动态增益调节,对克服光声信号传播受深度影响的缺陷具有良好的效果。
An AD8334-based wideband and high-gain photoacoustic signal conditioning circuit is designed in this paper. The gain of the circuit is controlled by FPGA linearly to achieve time gain compensation（TGC）, which brings about correction of photoacoustic signal distortion results from different optical and ultrasonic attenuation in different propagation depth. The experimental results demonstrate that the program can effectively ground to high-frequency photoacoustic signal to zoom in and gain compensation. It has a good effect to overcome the defect of photoacoustic signal attenuation affected by the propagation depth.
出处
《电子测量技术》
2014年第8期10-14,共5页
Electronic Measurement Technology
基金
国家自然科学基金(61178089/81201124)
福建省科技厅重点(2011Y0019)项目
