AD8334-based Signal Conditioning Circuit Design and Noise Analysis in Photoacoustic Signal Acquisition

An AD8334-based wideband circuit for photoacoustic signal conditioning with large scale adjustable gain is designed in this paper. What's more,the noise of the circuit is also simply analyzed in it,as well as several improvements are proposed. The experimental results show that the program can effectively acquire and amplify high-frequency photoacoustic signal in setted gain with several conventional filtering methods. This paper may offer some useful references to future improvements of the system's noise performance.