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《Progress In Geophysics》 2004-02
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The Δ-ΣA/D converting technique and its application in seismic exploration

YUAN Zi-long,LI Ting- ting(Daqing Petroleum Institute, Daqing 163318, China)  
The Δ-ΣA/D converting technique bases on the Δ modulating A/D converting technique. The basic theory of Δ modulating A/D converter , the signal-noise ratio and the noise shaping of Δ-ΣA/D converter are described and analyzed in this paper. The relationship between the orders of Δ-ΣA/D converter and the signal\|noise ratio and the sampling rate are discussed deeply. The paper draw the conclusion that it is the basic needs to use 24 bits Δ-ΣA/D converter in modern telemetric seismograph whose instantaneous dynamic range or the signal-noise ratio should be 120 dB.
【Fund】: 黑龙江省自然科学基金项目(2010222)资助.
【CateGory Index】: P631
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