Researching on the Preprocessor of Microwaveinduced Thermoacoustic Signals
According to analyzing the microwave-induced thermoacoustic signals, the ranges of the amplitude and frequency were estimated and the designing parameters of preprocessor were decided. Based on the parameters, the signal preprocessor was designed with band pass frequency range from100 KHz to 2.5MHz, gain range from 55dB to 100dB and output noise is 845mV when the input was zero and the gain was 100dB. The signals, which were amplified 88dB by the preprocessor, were obtained from the experiment successfully. The de-noising method of these signals was also discussed. The results indicated that the preprocessor can meet the needs of thermoacoustic signals acquisition in bandwidth, gain and noise control very well.
Thermoacoustic signals Preprocessor Bandwidth Gain
Jiao Teng Wei Yusen Wang Hua Zhu Xinya Yang Ying Yu Xiao Yang Guosheng
Department of BME, the Fourth Military Medical University, XiAn Shaanxi CHN 710032 Department of EE, XiAn University of Technology, XiAn Shaanxi CHN 710048
国际会议
上海
英文
1632-1635
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）