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《Journal of Jilin University(Information Science Edition)》 2006-05
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Noise Analysis in Data Acquisition Channel of Broad Band Seismic Recorder

LI Wei~a,CHEN Zu-bin~a,b(a.College of Instrument Science and Electrical Engineering;b.Key Laboratory o f Geo-Exploration and Instrumentation Ministry of Education,Jilin University,Ch angchun 130061,China)  
In order to prove the rationality of low noise design of data acquisition module in broadband seismic recorder from the noise theory aspect,the equivalent E_n-I_n noise model theory and the calculated method of noise were adopted t o analyze and calculate the noise in data acquisition channel.It is proved that the equivalent input noise less than 2 μv meets the criterion through the expe riment result and the theory analysis.Furthermore,the experiment result approa ches the theoretical value,so the theory can be used in analyzing the noise of seismic recorder.This provides foundations for low noise design in data acquisi tion section in broadband seismic recorder.
【Fund】: 国家自然科学基金资助项目(40574079);; 吉林省杰出青年基金资助项目(20040118)
【CateGory Index】: P315.62
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