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设计一套基于AD8334的宽带大范围可调增益的光声信号放大电路,并对电路的噪声问题进行了简要分析,提出几点改进的措施.实验结果表明,该方案能在几种常规滤波的配合下有效地提取并按照设定增益放大高频光声信号,为系统噪声性能改进工作提供了有益的参考.
A set of broadband wide-band adjustable gain photoacoustic signal amplification circuit based on AD8334 is designed and the noise of the circuit is briefly analyzed. Some measures for improvement are given. The experimental results show that this scheme can be used in several kinds of conventional filtering With the cooperation of effective extraction and in accordance with the set gain amplification of high-frequency photoacoustic signal, the system noise performance improvement provides a useful reference.